Ritchie Group Online Library

• Nacre-Like Surface Nanolaminates Induce Superior Fatigue Resistance in Gradient Pure Titanium Y. Zhang, C. He, Q. Yu, X. Li, X. Wang, Y. Zhang, J. Wang, C. Jiang, Y. Jia, X-C. Zhang, B. Sun, R. O. Ritchie and S-T. Tu. Nature Communications, vol.15, Aug. 12, 2024, art.# 6917 (doi: doi.org/10.1038/s41467-024-51423-5.)

• Multiple Origins of Extra Electron Diffractions in fcc Metals F. Walsh, M. Zhang, R. O. Ritchie, M. Asta and A. M. Minor. Science Advances, vol. 10, Aug. 2, 2024, art.# eadn9673 (doi: doi.org/10.1126/sciadv.adn9673)

• On the Reduced High-Temperature Damage Tolerance of Fine-Grained Graphite Characterized using In Situ 4D Tomographic Imaging M. Jiang, J. Ell, H. Barnard, H. Wu, M. Kuball, R. O. Ritchie and D. Liu. Carbon, vol. 222, 2024, art.# 118924 (doi: doi.org/10.1016/j.carbon.2024.118924)

• Rejuvenation as the Origin of Planar Defects in the CrCoNi Medium Entropy Alloy Y. Yang, S. Yin, Q. Yu, Y. Zhu, J. Ding, R. Zhang, C. Ophus, M. Asta, R. O. Ritchie and A. M. Minor. Nature Communications, vol. 15, Feb. 16, 2024, art.# 1402 (doi: doi.org/10.1038/s41467-024-45696-z)

• Robust and Sensitive Conductive Nanocomposite Hydrogel with Bridge Crosslinking-Dominated Hierarchical Structural Design T. Li, H. Qi, Y. Zhao, P. Kumar, C. Zhao, Z. Li, X. Dong, X. Guo, M. Zhao, X. Li, X. Wang, R. O. Ritchie and Wei Zhai. Science Advances, vol. 10 (5), Feb. 2, 2024, art.# eadk6643 (doi: doi.org/10.1126/sciadv.adk6643)

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• A Strong Fracture-Resistant High-Entropy Alloy with Nano-Bridged Honeycomb Microstructure Intrinscally Toughened by 3D-Printing P. Kumar, S. Huang, D. H. Cook, K. Chen, U. Ramamurty, X. Tan and R. O. Ritchie. Nature Communications, vol. 8, Jan. 29, 2024, art.# 841 (doi: doi.org/10.1038/s41467-024-45178-2)

• Type 2 Diabetes Impairs Annulus Fibrosus Fiber Deformation and Rotation under Disc Compression in the University of California Davis Type 2 Diabetes Mellitus (UCD-T2DM) Rat Model J. L. Rosenberg, E. Schaible, A. Bostrom, A. A. Lazar, J. L. Graham, K. L. Stanhope, R. O. Ritchie, T. N. Alliston, J. C. Lotz, P. J. Havel, C. Acevedo and A. J. Fields. PNAS Nexus, vol. 2 (12), Dec. 2023, art.# pgad363 (doi: doi.org/10.1093/pnasnexus/pgad363)

• Ductile Ultrastrong China Low Activation Martensitic Steel with Lamellar Grain Structure J. H. Zhou, J. Wang, R. O. Ritchie, Y. C. Wu, J. W. Cheng, L. Wang, X. W. Yin, Y. F. Jiang and J. G. Ren. International Journal of Plasticity, vol. 171, Dec. 2023, art.# 103813. (doi: doi.org/10.1016/j.ijplas.2023.103813)

• The Innate Interfacial Elastic Strain Field of a Transformable B2 Precipitate Embedded in an Amorphous Matrix X. Fu, Y. Lin, M. Zhu, K. Wang, J. Wu, X. Tong, W. Song, M. J. Tan, Y. Yang, J. Shen, G. Wang, C. H. Shek and R. O. Ritchie. npj Computational Materials, vol. 8, 2023, art.#266; (doi: doi.org/10.1038/s41524-023-01182-6)

• Origin of the High Propensity for Nanoscale Deformation Twins in the CrCoNi Medium-Entropy Alloy Z-J. Wang J. Ding, M. Asta, R. O. Ritchie, B. Gan, E. Ma and Z-W. Shan. Journal of Materials Science & Technology, vol. 183, 2024, pp. 63-71. (doi: doi.org/10.1016/j.jmst.2023.10.025)

• In Situ X-ray Computed Micro-Tomography Imaging of Failure Processes in Cr-Coated Zircaloy, Nuclear Fuel Cladding Materials G. Yuan, J. P. Forna-Kreutzer, J. Ell, H. Barnard, B. Maier, E. Lahoda, J. Walters; R. O. Ritchie and D. Liu. Materials & Design, vol.234, October 2023, art.# 112373 (doi: doi.org/10.1016/j.matdes.2023.112373.)

• The Critical Role of Corrugated Lamellae Morphology on the Tough Mechanical Performance of Natural Syncerus Caffer Horn Sheath K. Yang, H. Yu, J. Guan, S. Cai, Z. Yang, W. Huang, B. Wang, N. Qin, Z. Wu, W. Tian, S. Zhang and R. O. Ritchie. Cell Reports Physical Science, vol. 4, Sept. 20, 2023, art.# 101576 (doi: doi.org/10.1016/j.xcrp.2023.101576.)

• A Damage-Tolerant Ti-Rich Multiphase Metallic-Glass Composite with Hierarchically Heterogeneous Architecture S. Lin, Z. Zhu, Z. Liu, S. Ge, D. Liu, H. Li, Z. Li, H. Fu, A. Wang, Z. Zhang, H. Zhang and R. O. Ritchie. Composites Part B Engineering, vol. 263, August 15, 2023, art.# 110818 (doi: doi.org/10.1016/j.compositesb.2023.110818.)

• Molecular Weaving of Chicken Wire Covalent Organic Frameworks X. Han, T. Ma, B. L. Nannenga, X. Yao, S. E. Neumann, P. Kumar, J. Kwon, Z. Rong, K. Wang, Y. Zhang, J. A. R. Navarro, R. O. Ritchie, Y. Cui and O. M. Yaghi. Chem, vol. 9, 2023, pp. 1-9 (doi: doi.org/10.1016/j.chempr.2023.07.015.)

• Flexible All-Organic Nanocomposite Films Interlayered With In Situ Synthesized Sovalent Organic Frameworks for Electrostatic Energy Storage H. Li, Z Xie, C Yang, J. Kwon, A. Lainé, C. Dun, A. V. Galoustian, X. Li, P. Liu, J. J. Urban, Z. Peng, M. Salmeron, R. O. Ritchie, T. Xu and Yi Liu. Nano Energy, vol. 113, August 2023, art.# 108544 (doi: doi.org/10.1016/j.nanoen.2023.108544.)

• Extra Electron Reflections in Concentrated Alloys do not Necessitate Short-Range Order F. Walsh, M. Zhang, R. O. Ritchie, A. M. Minor and M. Asta. Nature Materials, vol. 22, Aug. 2023, pp. 926-929 (doi: doi.org/10.1038/s41563-023-01570-9.)

• A Strong, Lightweight, and Damping Cermet Material with a Nacre-Like Ultrafine 3D Interpenetrated Architecture Y. Liu, X. Xie, Z. Liu, Q. Yu, Q. Jia, S. Wang, Z. Zhang, R. Yang and R. O. Ritchie. Materials Today, vol. 62, 2023, pp. 62-70 (doi: doi.org/10.1016/j.mattod.2022.12.002.)

• Structural heterogeneity governing deformability of metallic glass Y. Hong, H. Wang, X. Li, L. Zhong, H. Chen, Z. Zhang, P. Cao, R. O. Ritchie and J. Wang. Matter, vol. 6, 2023, pp. 1160-1172 (doi: doi.org/10.1016/j.matt.2023.01.016.)

• Effect of Local Chemical Order on the Irradiation-Induced Defect Evolution in CrCoNi Medium-Entropy Alloy Z. Zhang, Z. Su, B. Zhang, Q. Yu, J. Ding, T. Shi, C. Lu, R. O. Ritchie and E. Ma. Proceedings of the National Academy of Sciences (PNAS), vol. 120 (15), 2023, art# e2218673120 (doi: doi.org/10.1073/pnas.2218673120.)

• Ultra-Strong Tungsten Refractory High-Entropy Alloy via Stepwise Controllable Coherent Nanoprecipitations T. Li, T. Liu, S. Zhao, Y. Chen, J. Luan, Z. Jiao, R. O. Ritchie and L. Dai. Nature Communications, vol. 14, May 25, 2023, art.# 3006 (doi: doi.org/10.1038/s41467-023-38531-4)

• Solving the Problem of Solidification Cracking during Additive Manufacturing of CrMnFeCoNi High-Entropy Alloys Through Addition of Cr3C2 Particles to Enhance Microstructure and Properties X. Wang, Z. Ji, R. O. Ritchie, I. Okulov, J. Eckert and C. Qui. Materials Today Advances, vol. 18, 2023, art# 100371 (doi: doi.org/10.1016/j.mtadv.2023.100371)

• Strong and tough magnesium-MAX phase composites with nacre-like lamellar and brick-and- mortar architectures Y. Liu, X. Xie, Z. Liu, Q. Yu, X. Wang, Q. Jia, Z. Zhang, R. Yang and R. O. Ritchie. Communications Materials, vol. 4, May 9, 2023, art.# 30 (doi: doi.org/10.1038/s43246-023-00358-3.)

• Bioinspired Fish-Scale-Like Magnesium Composites Strengthened by Contextures of Continuous Titanium Fibers: Lessons from Nature by Y. Liu, Q. Yu, G. Tan, M. Zhang, E. Tang, S. Wang, Z. Liu, Q. Wang, Z. Zhang and R. O. Ritchie. Journal of Magnesium and Alloys, vol, 11 (3), Mar 2023, pp. 869-881 (doi: doi.org/10.1016/j.jma.2021.06.023)

• Failure of the CrCoNi Medium-Entropy Alloy Subjected to Extreme Shock Loading by S. Zhao, S. Yin, X. Liang, F. Cao, Q. Yu, R. Zhang, L. Dai, C. J. Ruestes, R. O. Ritchie and A. M. Minor. Science Advances, vol. 9 (18), May 5, 2023, art. eadf8602 (doi: doi.org/10.1126/sciadv.adf8602)

• Robust Mechanical Performance and Fracture Behavior of TiO₂ Decorated Densified Bamboo as Sustainable Structural Materials by Z. Ba, H. Luo, J. Guan, J. Luo, J. Gao, S. Wu, and R. O. Ritchie. Nature Communications, vol. 14, Mar. 4, 2023, art. 1234 (doi: 10.1038/s41467-023-36939-6)

• In Situ High-Temperature 3D Imaging of the Damage Evolution in a SiC Nuclear-Fuel Cladding Material by G. Yuan, J. P. Forna-Kreutzer, P. Xu, S. Gonderman, C. Deck, L. Olson, E. Lahoda, R. O. Ritchie, and D. Liu. Materials & Design, vol. 227, Feb. 21, 2023, art. 111784 (doi: 10.1016/j.matdes.2023.111784)

• A Cell-Fee Silk Fibroin Biomaterial Strategy Promotes In Situ Cartilage Regeneration via Programmed Releases of Bioactive Molecules by Z. Mao, X. Bi, C. Wu, Y. Zheng, X. Shu, S. Wu, J. Guan and R. O. Ritchie, Advanced Healthcare Materials, vol. 12 (1), Jan. 2, 2023, art. 2201588 (doi: 10.1002/adhm.202201588)

• Theoretical antiferromagnetism of ordered face-centered cubic Cr-Ni alloys by F. Walsh, R. O. Ritchie, and M. Asta, Physical Review Materials, vol. 6 (11), Nov. 2, 2022, art. 113602 (doi: 10.1103/PhysRevMaterials.6.113602)

• Growing Designability in Structural Materials by R. O. Ritchie and X. R. Zheng, Nature Materials, vol. 21, Aug. 24, 2022, pp. 968-970 (doi: 10.1038/s41563-022-01336-9)

• Exceptional Fracture Toughness of CrCoNi-Based Medium- and High-Entropy Alloys at 20 kelvin by D. Liu, Q. Yu, S. Kabra, M. Jiang, P. Forna-Kreutzer, R. Zhang, M. Payne, F. Walsh, B. Gludovatz, M. Asta, A. M. Minor, E. P. George and R. O. Ritchie, Science, vol. 378 (6623), Dec. 2, 2022, pp. 978-983 (doi: 10.1126/science.abp8070)

• Phase-Transforming Ag-NiTi 3-D Interpenetrating-Phase Composite with High Recoverable Strain, Strength and Electrical Conductivity by M. Zhang, Q. Yu, H. Wang, J. Zhang, F. Wang, Y. Zhang, D. Xu, Z. Liu, Z. Zhang and R. O. Ritchie, Applied Materials Today, vol. 29, 2022, art. 101639 (doi: 10.1016/j.apmt.2022.101639)

• Facile Processing of Oriented Macro-Porous Ceramics with High Strength and Low Thermal Conductivity by N. Zhang, Z. Liu, Y. Du, Q. Yu, S. Wang, G. Tan, B. Jiang, Z. Zhang and R. O. Ritchie, Journal of the European Ceramic Society, vol. 42 (15), 2022, pp. 7196-7202 (doi: 10.1016/j.jeurceramsoc.2022.07.044)

• Conductive Ink with Circular Life Cycle for Printed Electronics by J. Kwon, C. DelRe, P. Kang, A. Hall, D. Arnold, I. Jayapurna, L. Ma, M. Michalek, R. O. Ritchie and T. Xu, Advanced Materials, vol. 34 (30), July 27, 2022, art. 2202177 (doi: 10.1002/adma.202202177)

• On the Damage Tolerance of 3-D Printed Mg-Ti Interpenetrating-Phase Composites with Bioinspired Architectures by M. Zhang, N. Zhao, Q. Yu, Z. Liu, R. Qu, J. Zhang, S. Li, D. Ren, F. Berto, Z. Zhang and R. O. Ritchie, Nature Communications, vol. 13, June 6, 2022, art. 3247 (doi: 10.1038/s41467-022-30873-9)

• Anomalous Size Effect on Yield Strength Enabled by Compositional Heterogeneity in High-Entropy Alloy Nanoparticles by J. Yan, S. Yin, M. Asta, R. O. Ritchie, J. Ding and Q. Yu, Nature Communications, vol. 13, May 19, 2022, art. 2789 (doi: 10.1038/s41467-022-30524-z)

• Response to Comment on 'Cryoforged Nanotwinned Titanium with Ultrahigh Strength and Ductility' by S. Zhao, R. Zhang, Q. Yu, J. Ell, R. O. Ritchie and A. M. Minor, Science, vol. 376 (6594), May 13, 2022. (doi: 10.1126/science.abo5247)

• High-Entropy Materials by E. P. George and R. O. Ritchie, MRS Bulletin, vol. 47 (2), Mar. 15, 2022. (doi: 10.1557/s43577-022-00285-7)

• Fracture Properties of High-Entropy Alloys by B. Gludovatz and R. O. Ritchie, MRS Bulletin, vol. 47 (2), Feb. 25, 2022. (doi: 10.1557/s43577-022-00267-9)

• An In Situ Ambient and Cryogenic Transmission Electron Microscopy Study of the Effects of Temperature on Dislocation Behavior in CrCoNi-based High-Entropy Alloys with Low Stacking-Fault Energy by Y. Fang, Y. Chen, B. Chen, S. Li, B. Gludovatz, E. S. Park, G. Sheng, R. O. Ritchie and Q. Yu, Applied Physics Letters, vol. 119 (26), Dec. 27, 2021, art. 261903 (doi: 10.1063/5.0069086)

• Fatigue-Crack Propagation Behavior in a High-Carbon Chromium SUJ2 Bearing Steel: Role of Microstructure by N. Kowathanakul, Q. Yu, C. Zhu, X. Li, A. M. Minor and R. O. Ritchie, International Journal of Fatigue, vol. 156, 2022, art. 106693 (doi: 10.1016/j.ijfatigue.2021.106693)

• Comparison of Toughening Mechanisms in Natural Silk-Reinforced Composites with Three Epoxy Resin Matrices by K. Yang, Z. Wu, C. Zhou, S. Cai, Z. Wu, W. Tian, S. Wu, R. O. Ritchie and Juan Guan, Composites Part A, vol. 154, 2022, art. 106760 (doi: 10.1016/j.compositesa.2021.106760)

• An Amorphous Peri-Implant Ligament with Combined Osteointegration and Energy-Dissipation by J. Hou, Z. Xiao, Z. Liu, H. Zhao, Y. Zhu, L. Guo, Z. Zhang, R. O. Ritchie, Y. Wei and X. Deng, Advanced Materials, vol. 33 (45), Nov. 2021, art. 2103727 (doi: 10.1002/adma.202103727)

• Manipulating Internal Flow Units Toward Favorable Plasticity in Zr-Based Bulk-Metallic Glasses by Hydrogenation by F. Dong, Y. Chu, M. He, Y. Zhang, W. Li, P. K. Liaw, B. Wag, L. Luo, Y. Su, R. O. Ritchie and X. Yuan, Journal of Materials Science & Technology, vol. 102, March 10, 2022, pp. 36-45 (doi: 10.1016/j.jmst.2021.04.037)

• Bone Manganese is a Sensitive Biomarker of Ongoing Elevated Manganese Exposure, But Does Not Accumulate Across the Lifespan T. E. Conley, C. Richardson, J. Pacheco, N. Dave, T. Jursa, S. Guazzetti, R. G. Lucchini, S. Fendorf, R. O. Ritchie, and D. R. Smith, Environmental Research, vol. 204, part D, March 2022, art. 112355 (doi: 10.1016/j.envres.2021.112355)

• Flaw-Insensitive Fracture of a Micrometer-Sized Brittle Metallic Glass by R. Qu, R. Maaß, Z. Liu, D. Tönnies, L. Tian, R.O. Ritchie, Z. Zhang and C.A. Volkert, Acta Materialia, vol. 218, Oct. 1, 2021, art. 117219 (doi: 10.1016/j.actamat.2021.117219)

• Cryoforged Nanotwinned Titanium with Ultrahigh Strength and Ductility by S. Zhao, R. Zhang, Q. Yu, J. Ell, R. O. Ritchie and A. M. Minor, Science, vol. 373 (6561), 2021, pp. 1363-1368 (doi: 10.1126/science.abe7252)

• Dual-Gradient Structure Leads to Optimized Combination of High Fracture Resistance and Strength-Ductility Synergy with Minimized Final Catastrophic Failure by R. Cao, Q. Yu, Y. Li and R. O. Ritchie, Journal of Materials Research & Technology, vol. 15, 2021 pp. 901-910 (doi: 10.1016/j.jmrt.2021.08.102)

• Dissipative Dual-Phase Mechanical Metamaterial Composites via Architectural Design by W. Guo, Y. Huang, R. O. Ritchie and S. Yin, Extreme Mechanics Letters, vol. 48, Oct. 2021, art. 101442 (doi: 10.1016/j.eml.2021.101442)

• Full-Field Characterisation of Oxide-Oxide Ceramic-Matrix Composites using X-ray Computed Micro-Tomography and Digital Volume Correlation under Load at High Temperatures by J. P. Forna-Kreutzera, J. Ell, H. Barnard, T. Pirzada, R. O. Ritchie and D. Liu, Materials and Design, vol. 208, Oct. 2021, art. 109899 (doi: 10.1016/j.matdes.2021.109899)

• Bioinspired Fish-Scale-Like Magnesium Composites Strengthened by Contextures of Continuous Titanium Fibers: Lessons from Nature by Y. Liu, Q. Yu, G. Tan, M. Zhang, E. Tang, S. Wang, Z. Liu, Q. Wang, Z. Zhang and R. O. Ritchie, Journal of Magnesium & Alloys, published online, July 26, 2021 (doi: 10.1016/j.jma.2021.06.023)

• Hydration-Induced Reversible Deformation of the Pine Cone by H. Quan, A. Pirosa, W. Yang, R. O. Ritchie and M. A. Meyers, Acta Biomaterialia, vol. 128, July 1, 2021, pp. 370-383 (doi: 10.1016/j.actbio.2021.04.049)

• Compression Fatigue Properties and Damage Mechanisms of a Bioinspired Nacre-Like Ceramic-Polymer Composite by G. Tan, Q. Yu, Z. Liu, X. Wang, M. Zhang, Y. Liu, Z. Zhang and R. O. Ritchie, Scripta Materialia, vol. 203, 2021, art.# 114089 (doi: 10.1016/j.scriptamat.2021.114089)

• Toughening Materials: Enhancing Resistance to Fracture by R. O. Ritchie, Philosophical Transactions of the Royal Society A, vol. 379, June 2021, art. 20200437 (doi: 10.1098/rsta.2020.0437)

• In Situ Observation of the Deformation and Fracture of an Alumina-Alumina Ceramic-Matrix Composite at Elevated Temperature using X-Ray Computed Tomography by T. J. Pirzada, D. Liu, J. Ell, H. Barnard, I. Šulák, M. Galano, T. J. Marrow and R. O. Ritchie, Journal of the European Ceramic Society, vol. 41 (7), July 2021, pp. 4217-4230. (doi: 10.1016/j.jeurceramsoc.2021.01.030)

• Bioinspired Tungsten-Copper Composites with Bouligand-Type Architectures Mimicking Fish Scales by Y. Zhang, G. Tan, M. Zhang, Q. Yu, Z. Liu, Y. Liu, J. Zhang, D. Jiao, F. Wang, L. Zhuo, Z. Zhang and R. O. Ritchie, Journal of Materials Science and Technology, vol. 96, 2022, pp. 21-30 (doi: 10.1016/j.jmst.2021.04.022)

• Impact of Hydration on the Mechanical Properties and Damage Mechanisms of Natural Silk Fibre Reinforced Composites by W. Tian, K. Yang, S. Wu, J. Yang, H. Luo, R. O. Ritchie and J. Guan, Composites A, vol. 147, 2021, art.# 106458 (doi: 10.1016/j.compositesa.2021.106458)

• Near Complete Depolymerization of Polyesters with Nano-Dispersed Enzymes by C. DelRe, Y. Jiang, P. Kang, J. Kwon, A. Hall, I. Jayapurna, Z. Ruan, L. Ma, K. Zolkin, T. Li, C. D. Scown, R. O. Ritchie, T. P. Russell and T. Xu, Nature, vol. 592, April 22, 2021, pp. 558-563 (doi: 10.1038/s41586-021-03408-3)

• Universal Nature of the Saddle States of Structural Excitations in Metallic Glasses by J. Ding, L. Li, N. Wang, L. Tian, M. Asta, R. O. Ritchie and T. Egami, Materials Today Physics, vol.17, March 2021, 100359 (doi: 10.1016/j.mtphys.2021.100359)

• Compressive Properties of 3-D Printed Mg-NiTi Interpenetrating-Phase Composite: Effects of Strain Rate and Temperature by M. Zhang, Q. Yu, Z. Liu, J. Zhang, D. Jiao, S. Li, H. Peng, Q. Wang, Z. Zhang and R. O. Ritchie, Composites B, vol. 215, 2021, p. 108783. (doi: 10.1016/j.compositesb.2021.108783)

• Magnetically Driven Short-Range Order as an Explanation for Anomalous Measurements in CrCoNi by F. Walsh, M. Asta and R. O. Ritchie, Proceedings of the National Academy of Sciences, vol. 118 (13), 2021, e2020540118 (doi: 10.1073/pnas.2020540118)

• Strong and Tough Bioinspired Additive-Manufactured Dual-Phase Mechanical Metamaterial Composites by S. Yin, W. Guo, H. Wang, Y. Huang, R. Yang, Z. Hu, D. Chen, J. Xu and R. O. Ritchie, Journal of the Mechanics and Physics of Solids, vol. 149, April 2021, p. 104341 (doi: 10.1016/j.jmps.2021.104341)

• Amorphization in Extreme Deformation of the CrMnFeCoNi High-Entropy Alloy by S. Zhao, Z. Li, C. Zhu, W. Yang, Z. Zhang, D. E. J. Armstrong, P. S. Grant, R. O. Ritchie and M. A. Meyers, Science Advances, vol. 7 (5), Jan. 29, 2021, p. eabb3108 (doi: 10.1126/sciadv.abb3108)

• Architected Cellular Materials: A Review on their Mechanical Properties towards Fatigue-Tolerant Design and Fabrication by M. Benedetti, A. du Plessis, R. O. Ritchie, M. Dallago, S. M. J. Razavi and F. Berto, Materials Science and Engineering R, vol.144, Jan. 2021, p. 100606, (doi: 10.1016/j.mser.2021.100606)

• Collagen Fiber Orientation is Coupled with Specific Nano-Compositional Patterns in Dark and Bright Osteons Modulating their Biomechanical Properties by K. E. Stockhausen, M. Qwamizadeh, E. M. Wölfel, H. Hemmatian, I. A. K. Fiedler, S. Flenner, E. Longo, M. Amling, I. Greving R. O. Ritchie, F. N. Schmidt and B. Busse, ACS Nano, vol. 15 (1), Jan. 6, 2021, pp. 455-467 (doi: 10.1021/acsnano.0c04786)

• Modeling the Hydrogen Effect on the Constitutive Response of a Low Carbon Steel in Cyclic Loading by Z. S. Hosseini, M. Dadfarnia, A. Nagao, M. Kubota, B. P. Somerday, R. O. Ritchie and P. Sofronis, Journal of Applied Mechanics, vol 88 (3), March 2021, p. 031001, (doi: 10.1115/1.4049076)

• Offering Toughness and Protection, Arapaima Scales Provide Effective Defense Against Predation by M. A. Meyers and R. O. Ritchie, Matter, vol. 3 (6), Dec. 2, 2020, pp. 1979-1980, (doi: 10.1016/j.matt.2020.10.029)

• On the Gular Sac Tissue of the Brown Pelican: Structural Characterization and Mechanical Properties by S. Dike, W. Yang, A. Pissarenko, H. Quan, F. C. Garcia Filho, R. O. Ritchie and M. A. Meyers, Acta Biomaterialia, vol. 118, Dec., 2020, pp. 161-181, (doi: 10.1016/j.actbio.2020.10.008)

• The Role of Collagen in the Dermal Armor of the Boxfish by S. N. Garner, S. E. Naleway, M. S. Hosseini, C. Acevedo, B. Gludovatz, E. Schaible, J.-Y. Jung, R. O. Ritchie, P. Zavattieri and J. McKittrick, Journal of Materials Research and Technology, vol. 9 (6), Nov.-Dec. 2020, pp. 13825-13841, (doi: 10.1016/j.jmrt.2020.09.090)

• Active Defense Mechanisms of Thorny Catfish by H. Quan, W. Yang, Z. Tang, R. O. Ritchie and M. A. Meyers, Materials Today, vol. 28, Sept. 2020, pp. 35-48, (doi: 10.1016/j.mattod.2020.04.028)

• Nacre Toughening due to Cooperative Plastic Deformation of Stacks of Co-Oriented Aragonite Platelets by H.-C. Loh, T. Divoux, B. Gludovatz, P. U. P. A. Gilbert, R. O. Ritchie, F.-J. Ulm and A. Masic, Communications Materials, vol. 1, Oct. 28, 2020, p. 77, (doi: 10.1038/s43246-020-00078-y)

• Heterostructured Materials: Superior Properties from Hetero-Zone Interaction by Y. Zhu, K. Ameyama, P. Anderson, I. Beyerlein, H. Gao, H. S. Kim, E. Lavernia, S. Mathaudhu, H. Mughrabi, R. O. Ritchie, N. Tsuji, X. Zhang and X. Wu, Materials Research Letters, vol. 9 (1), 2021, pp. 1-31, (doi: 10.1080/21663831.2020.1796836)

• Effects of Cryogenic Temperature and Grain Size on Fatigue-Crack Propagation in the Medium-Entropy CrCoNi Alloy by J. Rackwitz, Q. Yu, Y. Yang, G. Laplanche, E. P. George, A. M. Minor and R. O. Ritchie, Acta Materialia, vol. 200, Nov. 2020, pp. 351-365, (doi: 10.1016/j.actamat.2020.09.021)

• Structure and Mechanical Adaptability of a Modern Elasmoid Fish Scale from the Common Carp by H. Quan, W. Yang, M. Lapeyriere, E. Schaible, R. O. Ritchie and M. A. Meyers, Matter, vol. 3 (3), Sept. 2, 2020, pp. 842-863, (doi: 10.1016/j.matt.2020.05.011)

• Optimizing the Microstructures and Mechanical Properties of Al-Cu-based Alloys with Large Solidification Intervals by Coupling Travelling Magnetic Fields with Sequential Solidification by L. Luo, L. S. Luo, R. O. Ritchie, Y. Q. Su, B. B. Wang, L. Wang, R. Chen, J. J. Guo and H. Z. Fu, Journal of Materials Science and Technology, vol. 61, 2021, pp. 100-113, (doi: 10.1016/j.jmst.2020.05.048)

• Annealed Microstructure Dependent Corrosion Behavior of Ti-6Al-3Nb-2Zr-1Mo Alloy by B. Su, L. Luo, B. Wang, Y. Su, L. Wang, R. O. Ritchie, E. Guo, T. Li, H. Yang, H. Huang, J. Guo and H. Fu, Journal of Materials Science and Technology, vol. 62, 2021, pp. 234-238, (doi: 10.1016/j.jmst.2020.05.058)

• The Influence of Mean Strain on the High-Cycle Fatigue of Nitinol with Application to Medical Devices by H. Cao, M. H. Wu, F. Zhou, R. M. McMeeking and R. O. Ritchie, Journal of the Mechanics and Physics of Solids, vol. 143, 2020, p. 104057, (doi: 10.1016/j.jmps.2020.104057)

• Mechanical Properties and Toughening Mechanisms of Natural Silkworm Silks and their Composites by K. Yang, J. Guan, Z. Z. Shao and R. O. Ritchie, Journal of the Mechanical Behavior of Biomedical Materials, vol. 110, 2020, p. 103942, (doi: 10.1016/j.jmbbm.2020.103942)

• Ab Initio Modeling of the Energy Landscape for Screw Dislocations in Body-Centered Cubic High-Entropy Alloys by S. Yin, J. Ding, M. Asta and R. O. Ritchie, npj Computational Materials, vol. 6, July 29, 2020, p. 110, (doi: 10.1038/s41524-020-00377-5)

• Tough Nature-Inspired Helicoidal Composites with Printing Induced Voids by S. Yin, H. Chen, R. Yang, Q. He, D. Chen, L. Ye, Y-W. Mai, J. Xu and R. O. Ritchie, Cell Reports Physical Science, vol. 1 (7), July 22, 2020, p. 100109, (doi: 10.1016/j.xcrp.2020.100109)

• Long-Term Immobilization in Elderly Females Causes a Specific Pattern of Cortical Bone and Osteocyte Deterioration Different from Postmenopausal Osteoporosis by T. Rolvien, P. Milovanovic, F. N Schmidt, S. von Kroge, E M. Wölfel, M. Krause, B. Wulff, K. Püschel, R. O. Ritchie, M. Amling and B. Busse, Journal of Bone and Mineral Research, vol. 35 (7), July 2020, pp. 1343-1351, (doi: 10.1002/jbmr.3970)

• On the Strength of Hair Across Species by W. Yang, Y. Yu, R. O. Ritchie, M. A. Meyers, Matter, vol. 2, Jan. 8, 2020, pp. 136-1493, (doi: 10.1016/j.matt.2019.09.019)

• Making Ultrastrong Steel Tough by Grain-Boundary Delamination by L. Liu, Q. Yu, Z. Wang, J. Ell, M. X. Huang and R. O. Ritchie, Science, published online May 7, 2020, eaeb 9413, (doi: 10.1126/science.aba9413)

• On the Impact Toughness of Gradient-Structured Metals by Y. Lin, Q. Yu, J. Pan, F. Duan, R. O. Ritchie and Yi Li, Acta Materialia, vol. 193, July 2020, pp. 125-137, (doi: 10.1016/j.actamat.2020.04.027)

• Verification of Short-Range Order and Its Impact on the CrCoNi Medium Entropy Alloy by R. Zhang, S. Zhao, J. Ding, Y. Chong, T. Jia, C. Ophus, M. Asta, R. O. Ritchie and A. M. Minor, Nature, , vol. 581 (7808), May 22, 2020, pp. 283-287, (doi: 10.1038/s41586-020-2275-z)

• 3-D Printed Mg-NiTi Interpenetrating-Phase Composites with High Strength, Damping Capacity and Energy Absorption Efficiency by M. Y. Zhang, Q. Yu, Z. F. Liu, G. Tan, D. Jiao, W. Zhu, S. Li, Z. F. Zhang, R. Yang and R. O. Ritchie, Science Advances, vol. 6 (19), May 8, 2020, p. eaba5581, (doi: doi.org/10.1126/sciadv.aba5581)

• Compressive Ductility and Fracture Resistance in CuZr-Based Shape-Memory Metallic-Glass Composites by X. Fu, G. Wang, Y. Wu, W. L. Song, C. H. Shek, Y. Zhang, J. Sheng and R. O. Ritchie, International Journal of Plasticity, vol. 128, May 2020, p. 102687, (doi: doi.org/10.1016/j.ijplas.2020.102687)

• On the Exceptional Damage-Tolerance of Gradient Metallic Materials by R. Cao, Q. Yu, J. Pan, Y. Lin, A. Sweet, Y. Li and R. O. Ritchie, Materials Today, vol. 32, Jan.-Feb. 2020, pp. 94-107, (doi: 10.1016/j.mattod.2019.09.023)

• Ice-Templated Porous Tungsten and Tungsten Carbide Inspired by Natural Wood by Y. Zhang, G. Tan, D. Jiao, J. Zhang, S. Wang, F. Liu, Z. Liu, L. Zhuo, Z. Zhang, S. Deville and R. O. Ritchie, Journal of Materials Science and Technology, , vol. 45, May 15, 2020, pp. 187-197, (doi: 10.1016/j.jmst.2019.10.021)

• Real Time Nanoscale Observations of Ultrahigh Strain Hardening Originating from the TRIP effect in a Dual-Phase CrMnFeCoNi High-Entropy Alloy by S. Chen, H. S. Oh, B. Gludovatz, S. J. Kim, E. S. Park, Z. Zhang, R. O. Ritchie and Q. Yu, Nature Communications, vol. 11, Feb. 11, 2020, p. 826, (doi: 10.1038/s41467-020-14641-1)

• Scalable Electrically Conductive Spray Coating Based on Block Copolymer Nanocomposites by J. Kwon, K. Evans, L. Ma, D. Arnold, M. E. Yildizdag, T. I. Zohdi, R. O. Ritchie and T. Xu, ACS Applied Nano Materials, vol. 12 (7), Jan. 22, 2020, pp. 8687-8694, (doi: 10.1021/acsami.9b20817)

• Multi Step Crystallization of Self-Organized Spiral Eutectics by S. Moniri, H. Bale, T. Volkenandt, Y. Wang, J. Gao, T. Lu, K. Sun, R. O. Ritchie and A. J. Shahani, Small, vol. 16 (8), Feb. 19, 2020, (doi: 10.1002/smll.201906146)

• Structural Orientation and Anisotropy in Biological Materials: Functional Designs and Mechanics by Z. Liu, Z. Zhang and R. O. Ritchie, Advanced Functional Materials, vol. 30 (10), Jan. 3, 2020, p. 1908121 (doi: 10.1002/adfm.201908121)

• X-Ray Tomography of the Crushing Strength and Irradiation Behaviour of Dedicated Tristructural Isotropic Nuclear Fuel Particles at 1000°C by D. Liu, S. Knol, J. Ell, H. Barnard, M. Davies, J. A. Vreeling and R. O. Ritchie, Materials and Design, vol. 187, Feb. 2020, p. 108382, (doi: 10.1016/j.matdes.2019.108382)

• Interfacial Toughening Effect of Suture Structures by Z. Liu, Z. Zhang and R. O. Ritchie, Acta Biomaterialia, vol. 102, Jan. 15, 2020, pp. 75-82, (doi: 10.1016/j.actbio.2019.11.034)

• Architecture of High-Strength Aluminum-Matrix Composites Processed by a Novel Microcasting Technique by C. W. Shao, S. Zhao, X. G. Wang, Y. K. Zhu, Z. Zhang and R. O. Ritchie, npg Asia Materials, vol. 11 (1), Nov. 29, 2019, p. 69, (doi: 10.1038/s41427-019-0174-2)

• On the Strength of Hair Across Species by W. Yang, Y. Yu, R. O. Ritchie, M. A. Meyers, Matter, vol. 2, Jan. 8, 2020, (doi: 10.1016/j.matt.2019.09.019)

• Nanoparticle Additions Promote Outstanding Fracture Toughness and Fatigue Strength in a Cast Al-Cu Alloy by C. Yang, Q. Zhao, Z. Zhang, L. Li, W. Tian, R. Liu, P. Zhang, Y. Xu, Y. Li, Z. Zhang, Q. Jiang and R. O. Ritchie, Materials and Design, vol. 186, Jan. 15, 2020, p. 108211, (doi: 10.1016/j.matdes.2019.108221)

• Intrinsic Toughness of the Bulk-Metallic Glass Vitreloy 105 Measured Using Micro-Cantilever Beams by D. Sorensen, E. Hintsala, J. Stevick, J. Pischlar, B. Li, D. Kiener, J. C. Myers, H. Jin, J. Liu, D. Stauffer, A. J. Ramirez and R. O. Ritchie, Acta Materialia, vol. 183, Jan. 2020, pp. 242-248, (doi: 10.1038/s41586-019-1617-1)

• Tuning element distribution, structure and properties by composition in high-entropy alloy by Q. Ding, Y. Zhang, X. Chen, X. Fu, D. Chen, S. Chen, L. Gu, F. Wei, H. Bei, Y. Gao, M. Wen, J. Li, Z. Zhang, T. Zhu, R. O. Ritchie and Q. Yu, Nature, vol. 574 (7777), Oct. 10, 2019, pp. 223-227, (doi: 10.1038/s41586-019-1617-1)

• Nature-Inspired Nacre-Like Composites Combining Human Tooth-Matching Elasticity and Hardness with Exceptional Damage-Tolerance by G. Tan, J. Zhang, L. Zheng, D. Jiao, Z. Liu, Z. Zhang and R. O. Ritchie, Advanced Materials, vol. 31, p. 201904643, 2019, (doi: 10.1002/adma.201904603)

• Integration of Tough Wild Antheraea Pernyi Silk and Strong Carbon Fibres for Impact-Critical Structural Composites by K. Yang, J. Guan, K. Numata, C. Wu, S. Wu, Z. Shao and R. O. Ritchie, Nature Communications, vol. 10, Aug. 2019, p. 3786, (doi: 10.1038/s41467-019-11520-2)

• Arapaima Fish Scale: One of the Toughest Flexible Biological Materials by W. Yang, H. Quan, M. A. Meyers and R. O. Ritchie, Matter, vol. 1, Dec. 4, 2019 pp. 1557-1566, (doi: 10.1016/j.matt.2019.09.014)

• Synthesis of Bioinspired Ice-Templated Bulk Metallic Glass-Alumina Composites with Intertwined Dendritic Structure by J.-I. Lee, A. Wat, J. Y. Kim, C. W. Ryu, H. J. Chang, E. S. Park and R. O. Ritchie, Scripta Materialia, vol. 172, Nov. 2019, pp. 159-164, (doi: 10.1016/j.scriptamat.2019.07.023)

• Mechanical Competence and Bone Quality Develop during Skeletal Growth by E. A. Zimmermann, C. Riedel, K. Stockhausen, Y. Chushkin, E. Schaible, F. Schmidt, B. Gludovatz, E. Vettorazzi, F. Zontone, K. Püschel, M. Amling, R. O. Ritchie and B. Busse, Journal of Bone and Mineral Research, , vol. 34 (8), August, 2019, pp. 1461-1472 (doi: 10.1002/jbmr.3730)

• Bioinspired Nacre-like Alumina with a Metallic Nickel Compliant-Phase Fabricated by Spark-Plasma Sintering by A. Wat, C. Ferraro, Xu Deng, A. J. Sweet, A. P. Tomsia, E. Saiz and R. O. Ritchie, Small, vol. 15 (31), August, 2019, p.190573 (doi: 10.1002/smll.201900573)

• Hyperelastic Phase-Field Fracture Mechanics Modeling of the Toughening Induced by Bouligand Structures in Natural Materials by S. Yin, W. Yang, J. Kwon, A. Wat, M. A. Meyers, R. O. Ritchie, Journal of the Mechanics and Physics of Solids, vol. 131, 2019, pp. 204-220, (doi: 10.1016/j.jmps.2019.07.001)

• Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs by W. Huang, D. Restrepo, P. Zavattier, J.-Y. Jung, F. Y. Su, Z. Liu, R. O. Ritchie, J. McKittrick and D. Kisailus, Advanced Materials, vol. 31 (43) 2019, p. 1901561, (doi: 10.1002/adma.201901561)

• On the Origins of Fracture Toughness in Advanced Teleosts: How the Swordfish Sword’s Bone Structure and Composition Allow for Slashing under Water to Kill or Stun Prey by F. N. Schmidt, E. A. Zimmermann, F. Walsh, C. Plumeyer, E. Schaible, I. A. K. Fiedler, P. Milovanovic, M. Rößle, M. Amling, C. Blanchet, B. Gludovatz, R. O. Ritchie and B. Busse, Advanced Science, vol. 6 (12), June, 2019, p. 1970072, (doi: 10.1002/advs.201970072)

• Helical Van Der Waals Crystals with Discretized Eshelby Twist by Y. Liu, J. Wang, S. J. Kim, H. Sun, F. Yang, Z. Fang, N. Tamura, R. Zhang, X. Song, J. Wen, B. Xu, M. Wang, S. Lin, Q. Yu, K. Tom, Y. Deng, S. Yan, J. Turner, E. Chan, D. Jin, R. O. Ritchie, A. Minor, D. Chrzan, M. Scott and J. Yao, Nature, vol. 570 (7761), June, 2019, pp. 358-364, (doi: 10.1038/s41586-019-1308-y)

• High-Entropy Alloys by E. P. George, D. Raabe and R. O. Ritchie, Nature Reviews Materials, June, 2019, (doi: 10.1038/s41578-019-0121-4)

• Mechanical Competence and Bone Quality Develop during Skeletal Growth by E. A. Zimmermann, C. Riedel, K. Stockhausen, Y. Chushkin, E. Schaible, F. Schmidt, B. Gludovatz, E. Vettorazzi, F. Zontone, K. Püschel, M. Amling, R. O. Ritchie and B. Busse, Journal of Bone and Mineral Research, 2019, (doi: 10.1002/jbmr.3730)

• Direct Measurement of Nanostructural Change During In Situ Deformation of a Bulk Metallic Glass by T. C. Pekin, J. Ding, C. Gammer, V. B. Ozdol, C. Ophus, M. Asta, R. O. Ritchie and A. M. Minor, Nature Communications, vol. 10, June, 2019, p. 2445, (doi: 10.1038/s41467-019-10416-5)

• Temperature and Load-Ratio Dependent Fatigue-Crack Growth in the CrMnFeCoNi High-Entropy Alloy by K. V. S. Thurston, B. Gludovatz, Q. Yu, G. Laplanche, E. P. George and R. O. Ritchie, Journal Alloys and Compounds, vol. 794, 2019, pp. 523-533, (doi: 10.1016/j.jallcom.2019.04.234)

• On the Onset of Deformation Twinning in the CrFeMnCoNi High-Entropy Alloy using a Novel Tensile Specimen Geometry by K. V. S. Thurston, A. Hohenwarter, G. Laplanche, E. P. George, B. Gludovatz and R. O. Ritchie, Intermetallics, vol. 110, 2019, p. 106469, (doi: 10.1016/j.intermet.2019.04012)

• A Natural Energy Absorbent Polymer Composite: The Equine Hoof Wall by W. Huang, N. Yaraghi, W. Yang, A. Velazquez-Olivera, Z. Li, R. O. Ritchie, D. Kisailus, S. M. Stover and J. McKittrick, Acta Biomaterialia, vol. 90, 2019, pp. 267-277, (doi: 10.1016/j.actbio.2019.04.003)

• Structural Origins for the Generation of Strength, Ductility and Toughness in Bulk-Metallic Glasses using Hydrogen Microalloying by L. S. Luo, B. B. Wang, F. Y. Dong, Y. Q. Su, E. Y. Guo, M. Y. Wang, L. Wang, J. X. Yu, R. O. Ritchie, J. J. Guo and H. Z. Fu, Acta Materialia, vol. 171, 2019, pp. 216-230, (doi: 10.1016/j.actamat.2019.04.022)

• Strong, Fracture-Resistant Biomimetic Silicon Carbide Composites with Laminated Interwoven Nanoarchitectures Inspired by the Crustacean Exoskeleton by M. Zhang, D. Jiao, G. Tan, J. Zhang, S. Wang, J. Wang, Z. Liu, Z. Zhang and R. O. Ritchie, ACS Applied Nano Materials, vol. 2 (2), 2019, pp. 1111-1119, (doi: 10.1021/acsanm.9b00063)

• On the Characterisation of the Interfacial Toughness in a Novel “GaN-on-Diamond” Material for High-Power RF devices by D. Liu, T. Fabes, B.-S. Li, D. Francis, R. O. Ritchie and M. Kuball, ACS Applied Electronic Materials, vol. 1 (3), 2019, pp. 354-369, (doi: 10.1021/acsaelm.8b00091)

• Real-time Cryo-Transmission Electron Microscopy Observations of Deformation Mechanisms in CrCoNi-Based Medium/High-Entropy Alloys at Cryogenic Temperatures by Q. Ding, X. Fu, D. Chen, H. Bei, B. Gludovatz, J. Li, Z. Zhang, E. P. George, Q. Yu, T. Zhu and R. O. Ritchie, Materials Today, vol. 25, 2019, pp. 21-27, (doi: 10.1016/j.mattod.2019.03.001)

• Predicting Surface Deformation during Mechanical Attrition of Metallic Alloys by S. C. Cao, X. Zhang, Y. Wang, F. Cheng, S.-Q. Shi, J. Lu and R. O. Ritchie, npj Computational Materials,vol. 5, 2019, p. 36.(doi: 10.1038/s41524-019-0171-6)

• Light but Tough Bio-Inherited Materials: Luffa Sponge Based Nickel-Plated Composites by S. Yin, H. Wang, J. Li, R. O. Ritchie and J. Xu, Journal of the Mechanical Behavior of Biomedical Materials,vol. 94, 2019, pp. 10-18.(doi: 10.1016/j.jmbbm.2019.02.029)

• Facile Self-Assembly Synthesis of γ-Fe2O3/Graphene Oxide for Enhanced Photo-Fenton Reaction by F. Wang, X. Yu, M. Ge, S. Wu, J. Guan, J. Tang, X. Wu and R. O. Ritchie, Environmental Pollution,vol. 248, 2019, pp. 229-237.(doi: 10.1016/j.envpol.2019.01.0182)

• Bioinspired “Nacre-Like” Alumina/Bulk-Metallic Glass Ceramics by A. Wat, J. I. Lee, C. W. Ryu, B. Gludovatz, J. Y. Kim, A. P. Tomsia, T. Ishikawa, J. Schmitz, A. Meyer, M. Alfreider, D. Kiener, E. S. Park and R. O. Ritchie, Nature Communications, vol. 10, 2019, p. 961.(doi: 10.1038/s41467-019-08753-6)

• Structural Architectures with Toughening Mechanisms in Nature: A Review of the Materials Science of Type-I Collagenous Materials by W. Yang, M. A. Meyers and R. O Ritchie, Progress in Materials Science,vol. 103, 2019, pp. 425-483.(doi: 10.1016/j.pmatsci.2019.01.002)

• Mechanical Properties of High-Entropy Alloys with Emphasis on Face-Centered Cubic Alloys by Z. Li, S. Zhao, R. O. Ritchie and M. A. Meyers, Progress in Materials Science,vol. 102, 2019, pp. 296-345.(doi: 10.1016/j.pmatsci.2018.12.003)

• Adaptive Structural Reorientation: Developing Extraordinary Mechanical Properties by Constrained Flexibility in Natural Materials by Z. Liu, Y. Zhang, M. Zhang, G. Tan, Y. Zhu, Z. Zhang and R. O. Ritchie, Acta Biomaterialia, vol. 86, 2019 pp. 96-198.(doi: 10.1016/j.actbio.2019.01.010)

• Mechanical Properties and Impact Performances of Silk-Epoxy Resin Composites Modulated by Flax Fibres by C. Wu, K. Yang, Y. Gu, J. Xu, R. O. Ritchie and J. Guan, Composites: Part A, vol. 17, Feb. 2019, pp. 357-368. (doi: 10.1016/j.compositesa.2018.12.003)

• Hydration-Induced Nano- to Micro-Scale Self-Recovery of the Tooth Enamel of the Giant Panda by Z. Liu, Z. Weng, Z.-F. Zhai, N. Huang, Z.-J. Zhang, J. Tan, C. Jiang, D. Jiao, G. Tan, J. Zhang, X. Jiang, Z. Zhang and R. O. Ritchie, Acta Biomaterialia, vol. 81, 2018, pp. 267-277. (doi: 10.1016/j.actbio.2018.09.053)

• Design and Strengthening Mechanisms in Hierarchical Architected Materials Processed using Additive Manufacturing by S. Yin, J. Li, H. Chen, R. O. Ritchie and J. Xu, International Journal of Mechanical Sciences, vol. 149, 2018, pp. 150-163. (doi: 10.1016/j.ijmecsci.2018.09.038)

• Fracture Toughness of Ultra-High Molecular Weight Polyethylene: A Basis for Defining the Crack-Initiation Toughness in Polymers by L. G. Malito, J. V. Sov, B. Gludovatz, R. O. Ritchie and L. A. Pruitt, Journal of the Mechanics and Physics of Solids, vol. 122, 2019, pp. 435-449. (doi: 10.1016/j.jmps.2018.09.022)

• Novel Defense Mechanisms in the Armor of the Scales of the “Living Fossil” Coelacanth Fish by H. Quan, W. Yang, E. Schaible, R. O. Ritchie and M. A. Meyers, Advanced Functional Materials, vol. 28 (46), 2018, p. 1804237. (doi: 10.1002/adfm.201804237)

• Tunable Stacking Fault Energies by Tailoring Local Chemical Order in CrCoNi Medium-Entropy Alloys by J. Ding, Q. Yu, M. Asta and R. O. Ritchie, Proceedings of the National Academy of Sciences (PNAS), vol. 115 (36), 2018, pp. 8919-8924. (doi: 10.1073/pnas.1808660115)

• Melts of CrCoNi-Based High-Entropy Alloys: Atomic Diffusion and Electronic/Atomic Structure from Ab Initio Simulation by J. Ding, M. Asta and R. O. Ritchie, Applied Physics Letters, vol. 113 (11), 2018, p. 111902. (doi: 10.1063/1.5045216)

• High-Temperature Damage-Tolerance of Coextruded, Bioinspired (“Nacre-Like”), Alumina/Nickel Compliant-Phase Ceramics by R. P. Wilkerson, B. Gludovatz, J. Ell, J. Watts, G. E. Hilmas and R. O. Ritchie, Scripta Materialia, vol. 158, 2019, pp. 110-115. (doi: 10.1016/j.scriptamat.2018.08.046)

• On the Theoretical Modeling of Fatigue Crack Growth by Z. S. Hosseini, M. Dadfarnia, B. P. Somerday, P. Sofronis and R. O. Ritchie, Journal of the Mechanics and Physics of Solids, vol. 121, 2018, pp. 341-362. (doi: 10.1016/j.jmps.2018.07.026)

• On the Materials Science of Nature’s Arms Race by Z. Liu, Z. Zhang and R. O. Ritchie, Advanced Materials, vol. 30 (32), 2018, p. 1705220. (doi: 10.1002/adma.201705220)

• Nanometer-Scale Gradient Atomic Packing Structure Surrounding Soft Spots in Metallic Glasses by B. Wang, L. Luo, E. Guo, Y. Su, M. Wang, R. O. Ritchie, F. Y. Dong, L. Wang, J. J. Guo and H. Fu, , npj Computational Materials, vol. 4, 2018, p. 41. (doi: 10.1038/s41524-018-0097-4)

• Synchrotron X-ray Micro-Tomography at the Advanced Light Source: Developments in In-Situ Mechanical Testing by H. S. Barnard, A. A. MacDowell, D. Y. Parkinson, P. Mandal, M. Czabaj, Y. Gao, E. Maillet, B. Blank, N. M. Larson, R. O. Ritchie, B. Gludovatz, C. Acevedo and D. Liu, Journal of Physics, Conf. Series 849, 2017, pp. 012043. (doi: 10.1088/1742-6596/849/1/012043)

• Spatial Correlation of Elastic Heterogeneity Tunes the Deformation Behavior of Metallic Glasses by N. Wang, J. Ding, F. Yan, M. Asta, R. O. Ritchie and L. Li, npj Computational Materials, vol. 4, 2018, pp. 19. (doi: 10.1038/s41524-018-0077-8)

• Nature-Inspired Hierarchical Steels by S. C. Cao, J. Liu, L. Zhu, L. Li, M. Dao, J. Lu and R. O. Ritchie, Scientific Reports, vol. 8, 2018, pp. 5088. (doi: 10.1038/s41598-018-23358-7)

• Microscopic Mechanisms of Deformation Transfer in High Dynamic Range Branched Nanoparticle Deformation Sensors by S. N. Raja, X. Ye, M. R. Jones, L. Lin, S. Govindjee and R. O. Ritchie, Nature Communications, vol. 9, 2018, pp. 1155-1164. (doi: 10.1038/s41467-018-03396-5)

• Contributions of Material Properties and Structure to Bone Fragility in the UCD-T2DM Rat Model of Type 2 Diabetes by C. Acevedo, M. Sylvia, E. Schaible, J. L. Graham, L. N. Metz, B. Gludovatz, A. V. Schwartz, R. O. Ritchie, T. N. Alliston, P. J. Havel and A. J. Fields, Journal of Bone and Mineral Research, 2018. (doi: 10.1002/jbmr.3393)

• A Study of Size Effects in Bioinspired, “Nacre-Like”, Metal-Compliant-Phase (Nickel-Alumina) Coextruded Ceramics by R. P. Wilkerson, B. Gludovatz, J. Watts, A. P. Tomsia, G. E. Hilmas and R. O. Ritchie, Acta Materialia, vol. 148, 2018, pp. 147-155.

• Fatigue as the Missing Link between Bone Fragility and Fracture by C. Acevedo, V. Stadelmann, D. Pioletti, T. Alliston and R. O. Ritchie, Nature Biomedical Engineering, vol. 2, 2018, pp. 62-71. (doi: 10.1038/s41551-017-0183-9)

• Increasing M2(dobdc) Loading in Selective Mixed-Matrix Membranes: A Rubber Toughening Approach by Z. P. Smith, J. E. Bachman, T. Li, B. Gludovatz, V. A. Kusuma, T. Xu, D. P. Hopkinson, R. O. Ritchie and J. R. Long, Chemistry of Materials, vol. 30 (5), 2018, pp. 1484-1495. (doi: 10.1021/acs.chemmater.7b02908)

• Hydrogen-Enhanced-Plasticity Mediated Decohesion for Hydrogen-Induced Intergranular and “Quasi-Cleavage” Fracture of Lath Martensitic Steels by A. Nagao, M. Dadfarnia, B. P. Somerday, P. Sofronis and R. O. Ritchie, Journal of Mechanics and Physics of Solids, vol. 112, 2018, pp. 403-430.

• Electrically Reversible Cracks in an Intermetallic Film Controlled by an Electric Field by Z. Q. Liu, J. H. Liu, M. D. Biegalski, J.-M. Hu, S. L. Shang, Y. Ji, J. M. Wang, S.-L. Hsu, A. T. Wong, M. Cordill, B. Gludovatz, C. Marker, H. Yan, Z. Feng, L. You, M.-W. Lin, T. Ward, Z.-K. Liu, C. B. Jiang, L.-Q. Chen, R. O. Ritchie, H. M. Christen and R. Ramamoorthy, Nature Communications, vol. 9, 2018, pp. 41-47. (doi: 10.1038/s41467-017-02454)

• Osteocyte Intrinsic TGFβ Signaling Regulates Bone Quality Through Perilacunar Remodeling by N. S. Dole, C. M. Mazur, C. Acevedo, J. P. Lopez, D. A. Monteiro, T. W. Fowler, B. Gludovatz, F. Walsh, J. N. Regan, S. Messina, D. S. Evans, T. F. Lang, B. Zhang, R. O. Ritchie, K. S. Mohammad and T. Alliston, Cell Reports, vol. 21 (9), 2017, pp. 2585-2596. (doi: 10.1016/j.celrep.2017.10.115)

• Modeling Hydrogen-Induced Fracture and Crack Propagation in High Strength Steels by M. Dadfarnia, A. Nagao, B. P. Somerday, P.E. Schembri, J. W., Foulk, K. A. Nibur, D. K. Balch, R. O. Ritchie and P. Sofronis, in Materials Performance in Hydrogen Environments Proceedings of the 2016 Intl. Hydrogen Conference, Jackson Lake Lodge, Moran, WY, American Society for Mechanical Engineers, Warrendale, PA, 2017, pp. 572-580.

• Enhancing the Mechanical Toughness of Epoxy-Resin Composites Using Natural Silk Reinforcements by K. Yang, S. J. Wu, J. Guan, Z. Shao and R. O. Ritchie, Scientific Reports, vol. 7, 2017, pp. 11939. (doi: 10.1038/s41598-017-11919-1)

• On the Question of Fractal Packing Structure in Metallic Glasses by J. Ding, M. Asta and R. O. Ritchie, Proceedings of the National Academy of Sciences (PNAS), vol. 114 (32), 2017, pp. 8458-8463. (doi: 10.1073/pnas.1705723114)

• Damage Tolerance of Nuclear Graphite at Elevated Temperatures by D. Liu, B. Gludovatz, H. S. Barnard, M. Kuball and R. O. Ritchie, Nature Communications, vol. 8, 2017, pp. 15942. (doi: 10.1038/ncomms15942)

• Atypical Fracture with Long-Term Bisphosphonate Therapy is Associated with Altered Cortical Composition and Reduced Fracture Resistance by A. A. Lloyd, B. Gludovatz, C. Riedel, E. A. Luengo, R. Saiyed, E. Marty, D. G. Lorich, J. M. Lane, R. O. Ritchie, B. Busse and E. Donnelly, Proceedings of the National Academy of Sciences (PNAS), published online, July 31, 2017 (doi: 10.1073/pnas.1704460114)

• A Comparative Study of Piscine Defense: The Scales of Arapaima Gigas, Latimeria Chalumnae and Atractosteus Spatula by V. R. Sherman, H. Quan, W. Yang, R. O. Ritchie and M. A. Meyers, Journal of the Mechanical Behavior of Biomedical Materials, vol. 73, 2017, pp. 1-16.

• Damage Tolerance of Nuclear Graphite at Elevated Temperatures by D. Liu, B. Gludovatz, H. S. Barnard, M. Kuball and R. O. Ritchie, Nature Communications, vol. 8, 2017, pp. 15942. (doi: 10.1038/ncomms15942)

• Multiscale Structure and Damage Tolerance of Coconut Shells by B. Gludovatz, F. Walsh, E. A. Zimmermann, S. E. Naleway, R. O. Ritchie, and J. J. Kruzic, Journal of the Mechanical Behavior of Biomedical Materials, 2017 (doi: 10.1016/j.jmbbm.2017.05.024)

• Effect of Temperature on the Fatigue-Crack Growth Behavior of the High-Entropy Alloy CrMnFeCoNi by K. V. S. Thurston, B. Gludovatz, A. Hohenwarter, G. Laplanche, E. P. George and R. O. Ritchie, Intermetallics, vol. 88, 2017, pp. 65-72. (doi: 10.1016/j.intermet.2017.05.009)

• Functional Gradients and Heterogeneities in Biological Materials: Design Principles, Functions, and Bioinspired Applications by Z. Q. Liu, M. A. Meyers, Z. Zhang and R. O. Ritchie, Progress in Materials Science, vol. 88, 2017, pp. 467-498. (doi: 10.1016/j.pmatsci.2017.04.013)

• Long-Fiber Reinforced Thermoplastic Composite Lattice Structures: Fabrication and Compressive Properties by B. Xua, S. Yin, Y. Wanga, H. Lia, B. Zhanga and R. O. Ritchie, Composites Part A: Applied Science & Manufacturing, vol. 97, 2017, pp. 41-50. (doi: 10.1016/j.compositesa.2017.03.002)

• Glucocorticoid suppression of osteocyte perilacunar remodeling is associated with subchondral bone degeneration and osteonecrosis by T. W. Fowler, C. Acevedo, C. Mazur, F. Hall-Glenn, A. Fields, H. A. Bale, R. O. Ritchie, J. Lotz, T. Vail and T. Alliston, Scientific Reports, vol. 7, 2017, p. 44618. (doi: 10.1038/srep44618)

• Characterizing Proton Resorption in Quantum Dot-Polymer Composites for Use as Displacement Sensors by M. A. Koc, S. N. Raja, L. A. Hanson, S. C. Nguyen, N. J. Borys, A. S. Powers, S. Wu, K. Takano, J. K. Swabeck, J. H. Olshansky, L. Lin, R. O. Ritchie and A. P. Alivisatos, ACS Nano, vol. 11, 2017, pp. 2075-2084. (doi: 10.1021/acsnano.6b08277)

• Dislocation Mechanisms and 3D Twin Architectures Generate Exceptional Strength- Ductility-Toughness Combination in CrCoNi Medium-Entropy Alloy by Z. Zhang, H. Sheng, Z. Wang, B. Gludovatz, Z. Zhang, E. P. George, Q. Yu, S. X. Mao and R. O. Ritchie, Nature Communications, vol. 8:14390, Feb. 2017. (doi: 10.1038/ncomms14390)

• On the understanding of the effects of sample size on the variability in fracture toughness of bulk metallic glasses by B. Gludovatz, D. Granata, K. V. S. Thurston, J. Löffler, R. O. Ritchie, Acta Materialia, vol. 126, March 2017, pp. 494-506. (doi: 10.1016/j.actamat.2016.12.054)

• Encapsulation of Perovskite Nanocrystals into Macroscale Polymer Matricies: Enhanced Stability and Polarization by S. N. Raja, Y. Bekenstein, M. A. Koc, S. Fischer, D. Zhang, L. Lin, R. O. Ritchie, P. Yang, A. P. Alivisatos, ACS Applied Materials & Interfaces, vol. 8 (51), Dec. 2016, pp. 35523–35533. (doi: 10.1021/acsami.6b09443)

• Universal Structural Parameter to Quantitatively Predict Metallic Glass Properties by J. Ding, Y.-Q. Cheng, H. Sheng, M. Asta, R. O. Ritchie and E. Ma, Nature Communications, vol. 7:13733, Dec. 2016. (doi: 10.1038/ncomms13733)

• A Novel Approach to Developing Biomimetic ("Nacre-Like") Metal-Compliant-Phase (Nickel-Alumina) Ceramics Through Coextrusion by R. Wilkerson, B. Gludovatz, J. Watts, A. P. Tomsia, G. E. Hilmas and R. O. Ritchie, Advanced Materials, vol. 28 (45), 2016, pp. 10061-10067. (doi: 10.1002/adma.201602471)

• Giant Panda’s Tooth Enamel: Structure, Mechanical Behavior and Toughening Mechanisms under Indentation by Z. Y. Weng, Z. Q. Liu, R. O. Ritchie, D. Jiao, D. S. Li, H. L. Wu, L. H. Deng and Z. F. Zhang, Journal of the Mechanical Behavior of Biomedical Materials, vol. 64, 2016, pp. 125-138. (doi: 10.1016/j.jmbbm.2016.07.029)

• Mechanisms of Local Stress-Sensing in Multifunctional Polymer Films using Fluorescent Tetrapod Nanocrystals by S. N. Raja, D. Zherebetskyy, S. Wu, P. Ercius, A. Powers, A. C. K. Olson, D. X. Du, L. Lin, S. Govindjee, L.-W. Wang, T. Xu, A. P. Alivisatos and R. O. Ritchie, Nano Letters, vol. 16 (8), 2016, pp. 5060-5067. (doi: 10.1021/acs.nanolett.6b01907)

• High Volume-Fraction Silk Fabric Reinforcements Can Improve the Key Mechanical Properties of Epoxy Resin Composites by K. Yang, R. O. Ritchie, Y. Gu. S. J. Wu and J. Guan, Materials and Design, vol. 108, 2016, pp. 470-478. (doi: 10.1016/j.matdes.2016.06.128)

• Enhanced protective role in materials with gradient structural orientations: Lessons from Nature by Z. Q. Liu, Y. K. Zhu, D. Jiao, Z. Y. Weng, Z. F. Zhang and R. O. Ritchie, Acta Biomaterialia, vol. 44, 2016, pp. 31-50. (doi: 10.1016/j.actbio.2016.08.005)

• High Temperature X-Ray Micro-Tomography by A. A. MacDowell, H. Barnard, D. Y. Parkinson, A. Haboub, N. Larson, F. Zok, F. Parerai, N. N. Mansour, H. Bale, B. Gludovatz, C. Acevedo, D. Liu and Robert O. Ritchie, AIP Conference Proceedings, vol. 1741, 2016, p. 050005. (doi: 10.1063/1.4952925)

• Multi-Scale Toughening of Fibre Composites using Carbon Nanofibres and Z-Pins by R. B. Ladani, A. R. Ravindran, S. Wu, K. Pingkarawat, A. J. Kinloch, A. P. Mouritz, R. O. Ritchie and C. H. Wang, Composites Science & Technology, vol. 131, 2016, pp. 98-109. (doi: 10.1016/j.compscitech.2016.06.005)

• Failure Mechanisms of Single-Crystal Silicon Electrodes in Lithium-Ion Batteries by F-F. Shi, Z. Song, P. N. Ross, G. A. Somorjai, R. O. Ritchie and K. Komvopoulos, Nature Communications, vol. 7:11886, June 2016. (doi: 10.1038/ncomms11886)

• Cavitation-Induced Stiffness Reductions in Quantum Dot Polymer Nanocomposites by S. N. Raja, A. J. Luong, W. Zhang, L. Lin, R. O. Ritchie and A. P. Alivisatos, Chemistry of Materials, vol. 28 (8), 2016, pp. 2540-2549. (doi: 10.1021/acs.chemmater.5b04165)

• A Generalized Read-Shockley Model and Larger Scale Simulations for the Energy and Structure of Graphene Grain Boundaries by A. Shekhawat, C. Ophus and R. O. Ritchie, RSC Advances, vol. 6, 2016, pp. 44489-44497. (doi: 10.1039/c6ra07584c)

• Parallel Mechanisms Suppress Cochlear Bone Remodeling to Protect Hearing by E. J. Jáuregui, O. Akil, C. Acevedo, F. Hall-Glenn, B. S. Tsai, H. A. Bale, R. O. Ritchie, L. R. Lustig, T. Alliston, Bone, vol. 89, 2016, pp. 7-15. (doi: 10.1016/j.bone.2016.04.010)

• Anomalous Structure-Property Relationships in Metallic Glasses Through Pressure-Mediated Glass Formation by J. Ding, M. Asta, R. O. Ritchie, Physical Review B, vol. 93, April 8, 2016, pp. 140204(R). (doi: 10.1103/PhysRevB.93.140204)

• Intrinsic mechanical behavior of femoral cortical bone in young, osteoporotic and bisphosphonate-treated individuals in low- and high energy fracture conditions by E. A. Zimmermann, E. Schaible, B. Gludovatz, F. Schmidt, C. Acevedo, M. Hahn, K. Püschel, S. Tang, M. Amling, R. O. Ritchie and B. Busse Scientific Reports, vol. 6:21072, Feb. 2016. (doi: 10.1038/srep21072)

• Notch Fatigue of Ultrahigh Molecular Weight Polyethylene (UHMWPE) used in Total Joint Replacements by F. Ansari, B. Gludovatz, A. Kozak, R. O. Ritchie and L. A. Pruitt Journal of the Mechanical Behavior of Biomedical Materials, vol. 60, 2016, pp. 267-279. (doi: 10.1016/j.jmbbm.2016.02.014)

• Exceptional Damage-Tolerance of a Medium-Entropy Alloy CrCoNi at Cryogenic Temperatures by B. Gludovatz, A. Hohenwarter, K. V. S. Thurston, H. Bei, Z. Wu, E. P. George and R. O. Ritchie, Nature Communications, vol. 7:10602, Feb. 2016. (doi: 10.1038/ncomms10602)

• Toughness and Strength of Nanocrystalline Graphene by A. Shekhawat and R. O. Ritchie, Nature Communications, vol. 7:10546, Jan. 2016. (doi: 10.1038/ncomms10546)

• Sclerostin-Antibody Treatment of Glucocorticoid-Induced Osteoporosis Maintained Bone Mass and Strength by  W. Yao, W. Dai, Li Jiang, E. Y-A. Lay, Z. Zhong, R. O Ritchie, X. Li, H. Ke, N. E Lane, Osteoporosis International, vol. 27 (1), Jan. 2016, pp. 283-294. (doi: 10.1007/s00198-015-3308-6)

• Second Nearest-Neighbor Correlations from Connection of Atomic Packing Motifs in Metallic Glasses and Liquids by  J. Ding, E. Ma, M. Asta and R. O. Ritchie, Scientific Reports, vol. 5:17429, Dec. 2015. (doi: 10.1038/srep17429)

• Bioinspired Large-Scale Aligned Porous Materials Assembled with Dual Temperature Gradients by  H. Bai, Y. Chen, B. Delattre, A. P. Tomsia and R. O. Ritchie, Science Advances, vol. 1 (11), Dec. 2015, pp. e1500849. (doi: 10.1126/sciadv.1500849)

• Nanoscale Origins of the Damage Tolerance of the High-Entropy Alloy CrMnFeCoNi by  Z-J. Zhang, M. M. Mao, J. Wang, H. Tian, B. Gludovatz, Z. Zhang, S. X. Mao, E. P. George, Q. Yu and R. O. Ritchie, Nature Communications, vol. 6:10143, Dec. 2015. (doi: 10.1038/ncomms10143)

• Bioinspired Hydroxyapatite/Poly(Methyl Methacrylate) Composite with Nacre-Mimetic Architecture by a Bidirectional Freezing Method by H. Bai, F. Walsh, B. Gludovatz, B. Delattre, C. Huang, Y. Chen, A. P. Tomsia and R. O. Ritchie, Advanced Materials, vol. 28 (1), Jan. 2016, pp. 50-56. (doi: 10.1002/adma.201504313)

• The Fracture Mechanics of Human Bone: Influence of Disease and Treatment by E. A. Zimmermann, B. Busse and R. O. Ritchie, BoneKEy Reports, vol. 4, article no. 743, Sept. 2015. (doi: 10.1038/bonekey.2015.112)

• Alendronate treatment alters bone tissues at multiple structural levels in healthy canine cortical bone by C. Acevedo, H. Bale, B. Gludovatz, A. Wat, S. Y. Tang, M. Wang, B. Busse, E. A. Zimmermann, E. Schaible, M. R. Allen, D. B. Burr, and R. O. Ritchie, Bone, vol. 81, Dec. 2015, pp. 352-363. (doi: 10.1016/j.bone.2015.08.002)

• Processing, Microstructure and Mechanical Properties of the CrMnFeCoNi High-Entropy Alloy by B. Gludovatz, E. P. George, and R. O. Ritchie, JOM, vol. 67 (10), Oct. 2015, pp. 2262-2270. (doi: 10.1007/s11837-015-1589-z)

• Developing strength and toughness in bio-inspired silicon carbide hybrid materials containing a compliant phase by V. Naglieri, B. Gludovatz, A. P. Tomsia and R. O. Ritchie, Acta Materialia, vol. 98, Oct 2015, pp. 141-151. (doi: 10.1016/j.actamat.2015.07.022)

• Influence of Nanoparticle Branching on the Young’s Modulus of Nanocomposites: Effect of Interface Orientation by S. N. Raja, A. C. K. Olson, A. M. Limaye, K. Thorkelsson, A. J. Luong, L. Lin, R. O. Ritchie, T. Xu and A. P. Alivisatos, Proceedings of the National Academy of Sciences (PNAS), vol. 112 (21), May 26, 2015, pp. 6533-6538.

• Bone as a Structural Material by E. A. Zimmermann and R. O. Ritchie, Advanced Healthcare Materials, vol. 4 (9), June 2015, pp. 1287-1304. (doi: 10.1002/adhm.201500070)

• β-Ecdysone Augments Peak Bone Mass in Mice of Both Sexes by W. Dai, H. L. Zhang, Z. A. Zhong, L. Jiang, H. Chen, Y-A. E. Lay, A. Kot, R. O. Ritchie, N. E. Lane and W. Yao, Clinical Orthopaedics and Related Research, vol. 473 (8), 2015, pp. 2495-2504. (doi: 10.1007/s11999-015-4246-5)

• On the tear resistance of skin by W. Yang, V. R. Sherman, B. Gludovatz, E. Schaible, P. Stewart, R. O. Ritchie, and M. A. Meyers, Nature Communications, vol. 6:6649, March 2015. (doi: 10.1038/ncomms7649)

• Strain-Dependent Dynamic Mechanical Properties of Kevlar to Failure: Structural Correlations and Comparisons to other Polymers by S. N. Raja, S. Basu, A. M. Limaye, T. J. Anderson, C. H. Hyland, L. Lin, A. P. Alivisatos and R. O. Ritchie, Materials Today Communications, vol. 2, March 2015, pp. e33-e37. (doi: 10.1016/j.mtcomm.2014.11.002)

• Prevention of Glucocorticoid Induced Bone Changes with Beta-Ecdysone by W. Dai, L. Jiang, Y-A. E. Lay, H. Chen, G. Jin, H. Zhang, A. Kot, R. O. Ritchie, N. E. Lane and W. Yao, Bone, vol. 74, May 2015, pp. 47-58. (doi: 10.1016/j.bone.2015.01.001)

• Multi-Level Characterization of Human Femoral Cortices and their Underlying Osteocyte Network Reveal Trends in Quality of Young, Aged, Osteoporotic and Antiresorptive-Treated Bone by P. Milovanovica, E. A. Zimmermann, C. Riedel, A. vom Scheidt, L. Herzog, M. Krause, D. Djonic, M. Djuric, R. O. Ritchie, M. Amling, K. Püschel and Björn Busse, Biomaterials, vol. 45 (3), March 2015, pp. 46-55. (doi: 10.1016/j.biomaterials.2014.12.024)

• Bioinspired Structural Materials by U. G. K. Wegst, H. Bai, E. Saiz, A. P. Tomsia and R. O. Ritchie, Nature Materials, published online, Okt. 2014. (doi: 10.1038/nmat4089)

• In Pursuit of Damage Tolerance in Engineering and Biological Materials by R. O. Ritchie, MRS Bulletin, vol. 39 (10), Oct. 2014, pp. 880-890. (doi: 10.1557/mrs.2014.197)

• A fracture-resistant high-entropy alloy for cryogenic applications by B. Gludovatz, A. Hohenwarter, D. Catoor, E. H. Chang, E. P. George, and R. O. Ritchie, Science, vol. 345, Sept. 2014, pp. 1153-1158. (doi: 10.1126/science.1254581)

• Modifications to Nano- and Microstructural Quality and the Effects on Fracture in Paget’s Disease of Bone by E. A. Zimmermann, T. Köhne, H. A. Bale, B. Panganiban, B. Gludovatz, J. Zustin, M. Hahn, M. Krause, M. Amling, R. O. Ritchie and B. Busse, Journal of Bone and Mineral Research, vol. 30 (2), February 2015, pp. 264-273. (doi: 10.1002/jbmr.2340)

• Tensile Testing of Structural Materials at High Temperatures above 1700°C with In Situ Synchrotron X-ray Micro-Tomography by A. Haboub, H. A. Bale, J. R. Nasiatka, B. N. Cox, D. B. Marshall, R. O. Ritchie and A. A. MacDowell, Review of Scientific Instruments, vol. 85, 2014, pp. 083702. (doi: 10.1063/1.4892437)

• A Methodology for the Investigation of Toughness and Crack Propagation in Mouse Bone by A. Carriero, E. A. Zimmermann, S. J. Shefelbine and R. O. Ritchie, Journal of the Mechanical Behavior of Biomedical Materials, vol. 39, Nov. 2014, pp. 38-47. (doi: 10.1016/j.jmbbm.2014.06.017)

• Effect of Cyclical Treatments with Alendronate, Parathyroid Hormone (1-34) and Raloxifene on Cortical Bone Mass and Strength in Ovariectomized Rats by S. K. Amugongo, Wei Yao, J. Jia, W. Dai, Y-A. E. Lay, L. Jiang, D. Harvey, E. A. Zimmermann, E. Schaible, N. Dave, R. O. Ritchie, D. B. Kimmel and N. E. Lane, Bone, vol. 67, Oct. 2014, pp. 257-268. (doi: 10.1016/j.bone.2014.04.033)

• Protective Role of Arapaima Gigas Fish Scales: Structure and Mechanical Behavior by W. Yang, V. Sherman, B. Gludovatz, M. Mackey, E. A. Zimmermann, E. H. Chang, E. Schaible, Z. Qin, M. J. Buehler, R. O. Ritchie and M. A. Meyers, Acta Biomaterialia, vol. 10 (8), August 2014, pp. 3599-3614. (doi: 10.1016/j.actbio.2014.04.009)

• Armoured Oyster Shells by R. O. Ritchie, Nature Materials, vol. 13(5), May 2014, pp. 435-437. (doi: 10.1038/nmat3956)

• Effects of Sequential Osteoporosis Treatments on Trabecular Bone Mass and Strength in Osteopenic Rats by S. K. Amugongo, W. Yao, J. Jia, Y.-A. E. Lay, W. Dai, Li Jiang, D. Walsh, C.-S. Li, N. K. N. Dave, D. Olvera, B. Panganiban, R. O. Ritchie and N. E. Lane, Osteoporosis International, April 2014, published online. (doi: 10.1007/s00198-014-2678-5)

• Scaling Strength Distributions in Quasi-Brittle Materials from Micro to Macro Scales: A Computational Approach to Modeling Nature-Inspired Structural Ceramics by M. Genet, G. Couégnat, A. P. Tomsia and R. O. Ritchie, Journal of Mechanics and Physics of Solids, vol. 68, 2014, pp. 93-106. (doi: 10.1016/j.jmps.2014.03.011)

• Fracture Resistance of Human Cortical Bone Across Multiple Length-Scales at Physiological Strain Rates by E. A. Zimmermann, B. Gludovatz, E. Schaible, B. Busse and R. O. Ritchie, Biomaterials, vol. 35 (21), July 2014, pp. 5472-5481. (doi: 10.1016/j.biomaterials.2014.03.066)

• Size-dependent fracture toughness of bulk metallic glasses by B. Gludovatz, S. E. Naleway, R. O. Ritchie and J. J. Kruzic, Acta Materialia, vol. 70, 2014, pp. 198-207. (doi: 10.1016/j.actamat.2014.01.062)

• How Tough is Brittle Bone? Investigating Osteogenesis Imperfecta in Mouse Bone by A. Carriero, E. A. Zimmermann, A. Paluszny, S. Y. Tang, H. Bale, B. Busse, T. Alliston, G. Kazakia, R. O. Ritchie and S. J. Shefelbine, Journal of Bone and Mineral Research, vol. 29, 2014, in press. (doi: 10.1002/jbmr.2172)

• Unidirectional Freezing of Ceramics Suspensions: In Situ X-Ray Investigation of the Effects of Additives by B. Delattre, H. Bai, R. O. Ritchie, J. De Coninck, and A. P. Tomsia, ACS Applied  Materials and Interfaces, vol. 6 (1), January 2014, pp. 159-166. (doi: 10.1021/am403793x)

• Enhanced fatigue endurance of metallic glasses through a staircase-like fracture mechanism by B. Gludovatz, M. D. Demetriou, M. Floyd, A. Hohenwarter, W. L. Johnson, and R. O Ritchie, Proceedings of the National Academy of Sciences (PNAS), vol. 110 (46), November 2013, pp. 18419-18424. (doi: 10.1073/pnas.1317715110)

• Mechanical adaptability of the Bouligand-type structure in natural dermal armour by E. A. Zimmermann, B. Gludovatz, E. Schaible, N. K. N. Dave, W. Yang, M. Meyers, and R. O Ritchie, Nature Communications, vol. 4:2634, 2013. (doi: 10.1038/ncomms3634)

• Crack Growth in Brittle and Ductile Solids by R. O Ritchie and M. E. Launey, Encyclopedia of Tribology, Q. Jane Wang and Yip Wah Chung, eds., Springer Science, AZ Dordrecht, The Netherlands, 2013, pp. 596-605.

• Crack Growth in Noncrystalline Solids by M. E. Launey and R. O Ritchie, Encyclopedia of Tribology, Q. Jane Wang and Yip Wah Chung, eds., Springer Science, AZ Dordrecht, The Netherlands, 2013, pp. 606-612.

• Elucidating the Nanoscale Structure of Dinosaur Bone by E. Boatman, R. Gronsky, M. B. Goodwin, and R. O. Ritchie, Microscopy Today, vol. 21 (5), 2013, pp. 34-39. (doi: 10.1017/S1551929513000898)

• On the Development of Ice-Templated Silicon Carbide Scaffolds for Nature-Inspired Structural Materials by V. Naglieri, H. A. Bale, B. Gludovatz, A. P. Tomsia, and R. O. Ritchie, Acta Materialia, vol. 61 (18), 2013, pp. 6748-6957. (doi: 10.1016/j.actamat.2013.08.006)

• A Highly Fatigue-Resistant Zr-based Bulk Metallic Glass by S. E. Naleway, R. B. Greene, B. Gludovatz, N. K. N. Dave, R. O. Ritchie, and J. J. Kruzic, Metallurgical and Materials Transactions A, published online, Aug. 13, 2013. (doi: 10.1007/s11661-013-1923-4)

• Stochastic Virtual Test Systems for Ceramic Matrix Composites by B. N. Cox, H. A. Bale, M. Blacklock, T. Fast, M. Novak, V. Rajan, R. Rinaldi, R. O. Ritchie, M. Rossol, J. Shaw, Q. D. Yang, F. Zok, and D. B. Marshall, Annual Review of Materials Research, vol. 44, 2014, pp. 479-529. (doi: 10.1146/annurev-matsci-122013-025024)

• Characterizing Weave Geometry in Textile Ceramic Composites using Digital Image Correlation by M. N. Rossol, J. Shaw, H. Bale, R. O. Ritchie, D. B. Marshall and F. W. Zok, Journal of The American Ceramic Society, vol. 96 (8), 2013, pp. 2362-2365. (doi: 10.1111/jace.12468)

• Nanocomposites of Titanium Dioxide and Polystyrene-Poly(ethylene oxide) Block Copolymer as Solid-State Electrolytes for Lithium Metal Batteries by I. Gurevitch, R. Buonsanti, A. A. Teran, B. Gludovatz, R. O. Ritchie, J. Cabana and N. P. Balsara, Journal of The Electrochemical Society, vol. 160 (9), 2013, pp. A1611-A1617. (doi: 10.1149/2.117309jes)

• Reversing Bone Loss by Directing Mesenchymal Stem Cells to the Bone by W. Yao, M. Guan, J. Jia, W. Dai, Y. E. Lay,  S. Amugongo, R. Liu, D. Olivos, M. Saunders, K. Lam, J. Nolta, D. Olvera, R. O. Ritchie and N. E. Lane, Stem Cells, vol. 31 (9), Sept. 2013, pp. 2003-2014. (doi: 10.1002/stem.1461)

• Vitamin D Deficiency Induces Early Signs of Aging in Human Bone, Increasing the Risk of Fracture by B. Busse, H. A. Bale, E. A. Zimmermann, B. Panganiban, H. D. Barth, A. Carriero, E. Vettorazzi, J. Zustin, M. Hahn, J. W. Ager III, K. Plüschel, M. Amling and R. O. Ritchie, Science Translational Medicine, vol. 5 (193), 2013, p. 193ra88. (doi: 10.1126/scitranslmed.3006286)

• Tetrapod Nanocrystals as Fluorescent Stress Probes of Electrospun Nanocomposites by S. N. Raja, A. C. K. Olson, K. Thorkelsson, A. J. Luong, L. Hsueh, B. Gludovatz, G. Chang, J. J. Huang, J. Zhang, D. Jang, A. Y. Lu, T. Xu, L. Lin, R. O. Ritchie and A. P. Alivisatos, Nano Letters, vol. 13 (8), 2013, pp. 3915-3922. (doi: 10.1021/nl401999t)

• Proposed Pathogenesis for Atypical Femoral Fractures: Lessons from Materials Research by B. Ettinger, D. B. Burr, and R. O. Ritchie, Bone, vol. 55 (2), 2013, pp. 495-500. (doi: 10.1016/j.bone.2013.02.004)

• Structure and Fracture Resistance of Alligator Gar (Atractosteus Spatula) Armored Fish Scales by W. Yang, B. Gludovatz, E. A. Zimmermann, H. A. Bale, R. O. Ritchie and M. A. Meyers, Acta Biomaterialia, vol. 9 (4), 2013, pp. 5876-5889. (doi: 10.1016/j.actbio.2012.12.026)

• Natural Flexible Dermal Armor by W. Yang, I. H. Chen, B. Gludovatz, E. A. Zimmermann, R. O. Ritchie and M. A. Meyers, Advanced Materials, vol. 25 (1), 2013, pp. 31-48. (doi: 10.1002/adma.201202713)

• Prolonged Alendronate Treatment Prevents the Decline in Serum TGF-b1 Levels and Reduces Cortical Bone Strength in Long-Term Estrogen Deficiency Rat Model by J. Jia, Wei Yao, S. Amugongo, M. Shahnazari, W. Dai, Y. E. Lay, D. Olvera, E. A. Zimmermann, R. O. Ritchie, C. S. Li, T. Alliston and N. E. Lane, Bone, vol. 52 (1), 2013, pp. 424-432. (doi: 10.1016/j.bone.2012.10.017)

• Real-Time Quantitative Imaging of Failure Events in Ultrahigh-Temperature Materials under Load at Temperatures above 1600C by H. A. Bale, A. Haboub, A. A. MacDowell, J. R. Nasiatka, D. L. Parkinson, B. N. Cox, D. B. Marshall, and R. O. Ritchie, Nature Materials, vol. 12 (1), 2013, pp. 40-46. (doi: 10.1038/NMAT3497)

• Changes to the Cell, Tissue and Architecture Levels in Cranial Suture Synostosis Reveal a Problem of Timing in Bone Development by J. Regelsberger, P. Milovanovic, T. Schmidt, M. Hahn, E. A. Zimmermann, M. Tsokos, J. Zustin, R. O. Ritchie, M. Amling, and B. Busse, eCells and Materials Journal, vol. 24, 2012, pp. 441-458.

• Mechanical Models to Guide the Development of Synthetic 'Brick and Mortar' Composites by M. R. Begley, N. R. Philips, B. G. Compton, D. V. Wilbrink, R. O. Ritchie, and M. Utz, Journal of Mechanics and Physics of Solids, vol. 60 (8), 2012, pp. 1545-1560. (doi: 10.1016/j.jmps.2012.03.002)
  

• On the Effect of Deep-Rolling and Laser-Peening on the Stress-Controlled Low- and High-Cycle Fatigue Behavior of Ti-6Al-4V at Elevated Temperatures up to 550°C by I. Altenberger, R. K. Nalla, Y. Sano, L. Wagner, and R. O. Ritchie, International Journal of Fatigue, vol. 44, 2012, pp. 292-302. (doi: 10.1016/j.ijfatigue.2012.03.008)
  

• On the Multiscale Origins of Fracture Resistance in Human Bone and its Biological Degradation by E. A. Zimmermann, H. D. Barth, and R. O. Ritchie, Journal of Materials, vol. 64 (4), 2012, pp. 486-493. (doi: 10.1007/s11837-012-0298-0)
  

• Sidewall Adhesion and Sliding Contact Behavior of Polycrystalline Silicon Microdevices Operated in High Vacuum by D. H. Alsem, H. Xiang, R. O. Ritchie, and K. Komvopoulos, Journal of Microelectromechanical Systems, vol. 21 (2), 2012, pp. 359-369. (doi: 10.1109/JMEMS.2011.2180364)
  

• Hydrogen-Induced Intergranular Failure in Nickel Revisited by M. L. Martin, B. P. Somerday, R. O. Ritchie, P. Sofronis and I. M. Robertson, Acta Materialia, vol. 60, 2012, pp. 2739-2745. (doi: 10.1016/j.actamat.2012.01.040)
  

• Fatigue as a Mechanism of Water Tree Propagation in TR-XLPE by Z. Wang, P. Marcolongo, J. A. Lemberg, B. Panganiban, J. W. Evans, R. O. Ritchie, and P.K. Wright, IEEE Transactions on Dielectrics and Electrical Insulation, vol. 19 (1), Feb. 2012, pp. 321-330. (doi: 10.1109/TDEI.2012.6148534)
  

• Directing mesenchymal stem cells to bone to augment bone formation and increase bone mass by M. Guan, W. Yao, R. Liu, K. S. Lam, J. Nolta, J. Jia, B. Panganiban, L. Meng, P. Zhou. M. Shahnazari, R. O. Ritchie, and N. E. Lane, Nature Medicine, vol. 18 (3), March 2012, pp. 456-462. (doi: 10.1038/nm.2665)
  

• Mechanical fatigue and fracture of Nitinol by S. W. Robertson, A. R. Pelton, and R. O. Ritchie, International Materials Reviews, vol. 57 (1), 2012, pp. 1-36. (doi: 10.1179/1743280411Y.0000000009)
  

• Mixed-mode toughness of human cortical bone containing a longitudinal crack in far-field compression by D. Olvera, E. A. Zimmermann, and R. O. Ritchie, Bone, vol. 50, 2012, pp. 331-336. (doi: 10.1016/j.bone.2011.11.004)
  

• Characterization and Mechanical Testing of Alumina-Based Nanocomposites Reinforced with Niobium and/or Carbon Nanotubes Fabricated by Spark Plasma Sintering by K. E. Thomson, D. Jiang, W. Yao, R. O. Ritchie, and A. K. Mukherjee, Acta Materialia, vol. 60, 2012, pp. 622-632. (doi: 10.1016/j.actamat.2011.10.002)
  

• The Conflicts between Strength and Toughness by R. O. Ritchie, Nature Materials, vol. 10 (11), Nov. 2011, pp. 817-822. (doi: 10.1038/nmat3115)
  

• On the Fracture Toughness of Fine-Grained Mo-3Si-1B (wt.%) Alloys at Ambient to Elevated (1300°C) Temperatures by J. A. Lemberg, M. R. Middlemas, T. Weingartner, B. Gludovatz, J. K. Cochran, and R. O. Ritchie, Intermetallics, vol. 20 (1), Jan. 2012, pp. 141-154.

• Characterizing Three-Dimensional Textile Ceramic Composites using Synchrotron X-Ray Computed Micro-Tomography by H. Bale, M. Blacklock, M. R. Begley, D. B. Marshall, B. N. Cox, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 95 (1), Jan 2012, pp. 392-402. (doi: 10.1111/j.1551-2916.2011.04802).

• Characterization of the Effects of X-Ray Irradiation on the Hierarchical Structure and Mechanical Properties of Human Cortical Bone by H. D. Barth, E. A. Zimmermann, E. Schaible, S. Y. Tang, T. Alliston, and R. O. Ritchie, Biomaterials, vol. 32 (34), Dec. 2011, pp. 8892-8904. (doi: 10.1016/j.biomaterials.2011.08.013).

• Age-Related Changes in the Plasticity and Toughness of Human Cortical Bone at Multiple Length-Scales by E. A. Zimmermann, E. Schaible, H. Bale, H. D. Barth, S. Y. Tang, P. Reichert, B. Busse, T. Alliston, J. W. Ager III, and R. O. Ritchie, Proceedings of the National Academy of Sciences (PNAS), vol. 108 (35), Aug. 2011, pp. 14416-14421. (doi: 10.1073/pnas.1107966108)

• Impact of Thermomechanical Texture on the Superelastic Response of Nitinol Implants by M. Barney, D. Xu, S. W. Robertson, V. Schroeder, R. O. Ritchie, A. R. Pelton and A. Mehta, Journal of the Mechanical Behavior of Biomedical Materials, vol. 4 (7), Oct. 2011, pp. 1431-1439.
  

• Effect of Aging on the Transverse Toughness of Human Cortical Bone: Evaluation by R-Curves by K. J. Koester, H. D. Barth, and R. O. Ritchie, Journal of the Mechanical Behavior of Biomedical Materials, vol. 4, 2011, pp. 1504-1513.
  

• An Equivalent St rain/Coffin-Manson Approach to Multiaxial Fatigue and Life Prediction in Superelastic Nitinol Medical Devices by A. Runciman, D. Xu, A. R. Pelton and R. O. Ritchie, Biomaterials, vol. 32, 2011, pp. 4987-4993.
  

• Differential Maintenance of Cortical and Cancellous Bone Strength following Discontinuation of Bone Active Agents by M. Shahnazari, W. Yao, B. Panganiban, R. O. Ritchie,Y. Hagar, and N. E. Lane, Journal of Bone and Mineral Research, vol. 26, March 2011, pp. 569-581.

• A Damage Tolerant Glass by M. D. Demetriou, M. E. Launey, G. Garret, J. P. Schramm, D. C. Hofmann, W. L. Johnson, and R. O. Ritchie, Nature Materials, vol. 10 (2), Feb. 2011 (published online Jan. 10, 2011).

• Fatigue-Induced Grain Coarsening in Nanocrystalline Platinum Films by R. A. Meirom, D. H. Alsem, A. L. Romasco, T. Clark, R. Polcawich, J. Pulskamp, M. Dubey, R. O. Ritchie, and C. L. Muhlstein, Acta Materialia, vol. 59 (3) Feb. 2010, pp. 1141-1149.

• Decrease in the Osteocyte Lacunae Density Accompanied by Hypermineralized Lacunar Occlusion Reveal Failure and Delay of Remodeling in Aged Human Bone by B. Busse, D. Djonic, P. Milovanovic, M. Hahn, K. Püschel, R. O. Ritchie, M. Djuric, and M. Amling,  Aging Cell, vol. 9, 2010, pp. 1065-1075.

• Scaling of Strength and Ductility in Bioinspired Brick and Mortar Composites by D. V. Wilbrink, M. Utz, R. O. Ritchie, and M. R. Begley, Applied Physics Letters, vol. 97 (19), Nov. 2010, pp. 193701.

• Changes in Cortical Bone Response to High-Fat Diet from Adolescence to Adulthood in Mice by S. S. Ionova-Martin, J. M. Wade, S. Tang, M. Shahnazari, J. W. Ager III, N. E. Lane, W. Yao, T. Alliston, C. Vaisse, and R. O. Ritchie, Osteoporosis International, vol. 22 (8), Aug. 2011, pp. 2283-2293.

• Wear Mechanisms and Friction Parameters for Sliding Wear of Micron-Scale Polysilicon Sidewalls by D. H. Alsem, R. van der Hulst, E. A. Stach, M. T. Dugger, J. Th. M. de Hosson, and R. O. Ritchie, Sensors and Actuators A, vol. 163, 2010, pp. 373-382.

• The Significance of Crack-Resistance Curves to the Mixed-Mode Fracture Toughness of Human Cortical Bone by E. A. Zimmermann, M. E. Launey, and R. O. Ritchie, Biomaterials, vol. 31 (20), Aug. 2010, pp. 5297-5308.

• On the Effect of X-ray Irradiation on the Deformation and Fracture Behavior of Human Cortical Bone by H. D. Barth, M. E Launey, A. A. MacDowell, and R. O. Ritchie, Bone, vol. 46, June 2010, pp. 1475-1485.

• Microindentation for In Vivo Measurement of Bone Tissue Mechanical Properties in Humans by A. Diez-Perez, R. Güerri, X. Nogues, E. Cáceres, M. J. Peña, L. Mellibovsky, C. Randall, D. Bridges, J. Weaver, A. Proctor, D. Brimer, K. J. Koester, R. O. Ritchie, and P. K. Hansma, Journal of Bone and Mineral Research, vol. 25, 2010, pp. 1877-1885.

• On the Mechanistic Origins of Toughness in Bone by M. E. Launey, M. J. Buehler, and R. O. Ritchie, Annual Review of Materials Research, vol. 40, 2010, pp. 25-53.

• Osteopontin Deficiency Increases Bone Fragility but Preserves Bone Mass by P. J. Thurner, C. G. Chen, S. Ionova-Martin, L. Sun, A. Harman, A. Porter, J. W. Ager III, R. O. Ritchie, and T. Alliston, Bone, vol. 46, June 2010, pp. 1564-1573.

• Atomic-Scale Imaging and the Effect of Yttrium on the Fracture Toughness of Silicon Carbide Ceramics by A. M. Kueck, Q. M. Ramasse, L. C. De Jonghe, and R. O. Ritchie, Acta Materialia, vol. 58 (8), May 2010, pp. 2999-3005.

• Mechanical Properties of Si3N4-Al2O3 FGM Joints with 15 Layers for High-Temperature Applications by C. S. Lee, J. A. Lemberg, D. G. Cho, J. Y. Roh, and R. O. Ritchie, Journal of the European Ceramic Society, vol. 30, 2010, pp. 1743-1749.

• The Effects of Cubic Stiffness on Fatigue Characterization Resonator Performance by M. Budnitzki, M. C. Scates, R. O. Ritchie, E. A. Stach, C. L. Muhlstein, and O. N. Pierron, Sensors and Actuators A, vol. 157 (2), Feb. 2010, pp. 228-234.

• Mechanistic Aspects of the Fracture Toughness of Elk Antler Bone by M. E. Launey, P.-Y. Chen, J. McKittrick, and R. O. Ritchie, Acta Biomaterialia, vol. 6, April 2010, pp. 1505-1514.

• Higher Doses of Bisphosphonates Further Improve Bone Mass, Architecture and Strength but not the Tissue Materials Properties in Aged Rats by M. Shahnazari, W. Yao, W-W. Dai, B. Wang, A. J. Burghardt, S. S. Ionova-Martin, R. O. Ritchie, D. Heeren, A. J. Burghardt, D. P. Nicolella, M. G. Kimiecik, and N. E. Lane, Bone, vol. 46 (5), May 2010, pp. 1267-1274.

• A Statistical, Physical-Based, Micro-Mechanical Model of Hydrogen-Induced Intergranular Fracture in Steel by P. Novak, R. Yuan, B. P. Somerday, P. Sofronis, and R. O. Ritchie, Journal of the Mechanics and Physics of Solids, vol. 58, (2), 2010, pp. 206-226..

• Reduced Size-Independent Mechanical Properties of Cortical Bone in High-Fat Diet Obesity by S. S. Ionova-Martin, S. H. Do, H. D. Barth, M. Szadkowska, A. E. Porter, J. W. Ager III, J. W. Ager, T. Alliston, C. Vaisse, and R. O. Ritchie, Bone, vol. 46, 2010, pp. 217-225.

• A Novel Biomimetic Approach to the Design of High-Performance Ceramic/Metal Composites by M. E. Launey, E. Munch, D. H. Alsem, E. Saiz, A. P. Tomsia, and R. O. Ritchie Journal of the Royal Society Interface, vol. 7, 2010, pp. 741-753.

• Mixed-Mode Fracture of Human Cortical Bone by E. A. Zimmermann, M. E. Launey, H. D. Barth, and R. O. Ritchie, Biomaterials, vol. 30, 2009, pp. 5877-5884.

• Fracture Toughness and Crack-Resistance Curve Behavior in Metallic Glass-Matrix Composites by M. E. Launey, D. C. Hofmann, J.-Y. Suh, H. Kzachkov, W. L. Johnson, and R. O. Ritchie, Applied Physics Letters, vol. 94, June 2009, p. 241910.

• Prolonged Treatments with Anti-Resorptive Agents and PTH have Different Effects on Bone Strength and the Degree of Mineralization in Estrogen Deficient Osteoporosis in Aged Female Rats by Z. Cheng, W. Yao, E. Zimmerman, C. Busse, R. O. Ritchie, and N. E. Lane, Journal of Bone and Mineral Research,  vol. 24 (2), Feb. 2009, pp. 209-220.

• On the Use of Grain-Boundary Engineering to Enhance Resistance to Intergranular Embrittlement due to Hydrogen in Metallic Materials by S. Bechtle, M. Kumar, B. P. Somerday, M. E. Launey, and R. O. Ritchie, Acta Materialia, 2009.

• Plasticity and Toughness in Bone by R. O. Ritchie, M. J. Beuhler, and P. Hansma, Physics Today, vol. 62 (6), June 2009, pp. 41-47.

• Pharmacologic Inhibition of the TGF-b Type I Receptor has Anabolic and Anti-Catabolic Effects on Bone by K. S. Mohammad, C. Chen, G. Balooch, E. Stebbins, E. Stebbins, C. R. McKenna, H. Davis, M. Niewolna, X. H. Peng, D. H. N. Nguyen, S. S. Ionova-Martin, J. W. Bracey, W. R. Hogue, D. H. Wong, R. O. Ritchie, L. J. Suva, R. Derynck, T. A. Guise, and T. Alliston, The Public Library of Science - One, vol. 4, April 2009, p. e5275.

• Designing Highly Toughened Hybrid Composites Through Nature-Inspired Hierarchical Complexity by M. E. Launey, E. Munch, D. H. Alsem, H. D. Barth, E. Saiz, A. P. Tomsia, and R. O. Ritchie, Acta Materialia, vol.57, 2009, pp. 2919-2932.

• Solution to the Problem of the Poor Cyclic Fatigue Resistance of Bulk Metallic Glasses by M. E. Launey, D. C. Hofmann, W. L. Johnson, and R. O. Ritchie, Proceedings of the National Academy of Sciences (PNAS), vol. 106, 2009, pp. 4986-4991.

• On the Fracture Toughness of Advanced Materials by M. E. Launey and R. O. Ritchie, Advanced Materials, vol. 21 (20), 2009, pp. 2103-2110.

• Weakening of Dentin from Cracks Resulting from Laser Irradiation by M. Staninec, N. Meshkin, S. K. Manesh, R. O. Ritchie, and D. Fried, Dental Materials, vol 25, 2009, pp 520-525.

• Indentation Techniques for Evaluating the Fracture Toughness of Biomaterials and Hard Tissues by J. J. Kruzic, D. K. Kim, K. J. Koester, and R. O. Ritchie,  Journal of the Mechanical Behavior of Biomedical Materials, vol. 2, 2009, pp. 384-395.

• Glucocorticoid-Induced Bone Loss in Mice Can Be Reversed by the Actions of Parathyroid Hormone and Risedronate on Different Pathways for Bone Formation and Mineralization by W. Yao, Z. Cheng, A. Pham, C. Busse, E. Zimmerman, R. O. Ritchie, and N. E. Lane, Arthritis and Rheumatism, vol. 58, 2008, pp. 3485-3497.

• Tough Bio-Inspired Hybrid Materials by E. Munch, M. E. Launey, D. H. Alsem, E. Saiz, A. P. Tomsia, and R. O. Ritchie, Science, vol. 322 (5907), Dec 5, 2008, pp. 1516-1520.

• Micron-Scale Friction and Sliding Wear of Polycrystalline Silicon Thin Structural Films in Ambient Air by D.H. Alsem, M.T. Dugger, E.A. Stach, and R.O. Ritchie, Journal of Microelectromechanical Systems, vol. 17, 2008, pp. 1144-1154.

• Atomic-resolution imaging of the nanoscale origin of toughness in rare-earth doped SiC by A. M. Kueck, D. K. Kim, Q. M. Ramasse, L. C. De Jonghe, and R. O. Ritchie, Nano Letters, vol. 8, 2008, pp. 2935-2939.

• Measurement of the Toughness of bone: A Tutorial with Special Reference to Small Animal Studies by R.O. Ritchie, K.J. Koester, S. Ionova, W. Yao, N.E. Lane, J.W. Ager III, Bone, vol. 43, 2008, pp. 798-812.

• Effect of the Post-Release Sidewall Morphology on the Fracture and Fatigue Properties of Polycrystalline Silicon Structural Films by D. A. Alsem, B. L. Boyce, E. A. Stach, and R. O. Ritchie, Sensors and Actuators A, vol. 147, 2008, pp. 553-560.

• Comments on "Measurement of the Microstructural Fracture Toughness of Cortical Bone using Indentation Fracture" by J. J. Kruzic and R. O. Ritchie, Journal of Biomechanics, vol. 41, 2008, pp. 1379-1380.

• How Tough is Human Bone? In Situ Measurements on Realistically Short Cracks by K. J. Koester, J. W. Ager III, and R. O. Ritchie, Nature Materials, Nature Materials, vol. 7, 2008, pp. 672-677.

• The Utility of R-Curves for Understanding Fracture Toughness-Strength Relations in Bridging Ceramics by J. J. Kruzic, R. L. Sadat, M. J. Hoffmann, R. M. Cannon, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 91, 2008, pp. 1986-94.

• Adhesion between Biodegradable Polymers and Hydroxyapatite: Relevance to Synthetic Bone-Like Materials and Tissue Engineering Scaffolds by R. Neuendorf, E. Saiz, A. P. Tomsia, and R. O. Ritchie, Acta Biomaterialia, vol. 4, 2008, pp. 1288-1296.

• Aging and Fracture of Human Cortical Bone and Tooth Dentin by K. J. Koester, J. W. Ager III, and R. O. Ritchie, Journal of Materials, vol. 80, June 2008, pp. 33-38.

• Further Considerations on the High-Cycle Fatigue of Micron-Scale Polycrystalline Silicon by D. H. Alsem, C. L. Muhlstein, E. A. Stach, and R. O. Ritchie, Scripta Materialia, vol. 59, 2008, pp. 931-935.

• Fatigue of Dentin-Composite Interfaces with Four-Point Bend by M. Staninec, P. Kim, G. W. Marshall, R. O. Ritchie, and S. J. Marshall, Dental Materials, vol. 24, 2008, pp. 799-803.

• On the Toughening of Brittle Materials by Grain Bridging: Promoting Intergranular Fracture Through Grain Angle, Strength and Toughness J. W. Foulk III, G. C. Johnson, P. A. Klein, and R. O. Ritchie, Journal of the Mechanics and Physics of Solids, vol. 56, 2008, pp. 2381-2400.

• Effect of Microstructure on the Fatigue of Hot Rolled and Cold Drawn NiTi Shape Memory Alloys by K. Gall, J. Tyber, G. Wilkesanders, S. W. Robertson. R. O. Ritchie, and H. J. Maier, Materials Science and Engineering A, vol. 486, 2008, pp.389-403.

• In-Situ Bend Testing of Niobium-Reinforced Alumina Nanocomposites with and without Single-Walled Nanotubes by K. E. Thomson, D. Jiang, J. A. Lemberg, K. J. Koester, R. O. Ritchie, and A. K. Mukherjee, Materials Science and Engineering A, vol. 493, 2008, pp. 256-260.

• Four-Point Bending Evaluation of Dentin-Composite Interfaces by M. Staninec, H. Nguyen, P. Kim, G. W. Marshall, R. O. Ritchie, Medicina Oral, Patologíca Oral Y Cirugíca Bucal, vol. 13, 2008, pp. E81-84. 

• The Effect of Aging on Crack-Growth Resistance and Toughening Mechanisms in Human Dentin by K. J. Koester, J. W. Ager III, and R. O. Ritchie, Biomaterials, vol. 29, 2008, pp. 1318-1328. 

• A Fracture-Mechanics Based Approach to Fracture Control in Biomedical Devices Manufactured from Superelastic Nitinol Tube by S. W. Robertson and R. O. Ritchie, Journal of Biomedical Materials Research B: Applied Biomaterials, vol. 84B, Jan. 2008, pp. 26-33. 

• The Aminobisphosphonate, Risedronate, Preserves Localized Mineral and Material Properties of Bone in the Presence of Glucocorticoids by G. Balooch, W. Yao, J. W. Ager III, M. Balooch, R. K. Nalla, A. E. Porter, A. Mastroianni, R. O. Ritchie, and N. E. Lane, Arthritis and Rheumatism, vol. 56, 2007, pp. 3726-3737.

• Of the Physics of Moisture-Induced Cracking in Metal-Glass (Copper/Silica) Interfaces by J. C. Card, R. M. Cannon, E. Saiz, A. P. Tomsia, and R. O. Ritchie, Journal   of Applied Physics, vol. 102, 2007, pp. 053516-12.

• Atomic-Scale Observation of the Grain-Boundary Structure of Yb-Doped and Heat-Treated Silicon Nitride Ceramics by A. Ziegler, M. K. Cinibulk, C. Kisielowski, and R. O. Ritchie, Applied Physics Letters, vol. 91, Oct. 2007, pp. 141906.

• A Preservation Study of Carbon Nanotubes in Alumina-Based Nanocomposites via Raman Spectroscopy and Nuclear Magnetic Resonance by K. E. Thomson, D. Jiang, R. O. Ritchie, and A. K. Mukherjee, Applied Physics A, vol. 89, 2007, pp. 651-654.

• Evolution of Crack-Tip Transformation Zones in Superelastic Nitinol Subjected to In Situ Fatigue: A Fracture Mechanics and Synchrotron X-Ray Micro-Diffraction Analysis by S. W. Robertson, A. Mehta, A. R. Pelton, and R. O. Ritchie, Acta Materialia, vol. 55, Oct. 2007, pp. 6198-6207.

• The Degree of Bone Mineralization is Maintained with Single Intravenous Bisphosphonates in Aged Estrogen Deficient Rats and is a Strong Predictor of Bone Strength by W. Yao, Z. Cheng, K. J. Koester, J. W. Ager III, M. Balooch, A. Pham, S. Chefo, C. Busse, R. O. Ritchie, and N. E. Lane, Bone, vol. 41, Nov. 2007, pp. 804-812.

• Stress-Corrosion Crack Growth of Si-Na-K-Mg-Ca-P-O Bioactive Glasses in Simulated Human Physiological Environment by D. R. Bloyer, J. M. McNaney, R. M. Cannon, E. Saiz, A. P. Tomsia, and R. O. Ritchie, Biomaterials, vol. 28 (33), Nov. 2007, pp. 4901-4911.

• Fatigue of Mineralized Tissues: Bone and Dentin by J. J. Kruzic and R. O. Ritchie, Journal of the Mechanical Behavior of Biomedical Materials, vol. 1 (1), Jan. 2007, pp. 3-17.

• Analysis of the Material Proporties of Chondrogenic Differentiated Adipose-Derived Adult Stromal Cells (ASC) Using an In Vitro Three-dimensional Micromass Culture System by Y. Xu, G. Balooch, R. O. Ritchie, M. Chiou, E. Bakerman, and M. T. Longaker, Biochemical and Biophysical Research Communications, vol. 359, July 2007, pp. 311-316.

• On the Fatigue-Crack Growth Properties of Thin-Walled Superelastic Austenitic Nitinol Tube for Endovascular Stents by J. M. Stankiewicz, S. W. Robertson, and R. O. Ritchie, Journal of Biomedical Materials Research A, vol. 81A, 2007, pp. 685-691.

• Understanding the Deformation and Fracture of Nitinol using In Situ Synchrotron X-Ray Micro-Diffraction by A. Metha, X.-Y. Gong, V. Imbeni, A. R. Pelton, and R. O. Ritchie, Advanced Materials, 2007.

• Elastic Constants and Tensile Properties of Al2O3 by Density Functional Calculations by R. Yu, X. F. Zhang, L. C. De Jonghe, and R. O. Ritchie, Physical Review B, vol. 75, 2007, pp. 104114.

• High-Cycle Fatigue of Nickel-Base Superalloy Ren� 104 (ME3): Interaction of Microstructurally-Small Cracks with Grain Boundaries of Known Character by Y. Gao, J. S. St�lken, M. Kumar, and R. O. Ritchie, Acta Materialia, vol. 55, 2007, pp. 3155-3167.

• Mechanisms for Fatigue of Micron-Scale Silicon Structural Films by D. H. Alsem, O. N. Pierron, E. A. Stach, C. L. Muhlstein, and R. O.
  Ritchie, Advanced Engineering Materials, vol. 9, 2007, pp. 15-30.

• In Vitro Fatigue-Crack Growth and Fracture Toughness Behavior of Thin-Walled Superelastic Nitinol Tube for Endovascular Stents: A Basis for Defining the Effects of Crack-Like Defects by S. W. Robertson and R. O. Ritchie, Biomaterials, vol. 28, 2007, pp. 700-709.

• An Electron  Microscopy Study of Wear in Polysilicon Microelectromechanical Systems by D. H. Alsem, E. A. Stach, M. T. Dugger, M. Enachescu, and R. O. Ritchie, Thin Solid Films, vol. 515, 2007, pp. 3259-3266.

• Fatigue Failure in Micron-Scale Polycrystalline Silicon Films: Influence of Environment and Surface Oxide Thickness by D. H. Alsem, R. Timmerman, B. L. Boyce, E. A. Stach, J. Th. M. De Hosson, and R. O. Ritchie, Journal of Applied Physics, vol. 101 (1), 2007, pp. 013515.

• A Micromechanical Basis for Partitioning the Evolution of Grain Bridging in Brittle Materials by J. W. Foulk III, R. M. Cannon, G. C. Johnson, P. A. Klein, and R. O. Ritchie, Journal of the Mechanics and Physics of Solids, vol. 55, 2007, pp. 719-743.

• Role of Alcohol on the Fracture Resistance of Teeth by R. K. Nalla, J. H. Kinney, A. P. Tomsia, and R. O. Ritchie, Journal of Dental Research, vol. 85, 2006, pp. 1022-1026.  

• On the Increasing Fragility of Human Teeth with Age: A Deep-UV Resonance Raman Study by J. W. Ager III, R. K. Nalla, G. Balooch, G. Kim, M. Pugach, S. Habelitz, G. W. Marshall, J. H. Kinney, and R. O. Ritchie, Journal of Bone and Mineral Research, vvol. 21, Dec. 2006, pp. 1879-1887. 

• Kitagawa-Takahashi diagrams define the limiting conditions for cyclic fatigue failure in human dentin J. J. Kruzic and R. O. Ritchie, Journal of Biomedical Materials Research A, vol. 79A, Dec. 2006. 

• Cortical Bone Fracture by R. O. Ritchie, J. H. Kinney, J. J. Kruzic, and R. K. Nalla, Wiley Encyclopedia of Biomedical Engineering, Metin Akay, ed., 2006 

• Fracture, Aging and Disease in Bone by J. W. Ager, III, G. Balooch and R. O. Ritchie,  Journal of Materials Research, vol. 21, 2006, pp. 1878-1892 

• Interfacial Structure in Silicon Nitride Sintered with Lanthanide Oxide  by . W. Dwyer, A. Ziegler, N. Shibata, G. B. Winkelman, R. L. Satet, M. J. Hoffmann, M. K. Cinibulk, P. F. Becher, G. S. Painter, N. D. Browning, D. J. H. Cockayne, R. O. Ritchie, and S. J. Pennycook, Journal of Materials Science, vol. 41, 2006, pp. 4405-4412. 

• Canine Cranial Reconstruction Using Autologous Bone Marrow Stromal Cells by M. H. Mankani, S. A Kuznetsov, B. Shannon, R. K. Nalla, R. O. Ritchie, Y. Qin, P. G. Robey, American Journal of Pathology, vol. 168, 2006, pp. 542-550. 

• Effect of Product Form and Heat Treatment on the Crystallographic Texture of Austenitic Nitinol by S. W. Robertson, X.-Y. Gong, and R. O. Ritchie, Journal of Materials Science, vol. 41, 2006, pp. 621-630. 

• Stress-Corrosion Fatigue-Crack Growth in a Zr-Based Bulk Amorphous Metal by V. Schroeder and R. O. Ritchie,  Acta Materialia, vol. 54,  April 2006, pp. 1785-1794.

• Propagation of Surface Fatigue Cracks in  Human Cortical Bone by J. J. Kruzic, J. Scott, R. K. Nalla, and R. O. Ritchie, Journal of Biomechanics, vol. 39, 2006,                  pp.968-972.

• Atomic-Resolution Observation of Semi-Crystalline Intergranular Thin Films in Silicon Nitride by A. Ziegler, J. C. Idrobo, M. K. Cinibulk, C. Kisielowski, N. D. Browning, and R. O. Ritchie, Applied Physics Letters, vol. 88, 2006, p. 141919.

• Re-Evaluating the Toughness of Human Cortical Bone by Q. D. Yang, B. N. Cox, R. K. Nalla, and R. O. Ritchie, Bone, vol. 38, 2006, pp. 878-887.

• Fracture Length Scales in Human Cortical Bone: The Necessity of Nonlinear Fracture Models by Q. D. Yang, B. N. Cox, R. K. Nalla, and R. O. Ritchie, Biomaterials, vol. 27, 2006, pp.2095-2113.

• Fatigue and Life Prediction  for Cobalt-Chromium Stents: A Fracture Mechanics Analysis by R. V. Marrey, R. Burgermeister, R. B. Grishaber, and R. O. Ritchie, Biomaterials, vol. 27, 2006, pp.1988-2000.

• TGF-beta Regulates the Mechanical Properties and Composition of Bone Matrix by G. Balooch, M. Balooch, R. K. Nalla, S. Schilling, E. Filvaroff, G. W. Marshall, S. J. Marshall, R. O. Ritchie, R. Derynck, and T. Alliston, Proceedings of the National Academy of Sciences (PNAS), vol. 102 Dec. 2005.

• On the Improvement of the Ductility of Molybdenum by Spinel (MgAl2O4) Particles by J. H. Schneibel, M. P. Brady, J. J. Kruzic, and R. O. Ritchie, Zeitschrift f\FCr Metallkunde, vol. 96, 2005, pp. 632-637.

• Ab Initio Structural Energetics of beta-Si3N4 Surfaces by J. C. Idrobo, H. Iddir, S. \D6ğ\FCt, A. Ziegler, N. D. Browning, and R. O. Ritchie, Physical Review B, vol. 72, Dec. 2005.

• High-Cycle Fatigue of a Nickel-Base Superalloy ME3 at Ambient and Elevated Temperatures: Role of Grain-Boundary Engineering by Y. Gao, M. Kumar, R. K. Nalla, and R. O. Ritchie, Metallurgical and Materials Transactions A, vol. 36A (12), Dec. 2005, pp. 3325-3333.

• Role of Microstructure in the Aging-Related Deterioration of the Toughness of Human Cortical Bone by R. K. Nalla. J. J. Kruzic, J. H. Kinney, M. Balooch, J. W. Ager, III, and R. O. Ritchie, Materials Science and Engineering C, vol. 26, 2006, pp. 1251-1260.

• Fabrication and Mechanical Properties of PLA/HA Composites: A Study of In Vitro Degradation by J. Russias, E. Saiz, R. K. Nalla, K. Gryn, R. O. Ritchie, and A. P. Tomsia, Materials Science and Engineering C, vol. 26, 2006, pp. 1289-1295.

• Ambient- to Elevated-Temperature Fracture and Fatigue Properties of Mo-Si-B Alloys: Role of Microstructure by J. J. Kruzic, J. H. Schneibel, and R. O. Ritchie, Metallurgical and Materials Transactions A, vol. 36A, Sept. 2005, pp. 2393-2402.

• Ultrastructural Examination of Dentin using Focused Ion-Beam Cross-Sectioning and Transmission Electron Microscopy by R. K. Nalla, A. E. Porter, C. Dariao, A. M. Minor, V. Radmilovic, E. A. Stach, A. P. Tomsia, and R. O. Ritchie, Micron, vol. 36, Oct.-Dec., 2005, pp. 672-680.

• Nanocrystal-Powered Nanomotor by B. C. Regan, S. Aloni, K. Jensen, R. O. Ritchie, and A. Zettl, Nano Letters, vol. 5, 2005, pp. 1730-1733.

• Simple and Accurate Fracture Toughness Testing Methods for Pyrolytic Carbon/Graphite Composites used in Heart-Valve Prostheses by J. J. Kruzic, S. J. Kuskowski, and R. O. Ritchie, Journal of Biomedical Materials Research A, vol. 74A, 2005, pp. 461-464.

• A Transmission Electron Microscopy Study of Mineralization in Age-Induced Transparent Dentin by A. E. Porter, R. K. Nalla, A. Minor, J. R. Jinschek, C. F. Kisielowski, V. Radmilovic, J. H. Kinney, A. P. Tomsia, and R. O. Ritchie, Biomaterials, vol. 26, 2005, pp. 7650-7660.

• Deep-Ultraviolet Raman Spectroscopy Study of the Effect of Aging on Human Cortical Bone by J. W. Ager, III, R. K. Nalla, K. L. Breeden, and R. O. Ritchie, Journal of Biomedical Optics, vol. 10, May/June 2005, pp. 034012.

• Effects of Moisture on Grain-Boundary Strength, Fracture and Fatigue Properties of Polycrystalline Alumina by J. J. Kruzic, R. M. Cannon, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 88, 2005, pp. 2236-2245.

• On the Effect of Local Grain-Boundary Chemistry on the Macroscopic Mechanical Properties of a High-Purity Y2O3-Al2O3-Containing Silicon Nitride Ceramic: Role of Oxygen by A. Ziegler, J. M. McNaney, M. J. Hoffmann, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 88, July 2005, pp. 1900-1908.

• Dentin Erosion Simulation by Cantilever-Beam Fatigue and pH Change by M. Staninec, R. K. Nalla, J. F. Hilton, R. O. Ritchie, L. G. Watanabe, G. Nonomura, G. W. Marshall, and S. J. Marshall, Journal of Dental Research, vol. 84,  2005, pp. 371-375.

• Incomplete Similarity and Fatigue-Crack Growth by R. O. Ritchie, International Journal of Fracture, vol. 132 , April 2005, pp. 197-203.

• Fatigue Threshold R-Curves for Predicting the Reliability of Ceramics under Cyclic Loading Conditions by J. J. Kruzic, R. M. Cannon, J. W. Ager, III, and R. O. Ritchie, Acta Materialia, vol. 53,  2005, pp. 2595-2605.

• Optimization of Mo-Si-B Intermetallic Alloys by J. H. Schneibel, R. O. Ritchie, J. J. Kruzic, and P. R. Tortorelli, Metallurgical and Materials Transactions A, vol. 36A, 2005, pp. 525-531.

• On the Effect of Local Grain-Boundary Chemistry on the Macroscopic Mechanical Properties of a High Purity Y2O3-Al2O3-Containing Silicon Nitride Ceramic by A. Ziegler, J. M. McNaney, M. J. Hoffmann, and R. O. Ritchie, in Electron Microscopy of Molecular and Atom-Scale Mechanical Behavior, Chemistry, and Structure, MRS Symp. Proc., vol. 839, 2005.

• Role of Microstructure in Promoting Fracture and Fatigue Resistance in Mo-Si-B Alloys by J. J. Kruzic, J. H. Schneibel, and R. O. Ritchie, in Integrative and Interdisclipinary Aspects of Intermetallics, MRS Symp. Proc., vol. 842, 2005.

• A Fracture Mechanics and Mechanistic Approach to the Failure of Cortical Bone by R. O. Ritchie, J. H. Kinney, J. J. Kruzic, and R. K. Nalla, Fatigue & Fracture of Engineering Materials & Structures, vol. 28, 2005, pp. 345-371.

• The Dentin-Enamel Junction and the Fracture of Human Teeth by V. Imbeni, J. J. Kruzic, G. W. Marshall, S. J. Marshall, and R. O. Ritchie, Nature Materials, vol. 4, March 2005, pp. 229-232.

• Fatigue Failure in Thin-film Polycrystalline Silicon is due to a Subcritical Cracking within the Oxide Layer by D. H. Alsem, E. A. Stach, C. L. Muhlstein, and R. O. Ritchie, Applied Physics Letters, vol. 86, 2005, pp. 041914

• Crystallographic Texture for Tube and Plate of the Superelastic/Shape-Memory Alloy Nitinol Used for Endovascular Stents by S. W. Robertson, V. Imbeni, H.-R. Wenk, and R. O. Ritchie, Journal of Biomedical Materials Research A, vol. 72A, 2005, pp. 190-199.

• Effects of Polar Solvents on the Fracture Resistance of Dentin: Role of Water Hydration by R. K. Nalla, M. Balooch, J. W. Ager, J. J. Kruzic, J. H. Kinney, and R. O. Ritchie, Acta Biomaterialia, vol. 1, 2005, pp. 31-43.

• Age-Related Transparent Root Dentin: Mineral Concentration, Crystallite Size, and Mechanical Properties by J. H. Kinney, R. K. Nalla, J. A. Pople, T. M. Breunig, and R. O. Ritchie, Biomaterials, vol. 26, 2005, pp. 3363-3376.

• Aspects of In Vitro Fatigue-Crack Growth in Human Cortical Bone: Time- and Cycle-Dependent Crack Growth by R. K. Nalla, J. J. Kruzic, J. H. Kinney, and R. O. Ritchie, Biomaterials, vol. 26, 2005, pp. 2183-2195.

• Mechanistic Aspects of Fracture and R-Curve Behavior in Human Cortical Bone by R. K. Nalla, J. J. Kruzic, J. H. Kinney, R. O. Ritchie, Biomaterials, vol. 26, 2005, pp. 217-231.

• Mechanistic Aspects of In Vitro Fatigue-Crack Growth in Dentin by J. J. Kruzic, R. K. Nalla, J. H. Kinney, and R. O. Ritchie, Biomaterials, vol. 26, 2005, pp. 1195-1204.

• Fracture in Human Cortical Bone: Local Fracture Criteria and Toughening Mechanisms by R. K. Nalla, J. S. St\F6lken, J. H. Kinney, and R. O. Ritchie, Journal of Biomechanics, vol. 38, 2005, pp. 1517-1525.

• Interface Structure and Atomic Bonding Characteristics in Silicon Nitride Ceramics by A. Ziegler, J. C. Idrobo, M. K. Cinibulk, C. Kisielowski, N. D. Browning, and R. O. Ritchie, Science, vol. 306, Dec. 2004, pp. 1768-1770.

• Effect of Aging on the Toughness of Human Cortical Bone: Evaluation by R-Curves by R. K. Nalla, J. J. Kruzic, J. H. Kinney, and R. O. Ritchie, Bone, vol. 35, Dec. 2004, pp. 1240-1246.

• Characteristic Dimensions and the Micro-Mechanisms of Fracture and Fatigue in Nano and Bio Materials by R. O. Ritchie, J. J. Kruzic, C. L. Muhlstein, R. K. Nalla, and E. A. Stach, International Journal of Fracture, vol. 128, 2004.

• On the Role of Grain-Boundary Films in Optimizing the Mechanical Properties of Silicon Carbide Ceramics by R. O. Ritchie, X.-F. Zhang, and L. C. De Jonghe, in Interfacial Engineering for Optimized Properties III, MRS Symposium Proceedings, vol. 819, 2004.

• Utilizing On-Chip Testing and Electron Microscopy to Study Fatigue and Wear in Polysilicon Strcutural Films by D. H. Alsem, E.A. Stach, C.L. Muhlstein, M.T. Dugger, and R.O. Ritchie, in Nanoscale Materials and Modeling: Relations Among Processing, Microstructure, and Mechanical Properties, MRS Symp. Proc., vol. 821, 2004.

• On the Electronic and Mechanical Instabilities in Ni50.9Ti49.1 by A. Mehta, V. Imbeni, R. O. Ritchie, and T. W. Duerig, Materials Science and Engineering A, vol. 378, 2004, pp. 130-137.

• On the Origin of Toughness of Mineralized Tissue: Microcracking or Uncracked-Ligament Bridging? by R. K. Nalla, J. J. Kruzic, and R. O. Ritchie, Bone, vol. 34, May 2004, pp. 790-798.

• Constitutive Modelling and Numerical Simulation of Multivariant Phase Transformation in Superelastic Shape-Memory Alloy by Y. Jung, P. Papadopoulos, and R. O. Ritchie, International Journal of Numerical Methods in Engineering, vol. 60, May 2004, pp. 429-460.

• Carbon Nanotubes as Nanoscale Mass Conveyors by B. C. Regan, S. Aloni, R. O. Ritchie, U. Dahmen, and A. Zettl, Nature, vol. 428, April 2004, pp. 924-927.

• On the In Vitro Fatigue Behavior of Human Dentin: Effect of Mean Stress by R.K. Nalla, J.H. Kinney, S.J. Marshall and R.O. Ritchie, J. Dent. Res., 2004;  83(3):211-215

• Crack-Size Effects on Cyclic and Monotonic Crack Growth in Polycrystalline Alumina: Quantification of the Role of Grain Bridging by J. J. Kruzic, R. M. Cannon, and R. O. Ritchie, Journal of the American Ceramic Society, 87 [1] (2004), pp. 93-103.

• Effects of Plastic Constraint on the Cyclic and Static Fracture Behavior of Metal/Ceramic Layered Structures by J. J. Kruzic, J. M. McNaney, R. M. Cannon, and R. O. Ritchie, Mechanics of Materials 36 (2004), pp. 57-72.

• Fracture and Fatigue Resistance of Mo-Si-B Alloys for Ultrahigh-Temperature Structural Applications by J. J. Kruzic, J. H. Schneibel, and R. O. Ritchie, Scripta Materialia, vol. 50, 2004, pp. 459-464.

• Fatigue of Polycrystalline Silicon for Microelectromechanical Systems: Crack Growth and Stability under Resonant Loading Conditions by C. L. Muhlstein, R. T. Howe, and R. O. Ritchie, Mechanics of Materials, vol. 36, 2004, pp. 13-33

• Effects of the Amorphous Oxide Intergranular Layer Structure and Bonding on the Fracture Toughness of a High Purity Silicon Nitride A. Ziegler, C. Kisielowski, M. J. Hoffmann, and R. O. Ritchie, in Structure-Property Relationships of Oxide Surfaces and Interfaces II, MRS Symp. Proc. vol. 751, 2003.

• Nanowicks: Nanotubes as Tracks for Mass Transfer by B.C. Regan, S. Aloni, B. Huard, A. Fennimore, R.O. Ritchie and A. Zettl, AIP Conference Proceedings 685, 612 (2003)

• Probing Structural Phase Transitions of Crystalline C60 via Resistivity Measurements of Metal Film Overlayers by C. W. Chang, B. C. Regan, W. Mickelson, R. O. Ritchie, and A. Zettl, Solid State Communications, vol. 128, 2003, pp. 359-363

• Ambient to high-temperature fracture toughness and cyclic fatigue behavior in Al-containing silicon carbide ceramics by R. Yuan, J.J. Kruzic, X.F. Zhang, L.C. De Jonghe, R.O. Ritchie, Acta Materialia, 51, 2003, pp. 6477-6491

• On the fracture of human dentin- Is it stress- or strain-controlled? by R.K. Nalla, J.H. Kinney, and R.O. Ritchie, J. Biomed. Mater.Res., 2003. 67A: 484-495

• On the Mechanical Behavior of Nitinol under Multiaxial Loading Conditions and In Situ Synchrotron X-Ray Diffraction by V. Imbeni, A. Mehta, S. W. Robertson, T. W. Duerig, A. Pelton, and R. O. Ritchie, Proceedings of the Shape Memory and Superelastic Technologies Conference 2003 (SMST-2003), SMST Society, Inc., Menlo Park, CA, 2003.

• Atomic-Resolution Transmission Electron Microscopy of a Y2O3-Containing Silicon Nitride Ceramic by A. Ziegler, C. Kisielowski, M. Hoffmann, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 86, 2003, pp. 1777-1785.

• Crack blunting, crack bridging and resistance-curve fracture mechanics indentin: effect of hydration by J. J. Kruzic, R. K. Nalla, J. H. Kinney, and R. O. Ritchie, Biomaterials, 24 (2003), pp. 5209-5221.

• Mechanical Relaxation of Localized Residual Stresses Associated with Foreign Object Damage by B. L. Boyce, X. Chen, J. O. Peters, J. W. Hutchinson, and R. O. Ritchie, Materials Science and Engineering A, vol. 349 (1-2), 2003, pp. 48-58.

• Mo-Si-B Alloy Development by J. H. Schneibel, J. J. Kruzic, R. O. Ritchie, Proceedings of the 17th Annual Conference on Fossil Energy Materials, 2003.

• High-Cycle Fatigue of Micron-Scale Polycrystalline Silicon Films: Fracture Mechanics Analysis of the Role of the Silicon/Silica Interface by C. L. Muhlstein and R. O. Ritchie, International Journal of Fracture, vol. 119/120, 2003, pp. 449-474.

• Texture in Tubes and Plates of the Superelastic/Shape-Memory Alloy Nitinol by S. W. Robertson, V. Imbeni, E. Notkina, H.-R. Wenk, and R. O. Ritchie, Proceedings of the Shape Memory and Superelastic Technologies Conference 2003 (SMST-2003), SMST Society, Inc., Menlo Park, CA, 2003.

• Abrasive Wear Behavior of Heat-Treated ABC-Silicon Carbide by X. F. Zhang, G. Y. Lee, Da Chen, R. O. Ritchie, and L. C. De Jonghe, Journal of the American Ceramic Society, vol 86 (8), 2003, pp. 1370-1378.

• Determining the Toughness of Ceramics from Vickers Indentations using the Crack-Opening Displacements: An Experimental Study, by J. J. Kruzic and R. O. Ritchie, Journal of the American Ceramic Society, vol. 86 (8), Aug. 2003, pp. 1433-1436.

• On the Influence of Mechanical Surface Treatments -- Deep Rolling and Laser Shock Peening -- on the Fatigue Behavior of Ti-6Al-4V at Ambient and Elevated Temperatures  by R. K. Nalla, I. Altenberger, U. Noster, G. Y. Liu, and B. Scholtes, and R. O. Ritchie, Materials Science and Engineering A, vol. 355, 2003, pp. 216-230.

• Effect of Orientation on the In Vitro Fracture Toughness of Dentin: The Role of Toughening Mechanisms by R. K. Nalla, J. H. Kinney, and R. O. Ritchie, Biomater., 2003; 24:3955-3968.

• On the In Vitro Fatigue Behavior of Human Dentin with Applications for Life Prediction by R. K. Nalla, V. Imbeni, J. H. Kinney, M. Staninec, S. J. Marshall, and R. O. Ritchie, J. Biomed. Mater. Res., 2003; 66A:10-20.

• On the In Vitro Fracture Toughness of Human Dentin by V. Imbeni, R. K. Nalla, C. Bosi, J. H. Kinney, and R. O. Ritchie, J. Biomed. Mater. Res., 2003; 66A:1-9.

• An Experimental Study of the Superelastic Effect in a Shape-Memory Nitinol Alloy under Biaxial Loading by J. M. McNaney, V. Imbeni, Y. Jung, P. Papadopoulos, and R. O. Ritchie, Mechanics of Materials, 2003.

• An In Situ Study of the Thermal Stability of Near-Surface Microstructures Induced by Deep Rolling and Laser-Shock Peening by I. Altenberger, E. A. Stach, G. Liu, R. K. Nalla, and R. O. Ritchie, Scripta Materialia, vol 48, 2003, pp. 1593-1598.

• Fracture and Fatigue Properties of Mo-Mo3Si-Mo5SiB2 Refractory Intermetallic Alloys at Ambient to Elevated Temperatures (25 C- 1300 C) by H. Choe, J. H. Schneibel, and R. O. Ritchie, Metallurgical and Materials Transactions A, vol. 34A (2), Feb. 2003, pp. 225-239.

• Mechanistic Fracture Criteria for the Failure of Human Cortical Bone by R. K. Nalla, J. H. Kinney, and R. O. Ritchie, Nature Mater., 2003; 2:164-168.

• High cycle fatigue of beta-titanium alloys by J.O. Peters, G. L�tjering, R.K. Nalla, I. Altenberger, and R.O. Ritchie, in: Proc. Fatigue 2002, Stockholm, Sweden, 2002.

• Fracture and Fatigue Behavior at Ambient and Elevated Temperatures of Alumina Bonded with Copper/Niobium/Copper Interlayers by J. J. Kruzic, R. A. Marks, M. Yoshiya, A. M. Glaeser, R. M. Cannon, and R. O. Ritchie, J.Am.Cerem. Soc., 85 [10], 2002, pp. 2531-41.

• Direct Mechanical Measurement of the Tensile Strength and Elastic Modulus of Multiwalled Carbon Nanotubes by B. G. Demczyk, Y. M. Yang, J. Cumings, M. Hetman, W. Han, A. Zettl, and R. O. Ritchie, Materials Science and Engineering A, vol. A334, Sept. 2002, pp. 173-178.

• Statistical Fracture Modeling: Crack Path and Fracture Criteria with Application to Homogeneous and Functionally Graded Materials by T. L. Becker, Jr., R. M. Cannon, and R. O. Ritchie, Engineering Fracture Mechanics, vol. 69, 2002, pp. 1521-1555.

• A Reaction-Layer Mechanism for the Delayed Failure of Micron-Scale Polycrystalline Silicon Structural Films Subjected to High-Cycle Fatigue Loading by C. L. Muhlstein, E. A. Stach and R. O. Ritchie, Acta Materialia, vol. 50, 2002, pp. 3579-3595.

• Mixed-Mode High-Cycle Fatigue Crack Growth Thresholds in Ti-6Al-4V: Role of Small Cracks by R. K. Nalla, J. P. Campbell and R. O. Ritchie, International Journal of Fatigue, vol. 24, 2002, pp. 1047-62.

• On the Application of the Kitagawa-Takahashi Diagram to Foreign-Object Damage and High-Cycle Fatigue by J. O. Peters, B. L. Boyce, X. Chen, J. M. McNaney, J. W. Hutchinson, and R. O. Ritchie, Engineering Fracture Mechanics, vol 69, 2002, pp. 1425-46.

• Effects of Microstructure on Mixed-Mode, High-Cycle Fatigue Crack Growth Thresholds in Ti-6Al-4V alloy by R. K. Nalla, J. P. Campbell and R. O. Ritchie, Fatigue & Fracture of Engineering Materials & Structures, Vol. 25(6), June 2002, pp.587-606.

• Influence of Microstructure on the High-Cycle Fatigue of Ti-6Al-4V: Bimodal vs. Lamellar Structures by R. K. Nalla, B. L. Boyce, J. P. Campbell, J. O. Peters, and R. O. Ritchie, Metallurgical and Materials Transactions A, vol. 33A (3), mid-March 2002, pp. 899-918.

• Mechanism of Fatigue in Micron-Scale Films of Polycrystalline Silicon for Microelectromechanical Systems by C. L. Muhlstein, E. A. Stach and R. O. Ritchie, Applied Physics Letters, vol. 80 (9), Mar. 4, 2002, pp.1532-1534.

• A physically-based abrasive wear model for composite materials by G.Y. Lee, C.K.H. Dharan, and R.O. Ritchie. Wear, 2002 (252), pp. 322-331.

• Imaging of the Crystal Structure of Silicon Nitride at 0.8 \C5ngstr\F6m Resolution by A. Ziegler, C. Kisielowski, and R. O. Ritchie, Acta Materialia , vol. 50 (3), Feb. 2002, pp. 565-574.

• Foreign-object damage and high-cycle fatigue: role of microstructure in Ti-6Al-4V by J.O. Peters and R.O. Ritchie, International Journal of Fatigue, 23 (2001), pp. 413-421.

• Cyclic Fatigue-Crack Growth and Fracture Properties in  Ti3SiC2Ceramics at Elevated Temperatures by D. Chen, K. Shirato, M. W. Barsoum, T. El-Raghy, and R. O. Ritchie, Journal of the American Ceramic Society, vol.84 (12), Dec. 2001, pp. 2914-2920.

• Effect of load ratio and maximum stress intensity on the fatigue threshold in Ti-6Al-4V by B. L. Boyce and R. O. Ritchie. Engineering Fracture Mechanics, vol. 68, 2001, pp. 129-147.

• High-cycle fatigue of single crystal silicon thin films by C. L. Muhlstein, S. Brown, and R. O. Ritchie, JMEMS, 2001.

• Foreign object damage and high-cycle fatigue of Ti-6Al-4V by J.O. Peters and R.O. Ritchie, Materials Science & Engineering A, 2001.

• High-cycle fatigue and durability of polycrystalline silicon thin films in ambient air by C.L. Muhlstein, S.B. Brown, and R.O. Ritchie. Sensors Actuators A (Physical), 2001.

• Fatigue-Crack Growth Behavior in the Superelastic and Shape-Memory Material Nitinol by A. L. McKelvey and R. O. Ritchie, Metallurgical and Materials Transactions A, vol. 32A (3A), Mid March 2001, pp. 731-743.

• High-cycle fatigue of polycrystalline silicon thin films in laboratory air by C.L. Muhlstein, S.B. Brown, and R.O. Ritchie. MRS Symposium Proceedings, 2000.

• A comparison of the mechanisms of fatigue-crack propagation behavior in a Zr-based bulk amorphous metal in air and an aqueous chloride solution by V. Schroeder, C.J. Gilbert, and R.O. Ritchie. Materials Science and Engineering, 2001.

• The residual stress state due to a spherical hard-body impact by B.L. Boyce, X. Chen, J.W. Hutchinson, and R.O. Ritchie. Mechanics of Materials, 2001.

• Structure of boron nitride nanotubules by B.G. Demczyk, J. Cumings, A. Zettl, and R.O. Ritchie. Applied Physics Letters, 2001.

• Finite crack kinking and T-stresses in fuctionally graded materials by T.L. Becker Jr., R.M. Cannon, and R.O. Ritchie. International Journal of Solids and Structures, 2001.

• Ambient to high temperature fracture toughness and fatigue-crack propagation behavior in a Mo-12Si-8.5B (at.%) intermetallic by H. Choe, D. Chen, J.H. Schneibel, and R.O. Ritchie. Intermetallics, 2001.

• Short and large crack, mixed-mode fatigue-crack growth thresholds in Ti-6Al-4V by R.K. Nalla, J.P. Campbell, and R.O. Ritchie. Part of HCF-6 conference papers, 2001.

• Mixed-mode, high-cycle fatigue-crack growth thresholds in Ti-6Al-4V: a comparison of large and small crack behavior by R.K. Nalla, J.P. Campbell, and R.O. Ritchie. Proc. of the sixth international conference on biaxial/multiaxial fatigue and fracture , 2001.

• Cyclic Fatigue-Crack Propagation in Sapphire in Air and Simulated Physiological Environments by B. Asoo, J. M. McNaney, Y. Mitamura, and R. O. Ritchie, Journal of Biomedical Materials Research, vol. 52, 2000, pp. 488-491.

• An approximate method for residual stress calculation in functionally graded materials by T.L.Becker Jr., R.M.Cannon, R.O.Ritchie, Mechanics of Materials 32(2000), pp. 85-97

• In situ measurement of fatigue crack growth rates in a silicon carbide ceramic at elevated temperatures using a DC potential system by D. Chen, C.J. Gilbert, and R.O. Ritchie. Journal of Testing and Evaluation, 2000.

• Effects of grain-boundary structure on the strength, toughness, and cyclic fatigue properties of a monolithic silicon carbide by D. Chen, X.F. Zhang, and R.O. Ritchie. Journal of the American Ceramic Society, 2000.

• Mixed-Mode, High-Cycle Fatigue-Crack Growth Thresholds in Ti-6Al-4V: Part II  Quantification of Crack-Tip Shielding by J. P. Campbell and R. O. Ritchie, Engineering Fracture Mechanics, vol. 67 (3), Oct. 2000, pp. 229-249.

• Mixed-Mode, High-Cycle Fatigue-Crack Growth Thresholds in Ti-6Al-4V: Part I  A Comparison of Large and Small Crack Behavior by J. P. Campbell and R. O. Ritchie, Engineering  Fracture Mechanics, vol. 67(3), Oct. 2000, pp. 209-227.

• Influence of Foreign Object Damage on Crack Initiation and Early Fatigue-Crack Growth in Ti-6Al-4V by J. O. Peters and R. O. Ritchie, Engineering Fracture Mechanics, vol. 67 (3), Oct. 2000, pp. 193-207.

• Time dependent  debonding of aluminum/alumina interfaces under cyclic and static loading   by J.J. Kruzic, J.M. McNaney, R.M. Cannon, and R.O. Ritchie. MRS Fall Meeting,  2000

• Role of the grain-boundary phase on the elevated-temperature strength, toughness, fatigue and creep resistance of silicon carbide sintered with Al, B and C by D. Chen, M.E. Sixta, X.F. Zhang, L.C. De Jonghe, and R.O. Ritchie. Acta Materialia, 2000

• Fracture and fatigue-crack growth behavior in Mo-12Si-8.5B intermetallics at ambient and elevated temperatures by H. Choe, D. Chen, J.H. Schneibel, and R.O. Ritchie. TMS Fall conference, 2000

• Mechanisms of high-temperature fatigue in silicon carbide ceramics by D. Chen, X.F. Zhang, and R.O. Ritchie. TMS Fall conference, 2000

• High-temperature cyclic fatigue-crack growth in monolithic Ti3SiC2 ceramics by K. Shirato, D. Chen, M.W. Barsoum, T. El-Ragy, and R.O. Ritchie. TMS Fall conference, 2000

• Fatigue-crack growth and fracture properties of coarse and fine-grained Ti 3 SiC 2 by C.J. Gilbert, D.R. Bloyer, M.W. Barsoum, T. El-Raghy, A.P. Tomsia and R.O. Ritchie. Scripta Materialia, 2000

• High-temperature cyclic fatigue-crack growth behavior in an in situ toughened silicon carbide by D. Chen, C.J. Gilbert, X.F. Zhang, and R.O. Ritchie. Acta Materialia, 2000

• Mechanics and mechanisms of fatigue damage and crack growth in advanced materials by R.O. Ritchie, C.J. Gilbert, and J.M. McNaney. International Journal of Solids and Structures, 2000

• Light Emission during Fracture of a Zr-Ti-Ni-Cu-Be Bulk Metallic Glass by C. J. Gilbert, J. W. Ager, III, V. Schroeder, J. P. Lloyd, J. R. Graham, and R. O. Ritchie, Applied Physics Letters, vol. 74, 1999, pp. 3809-3811.

• Mechanisms of fatigue-crack propagation in ductile and brittle solids by R.O.Ritchie, International Journal of Fracture 100, pp.55-83, 1999

• High-cycle fatigue of Ti-6Al-4V by R.O.Rtichie, D.L.Davidson, B.L.Boyce, J.P.Campbell and O.Roder, Fatigue Fract Engng Mater Struct 22, pp.621-631, 1999

• Fatigue-crack propagation behavior of ductile/brittle laminated composites by D.R. Bloyer, K.T. Venkateswara Rao, and R.O. Ritchie. Metallurgical and Materials Transactions A, 1999

• The effect of microstructure on fracture toughness and fatigue crack growth behavior in Gamma-Titanium Aluminide based intermetallics by J.P. Campbell, K.T. Venkateswara Rao, and R.O. Ritchie. Metallurgical and Materials Transactions A, 1999

• Mechanisms for fracture and fatigue-crack propagation in a bulk metallic glass by C.J. Gilbert, V. Schroder, and R.O. Ritchie. Metallurgical and Materials Transactions A, 1999

• On the fatigue behavior of gamma-based titanium aluminides: role of small cracks by J.J. Kruzic, J.P. Campbell, and R.O. Ritchie. Acta Metallurgica, 1999

• Fatigue-crack propagation in Nitinol, a shape-memory and superelastic endovascular stent material by A.L. Mckelvey, R.O. Ritchie. Biomedical Materials Research, 1999

• Effect of viscous grain bridging on cyclic fatigue-crack growth in monolithic ceramics at elevated temperatures J.M. McNaney, C.J. Gilbert, and R.O. Ritchie. Acta Metallurgica, 1999

• Effect of aqueous environment on fatigue-crack propagation behavior in a Zr-based bulk amorphous metal V. Schroeder, C.J. Gilbert, and R.O. Ritchie. Scripta Materialia, 1999

• Thresholds for high-cycle fatigue in a turbine engine Ti-6Al-4V alloy R.O. Ritchie, B.L. Boyce, J.P. Campbell, O. Roder, A.W. Thompson, and W.W. Milligan. International Journal of Fatigue, 1999

• Fracture Toughness and R-Curve Behavior of Laminated Brittle-Matrix Composites D. R. Bloyer, K. T. Venkateswara Rao, and R. O. Ritchie. Metallurgical and Materials Transactions A, vol. 29A (10) Oct. 1998, pp. 2483-2496.

• High frequency fatigue crack propagation behavior of a nickel-base turbine disk alloy S.A. Padula II, A. Shyam, R.O. Ritchie, and W.W. Milligan. International Journal of Fatigue, 1998

• High-temperature fracture and fatigue resistance of a ductile beta-TiNb reinforced gamma-TiAl intermetallic composite by K.T. Venkateswara Rao and R.O. Ritchie. Acta Metallurgica, 1998

• Transient fatigue-crack growth behavior following variable-amplitude loading in a monolithic silicon nitride ceramic by C.J. Gilbert and R.O. Ritchie. Engineering Fracture Mechanics, 1998

• Comparison of the corrosion behavior of a bulk amorphous metal, Zr41.2 Ti 13.8Cu12.5Ni10Be22.5 , with its crystallized form by V. Schroeder, C.J. Gilbert, and R.O. Ritchie. Scripta Materialia, 1998

• Fatigue of a Zr-Ti-Cu-Ni-Be bulk amorphous metal: stress/life and crack-growth behavior by C.J. Gilbert, J.M. Lippmann, and R.O. Ritchie. Scripta Materialia, 1998

• Fatigue-crack growth of small cracks in a directionally-solidified nickel aluminide with molybdenum additions by Moon-Hee Hong, J.M. McNaney, and R.O. Ritchie. Scripta Materialia, 1998

• On the quantification of bridging tractions during subcritical crack growth under monotonic and cyclic fatigue loading in a grain-bridging silicon carbide ceramic by C.J. Gilbert and R.O. Ritchie. Acta metallurgica, 1998.

• On the anomalous temperature dependence of fatigue-crack growth in gamma-based titanium aluminides by A.L. McKelvey, K.T. Venkateswara Rao, and R.O. Ritchie. Scripta Materialia, 1997.

• On the growth of small fatigue cracks in gamma-based titanium aluminides by J.P. Campbell, J.J. Kruzic, S. Lillibridge, K.T. Venkateswara Rao, and R.O. Ritchie. Scripta Materialia, 1997.

• On the role of microstructure in fatigue-crack growth of gamma-based titanium aluminides by J.P. Campbell, K.T. Venkateswara Rao, and R.O. Ritchie. Materials Science and Engineering, 1997.

• Laminated Nb/Nb3Al composites: effect of layer thickness on fatigue and fracture behavior by D.R. Bloyer, K.T. Venkateswara Rao, and R.O. Ritchie. Materials Science and Engineering, 1997.

• Fatigue crack growth resistance in SiC particulate and whisker reinforced P/M 2124 aluminum matrix composites by J.J. Mason and R.O. Ritchie. Materials Science and Engineering, 1997.

• Limitations on the use of the mixed-mode delaminating beam test specimen: Effects of the size of the region of K-dominance by T.L. Becker, J.M. McNaney, R.M. Cannon and R.O. Ritchie. Mechanics of Materials, 1997.

• Microstructural mechanisms of cyclic fatigue-crack propagation in grain-bridging ceramics by C.J. Gilbert, R.H. Dauskardt, and R.O. Ritchie. Ceramics International, 1997

• Fracture Toughness and Fatigue-Crack Propagation in a Zr-Ti-Ni-Cu-Be Bulk Metallic Glass by C. J. Gilbert, R. O. Ritchie, and W. L. Johnson, Applied Physics Letters, vol. 71, 1997, pp. 476-478

• Resistance-curve toughening in ductile/brittle layered structures: behavior in Nb/Nb 3 Al laminates by D.R. Bloyer, K.T. Venkateswara Rao, R.O. Ritchie, Materials Science and Engineering, 1996.

• Phase transformation in an in situ Nb-reinforced Nb3Al intermetallic composite by C.D. Bencher, L. Murgesh, K.T.T. Rao, and R.O. Ritchie. Intermetalics, 1996

• In Situ Toughened Silicon Carbide with Al-B-C Additions by J. J. Cao, W. J. MoberlyChan, L. C. DeJonghe, C. J. Gilbert, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 79 (2), Feb. 1996, pp. 461-469.

• Fatigue and Fracture of Pyrolytic Carbon: A Damage-Tolerant Approach to Structural Integrity and Life Prediction in "Ceramic" Heart Valve Prostheses by R.O. Ritchie, Journal of Heart Valve Disease, Vol. 5. Suppl. I, 1996.

• Fatigue-crack growth and fracture resistance of a two-phase TiAl alloy in duplex and lamella microstructures by K.T. Venkateswara Rao, Y.W. Kim, C.L. Muhlstein, R.O. Ritchie, Materials Science and Engineering, 1995.
  
  
• Fracture of Synthetic Diamond by M. D. Drory, R. H. Dauskardt, A. Kant, and R. O. Ritchie, Acta Metallurgica et Materialia, vol. 78, 1995, pp.3083-3088.

• Ductile-Reinforcement Toughening in g-TiAl Intermetallic-Matrix Composites under Monotonic and Cyclic Loading:  Effect on Fracture Toughness and Fatigue-Crack Propagation Resistance by K. T. Venkateswara Rao, G. R. Odette, and R. O. Ritchie, Journal of Applied Physics, vol. 42 (3), 1994, pp. 893-911.
  
  
• Powder processing of ductile-phase-toughened Nb-Nb3Al in situ composites by L. Murugesh, K.T. Venkateswara Rao, R.O. Ritchie, Materials Science and Engineering, 1994.
  

• Back-Face Strain Compliance and Electrical-Potential Crack Length Calibrations for the Disk-Shaped Compact-Tension DC(T) Specimen by C. J. Gilbert, J. M. McNaney, R. H. Dauskardt, and R. O. Ritchie, ASTM Journal of Testing and Evaluation, vol. 22 (2), March 1994, pp. 117-120.

• Cyclic Fatigue-Crack Propagation along Ceramic/Metal Interfaces by R. M. Cannon, B. J. Dalgleish, R. H. Dauskardt, T. S. Oh, and R. O. Ritchie, Acta Metallurgica et Materialia, vol. 39 (9), Sept. 1991, pp. 2145-2156.

• Cyclic Fatigue of Ceramics:  A Fracture Mechanics Approach to Subcritical Crack Growth and Life Prediction by R. O. Ritchie and R. H. Dauskardt, Journal of the Ceramic Society of  Japan, vol. 99 (10), Oct. 1991, pp. 1047-1062.

• A Comparison of Fatigue-Crack Propagation Behavior in Sheet and Plate Aluminum-Lithium Alloys by K. T. Venkateswara Rao, R. J. Bucci, K. V. Jata, and R. O. Ritchie, Materials Science and Engineering, vol. A141, 1991, pp. 39-48.

• Fatigue of Aluminum-Lithium Alloys by K. T. Venkateswara Rao and R. O. Ritchie, International Materials Reviews, vol. 37 (4), 1992, pp. 153-185.

• Cyclic Fatigue-Crack Propagation in Magnesia-Partially-Stabalized Zirconia Ceramics by R. H. Dauskardt, D. B. Marshall, and R. O. Ritchie, Journal of American Ceramic Society, vol. 73 (4), Sept. 1990, pp. 893-903.
  
  
• On the Interpretation of the Fractal Character of Fracture Surfaces by R. H. Dauskardt, F. Haubensak, and R. O. Ritchie, Acta Metallurgica et Materialia, vol. 38 (2), Feb. 1990, pp. 143-159.
  
  
• Spatially-Resolved Raman Spectroscopy of Transformed Zones in MgO-Partially-Stabilized Zirconia by R. H. Dauskardt, D. K. Veirs, and R. O. Ritchie, Journal of American Ceramic Society, vol. 72 (7), July 1989, pp. 1124-1130.

• Cryogenic Toughness of Commercial Aluminum-Lithium Alloys:  Role of Delamination Toughening by K. T. Venkateswara, W. Yu, and R. O. Ritchie, Metallurgical Transactions A, vol. 20A (3), March. 1989, pp. 485-497.
  
  
• Mechanisms of Fatigue Crack Propagation in Metals, Ceramics and Composites: Role of Crack-Tip Shielding by R. O. Ritchie, Materials Science and Engineering: A, vol. 103, 1988, pp. 15-28. (doi: 10.1016/0025-5416(88)90547-2)

• Fatigue Crack Propagation in ARALL Laminates:  Measurement of the Effect of Crack-Tip Shielding from Crack Bridging by R. O. Ritchie, W. Yu, and R. J. Bucci, Engineering Fracture Mechanics, vol. 32 (3), 1989, pp. 361-377.
  
  
• Stochastic Modelling of the Independent Roles of Particle Size and Grain Size in Transgranular Cleavage Fracture by T. Lin, A. G. Evans, and R. O. Ritchie, Metallurgical Transactions A, vol. 18A (5), April 1987, pp. 641-651.

• Fatigue Crack Propagation in Transformation-Toughened Zirconia Ceramic by R. H. Dauskardt, W. Yu, and R. O. Ritchie, Journal of American Ceramic Society, vol. 70 (10), Oct. 1987, pp. C248-252.

• Small Fatigue Cracks: A Statement of the Problem and Potential Solutions by R. O. Ritchie and J. Lankford, Materials Science and Engineering, vol. 84, 1986, pp. 11-16. (doi: 10.1016/0025-5416(86)90217-X)

• Fatigue Life Estimation Procedures for the Endurance of a Cardiac Valve Prosthesis: Stress/Life and Damage-Tolerant Analyses by R. O. Ritchie and P. Lubock, Journal of Biomechanical Engineering, Transactions of ASME, vol. 108, May 1986, pp. 153-160.

• A Statistical Model of Brittle Fracture by Transgranular Cleavage by Tsann Lin, A. G. Evans, R. O. Ritchie, Journal of Mechanics and Physics of Solids, vol. 34 (5), 1986, pp. 477-497.

• Effects of Microstructure on Fatigue Crack Propagation and Crack Closure Behavior in Aluminum Alloy 7150 by E. Zaiken and R. O. Ritchie, Materials Science and Engineering, vol. 70, 1985, pp. 151-160.
  
  
• On Macroscopic and Microscopic Analyses for Crack Initiation and Crack Growth Toughness in Ductile Alloys by R. O. Ritchie and A. W. Thomson, Metallurgical Transactions A, vol. 16A, 1985, pp. 233-248. (doi: 10.1007/BF02815305)
  
  
• On the Role of Compression Overloads in Influencing Crack Closure and the Threshold Condition for Fatigue Crack Growth in 7150 Aluminum Alloy by E. Zaiken and R. O. Ritchie, Engineering Fracture Mechanics, vol. 22, 1985, pp. 35-48. (doi: 10.1016/0013-7944(85)90157-2)

• The Propagation of Short Fatigue Cracks by S. Suresh and R. O. Ritchie, International Metals Reviews, vol. 29 (6), Dec 1984, pp. 445-476.

• Why Ductile Fracture Mechanics? by R. O. Ritchie, Journal of Engineering Materials and Technology, Transactions of ASME Series H, vol. 105 (1), Jan 1983, pp. 1-7.
  
  
• Fatigue Crack Propagation Thresholds for Long and Short Cracks in René 95 Nickel-Base Superalloy by J. F. McCarver and R. O. Ritchie, Materials Science and Engineering, vol. 55 (1), Aug. 1982, pp. 63-67. (doi: 10.1016/0025-5416(82)90084-2)
  
  
• A Geometrical Model for Fatigue Crack Closure Induced by Fracture Surface Roughness by S. Suresh and R. O. Ritchie, Metallurgical Transactions A, vol. 13A (9), Sept. 1982, pp. 1627-1631. (doi: 10.1007/BF02644803)

• Oxide-Induced Crack Closure:  An Explanation for Near-Threshold Corrosion Fatigue Crack Growth Behavior by S. Suresh S. Suresh, G. F. Zamiski, and R. O. Ritchie, Metallurgical Transactions A, vol. 12A (8), 1981, pp. 1435-1443.

• On the Influence of Gaseous Hydrogen in Decelerating Fatigue Crack Growth Rates in Ultrahigh Strength Steels by J. Toplosky and R. O. Ritchie, Scripta Metallurgica, vol. 15 (8), 1981, pp. 905-908.
  
  
• Critical Fracture Stress and Fracture Strain Models for the Prediction of Lower and Upper Shelf Toughness in Nuclear Pressure Vessel Steels by R. O. Ritchie, W. L. Server, and R. A. Wullaert, Metallurgical Transactions A, vol. 10A (10), Oct. 1979, pp. 1557-1570. (doi: 10.1007/BF02812022)

• Optimization of the Electrical Potential Technique for Crack Growth Monitoring in Compact Test Pieces Using Finite Element Analysis by G. H. Aronson and R. O. Ritchie, ASTM Journal of Testing and Evaluation,vol. 7 (4), July 1979, pp. 208-215.

• Near-Threshold Fatigue Crack Propagation in Steels by R. O. Ritchie, International Metals Reviews, vol. 20 (5/6), 1979, pp. 205-230.

• Mechanisms of Tempered Martensite Embrittlement in Low Alloy Steels by R. M. Horn and R. O. Ritchie, Metallurgical Transactions A, vol. 9A (8), Aug. 1978, pp. 1039-1053. (doi: 10.1007/BF02652208)

• Near-Threshold Fatigue Crack Propagation in Ultra-High Strength Steel:  Influence of Load Ratio and Cyclic Strength by R. O. Ritchie, Journal of Engineering Materials and Technology, Transactions of ASME Series H, vol. 99 (3), July 1977, pp. 195-204.
  
  
• Influence of Impurity Segregation on Temper Embrittlement and on Slow Fatigue Crack Growth and Threshold Behavior in 300-M High Strength Steel by R. O. Ritchie, Metallurgical Transactions A, vol. 8A (7), July 1977, pp. 1131-1140. (doi:10.1007/BF02667398)

• Influence of Microstructure on Near-Threshold Fatigue Crack Propagation in Ultra-High Strength Steel by R. O. Ritchie, Metal Science, vol. 11 (8/9), Aug. 1977, pp. 368-381. (doi: 10.1179/msc.1977.11.8-9.368)
  
  
• Evaluation of Toughness in AISI 4340 Alloy Steel Austenitized at Low and High Temperatures by R. O. Ritchie, B. Francis, and W. L. Server, Metallurgical Transactions A, vol. 7A (6), June1976, pp. 831-838. (doi:10.1007/BF02644080)
  
  
• On the Relationship between Critical Tensile Stress and Fracture Toughness in Mild Steel by R. O. Ritchie, J. F. Knott, and J. R. Rice, Journal of Mechanics and Physics in Solids, vol. 21 (6), June 1973, pp. 395-410. (doi: 10.1016/0022-5096(73)90008-2)

• Mechanisms of Fatigue Crack Growth in Low Alloy Steel by R. O. Ritchie and J. F. Knott, Acta Metallurgica, vol. 21 (5), May 1973, pp. 639-648. (doi: 10.1016/0001-6160(73)90073-4)

• Crack-Growth Monitoring: Optimisation of the Electrical Potential Technique using an Analogue Method by R. O. Ritchie, G. G. Garrett and J. F. Knott, International Journal of Fracture Mechanics, vol. 7, 1971, pp. 462-467.