Gamma-Based TiAl Intermetallics

Research program description

Online Papers

Researchers

Publications

• K. T. Venkateswara Rao, G. R. Odette, and R. O. Ritchie, "On the Contrasting Role of Ductile-Phase Reinforcements in the Fracture Toughness and Fatigue-Crack Propagation Resistance of TiNb/g-TiAl Intermetallic-Matrix Composites," Acta Metallurgica et Materialia, vol. 40(2), 1992, pp. 353-361.
• K. T. Venkateswara Rao and R. O. Ritchie, "Fatigue-Crack Propagation Resistance of Ductile TiNb-Reinforced g-TiAl Intermetallic-Matrix Composites," Materials Science and Engineering A, vol. A153, 1992, pp. 479-485.
• K. T. Venkateswara Rao and R. O. Ritchie, "Microstructural Effects on Fatigue-Crack Growth Behavior in g-TiAl/b-TiNb Intermetallic Composites," in Intermetallic Matrix Composites II, MRS Symposium Proceedings, D. Miracle, J. Graves, and D. Anton, eds., vol. 273, Materials Research Society, Pittsburgh, PA, 1992, pp. 127-134.
• W. O. Soboyejo, K. T. Venkateswara Rao, S. M. L. Sastry, and R. O. Ritchie, "Strength, Fracture and Fatigue Behavior of Advanced High-Temperature Intermetallics Reinforced with Ductile Phases," Metallurgical Transactions A, vol. 24A (3), March 1993, pp. 585-600.
• K. T. Venkateswara Rao, G. R. Odette, and R. O. Ritchie, "The Role of Interface and Reinforcement Properties on the Fracture and Fatigue Resistance of Ductile-Phase Toughened g-TiAl Composites," in Structural Intermetallics, Proceedings of First International Symposium, R. Darolia, J. J. Lewandowski, C. T. Liu, P. L. Martin, D. B. Miracle, and M. V. Nanthal, eds., TMS, Warrendale, PA, 1993, pp. 829-835.
• R. O. Ritchie, K. T. Venkateswara Rao, and R. H. Dauskardt, "Fatigue-Crack Propagation in Advanced Materials," in Fatigue '93, Proceedings of the Fifth International Conference on Fatigue and Fatigue Thresholds, J.-P. Baïlon and J. I. Dickson, eds., EMAS Ltd., Warley, U.K., vol. 3, 1993, pp. 1899-1918.
• K. T. Venkateswara Rao and R. O. Ritchie, "Fracture and Fatigue Considerations in the Development of Ductile-Phase Reinforced Intermetallic-Matrix Composites," in Fatigue and Fracture of Ordered Intermetallics and Composites, W. O. Soboyejo, T. S. Srivatsan, and D. L. Davidson, eds., TMS, Warrendale, PA, 1994, pp. 3-12.
• K. T. Venkateswara Rao, G. R. Odette, and R. O. Ritchie, "Ductile-Reinforcement Toughening in g -TiAl Intermetallic-Matrix Composites under Monotonic and Cyclic Loading: Effect on Fracture Toughness and Fatigue-Crack Propagation Resistance," Acta Metallurgica et Materialia, vol. 42 (3), 1994, pp. 893-911.
• K. T. Venkateswara Rao, Y.-W. Kim, C. H. Muhlstein, and R. O. Ritchie, "Fatigue-Crack Growth and Fracture Resistance of Duplex and Lamellar Microstructures in a Two-Phase (g +a ₂) TiAl Intermetallic Alloy", Materials Science and Engineering A, vol. 192/193, 1995, pp. 474-482.
• K. T. Venkateswara Rao, Y.-W. Kim, and R. O. Ritchie, "High-Temperature Fatigue-Crack Growth Behavior in a Two-Phase (g +a ₂) TiAl Intermetallic Alloy", Scripta Metallurgica et Materialia, vol. 33 (3), 1995, pp. 459-465.
• K. T. Venkateswara Rao and R. O. Ritchie, "Toughness and Fatigue-Crack Growth in g-TiAl Intermetallic Composites at Ambient and High Temperatures," in Fatigue and Fracture of Ordered Intermetallics and Composites II, W. O. Soboyejo, T. S. Srivatsan, and R. O. Ritchie, eds., TMS, Warrendale, PA, 1995, pp. 327-338.
• K. T. Venkateswara Rao, Y.-W. Kim, and R. O. Ritchie, "Fatigue-Crack Growth Behavior in a Dual-Phase (g +a ₂) TiAl Intermetallic Alloy at Elevated Temperatures", in Gamma Titanium Aluminides, Proceedings of the International Symposium, Y.-W. Kim, R. Wagner and M. Yamaguchi, eds., TMS, Warrendale, PA, 1995, pp. 893-901.
• J. P. Campbell, K. T. Venkateswara Rao and R. O. Ritchie, "Fatigue-Crack Growth and Fracture Behavior in a XD™ g-TiAl Alloy with a Fine Lamellar Microstructure," in Fatigue '96, Proceedings of the Sixth International Congress on Fatigue, G. Lüterjing and H. Nowack., eds., Pergamon Press, Oxford, U.K., vol III, 1996, pp. 1779-1784.
• A. L. McKelvey, J. P. Campbell, K. T. Venkateswara Rao and R. O. Ritchie, "High Temperature Fatigue-Crack Growth Behavior in an XD™ g-TiAl Intermetallic Alloy," in Fatigue '96, Proceedings of the Sixth International Congress on Fatigue, G. Lüterjing and H. Nowack, eds., Pergamon Press, Oxford, U.K., vol III, 1996, pp. 1743-1748.
• K. T. Venkateswara Rao, C. J. Gilbert, and R. O. Ritchie, "Damage Tolerance in Intermetallic and Ceramic Materials at Ambient and Elevated Temperatures: Role of Extrinsic vs. Intrinsic Mechanisms," in Processing and Design Issues in High Temperature Materials, N. S. Stoloff and R. H. Jones, eds., The Minerals, Metals and Materials, Warrendale, PA, 1996, pp. 209-220.
• J. P. Campbell, A. L. McKelvey, S. Lillibridge, K. T. Venkateswara Rao and R. O. Ritchie, "Fracture and Fatigue in g-Based TiAl Alloys with Fine Lamellar Microstructures: Long and Small Crack Behavior," in Deformation and Fracture of Ordered Intermetallic Materials III, W. O. Soboyejo, T. S. Srivatsan, and H. L. Fraser, eds., TMS, Warrendale, PA, 1996, pp. 141-157.
• J. P. Campbell, J. J. Kruzic, S. Lillibridge, K. T. Venkateswara Rao, and R. O. Ritchie, "On the Growth of Small Fatigue Cracks in g-Based Titanium Aluminides," Scripta Materialia, vol. 37 (5) Sept. 1997, pp. 707-712.
• A. L. McKelvey, K. T. Venkateswara Rao, and R. O. Ritchie, "On the Anomalous Temperature Dependence of Fatigue-Crack Growth in g-Based Titanium Aluminides," Scripta Materialia, vol. 37 (11), 1997, pp. 1797-1803.
• J. P. Campbell, K. T. Venkateswara Rao, and R. O. Ritchie, "On the Role of Microstructure in Fatigue-Crack Growth of g-Based Titanium Aluminides," Materials Science and Engineering A, vol. A239-240, 1997, pp. 722-728.
• A. L. McKelvey, K. T. Venkateswara Rao, and R. O. Ritchie, "High-Temperature Fracture and Fatigue-Crack Growth Behavior of an XD™ Gamma-Based Titanium Aluminide Intermetallic Alloy," Metallurgical and Materials Transactions A, 1998, in review.
• K. T. Venkateswara Rao, and R. O. Ritchie, "High-Temperature Fracture and Fatigue Resistance of a Ductile b-TiNb Reinforced g-TiAl Intermetallic Composite," Acta Materialia, vol. 46 (12), 1998, pp. 4167-4180.
• R. O. Ritchie, "Damage Tolerance in Intermetallics and Ceramics: Fracture vs. Fatigue Behavior", in Proceedings of the International Symposium on Designing, Processing, and Properties of Advanced Engine Materials (ISAEM-97), T. Kobayashi, M. Umemoto, and M. Morinaga, eds., Japan Society for the Promotion of Science, Toyohashi City, Japan, AEM vol. 156, 1998, pp. 25-35.
• J. P. Campbell, K. T. Venkateswara Rao, and R. O. Ritchie, "On the Effect of Microstructure on Fracture Toughness and Fatigue-Crack Growth Behavior in g-Based Titanium Aluminide Intermetallics," Metallurgical and Materials Transactions A, vol. 30A (3), 1999, 563-577.
• J. J. Kruzic, J. P. Campbell, and R. O. Ritchie, "On the Fatigue Behavior of g-Based Titanium Aluminides: Role of Small Cracks," Acta Materialia, vol 47 (3), 1999, 801-816.
• J. J. Kruzic, J. P. Campbell and R. O.  Ritchie, "Fatigue-Crack Propagation in Gamma-Based Titanium Aluminide Alloys at Large and Small Crack Sizes,"accepted to be in High-Temperature Ordered Intermetallics VIII, MRS Symposium Proceedings, Materials Research Society, Pittsburgh, PA, 1998.
• J. J. Kruzic, J. P. Campbell, A. L. McKelvey, H. Choe, and R. O. Ritchie, "The Contrasting Role of Microstructure in Influencing Fracture and Fatigue-Crack Growth in g-Based Titanium Aluminides and Large and Small Crack Sizes," accepted to be in Gamma Titanium Aluminides, 1999.