A Study of the Role of Grain-Boundary Engineering
in Promoting High-Cycle Fatigue Resistance
Nickel & Titanium base
superalloys are widely used in turbine applications which require their
high temperature strength and resistance to environmental attack.
Despite the wealth of recent research on the high-cycle fatigue (HCF)
of Ti and Ni alloy turbine engine blades and disks, there have been few
studies on ways to improve the HCF resistance of these alloys through
Objective: To examine the feasibility of using grain-boundary engineering techniques to enhance the HCF resistance of Ni and Ni-base superalloys.
Approach: Using strain/anneal cycles to increase the proportion and contiguity of special "grain boundaries" in high-purity nickel and a nickel-base superalloy ME3, characterization of the effect of such microstructures on the stress/life fatigue properties and the large- and small- fatigue-crack propagation resistance.
|Last updated 04/12/06 by Yong Gao ([email protected])|
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.