Characterization of Elevated Temperature Crack Growth in Hastelloy-X Using Integral Parameters

[+] Author and Article Information
K. S. Kim

Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, Korea 790-784

R. H. Van Stone

General Electric Aircraft Engines, Cincinnati, OH 45215

J. Eng. Mater. Technol 117(3), 299-304 (Jul 01, 1995) (6 pages) doi:10.1115/1.2804543 History: Received March 22, 1993; Revised June 19, 1994; Online November 27, 2007


Linear elastic fracture mechanics approaches are not suitable for prediction of fatigue crack growth in the nonlinear regime at elevated temperatures. The objective of this paper is to investigate the ability of the integral parameters by Blackburn (J*), by Kishimoto et al. (Ĵ), and by Atluri et al. (ΔTp*, ΔTp) to correlate crack growth data of Hastelloy-X at elevated temperatures under nominally elastic and nominally plastic loading. Crack growth is analyzed using a finite element method, and the integral parameters are computed from the results of analysis. The experimental crack growth rates are correlated with these parameters. It is found that J*, Ĵ, and ΔTp* can correlate crack growth data within an acceptable accuracy.

Copyright © 1995 by The American Society of Mechanical Engineers
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