Fatigue Crack Growth Resistance of Advanced Blade Materials

[+] Author and Article Information
D. A. Wilson

Tennessee Technological University

D. P. Deluca, B. A. Cowles

Pratt & Whitney Aircraft

M. A. Stucke

Air Force Wright Aeronautical Laboratories

J. Eng. Gas Turbines Power 109(2), 176-181 (Apr 01, 1987) (6 pages) doi:10.1115/1.3240021 History: Received March 07, 1986; Online October 15, 2009


The best measure of performance in a jet engine is the thrust-to-weight ratio. Cast single-crystal superalloys provide higher temperature capability and offer opportunities for significant improvements in future jet engine performance and durability. The highly anisotropic behavior of these advanced materials, which includes modulus, strength, and ductility variation with crystallographic orientation, pose potentially significant problems for design and life prediction of advanced turbine blades. The objective of this paper is to provide a better understanding of the crack growth behavior in this advanced turbine blade material by evaluating the effect of temperature, frequency, orientation, and thickness.

Copyright © 1987 by ASME
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