A Statistical Investigation of Microstructure and Crack Growth in Titanium Alloys

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

Pratt & Whitney Aircraft Group, Government Products Division, West Palm Beach, Fla.

D. W. Hoeppner

University of Toronto, Toronto, Canada

J. Eng. Power 103(1), 180-187 (Jan 01, 1981) (8 pages) doi:10.1115/1.3230693 History: Received December 27, 1979; Online September 28, 2009


Crack growth rates in various microstructures of Ti-6Al-4V and commercially pure titanium were studied using modified wedge opening load (WOL) specimens. Data were modeled using a Weibull four parameter survivorship function, selected because it meets the physical boundary conditions. The resulting models were exercised to determine the statistical significance of microstructure on the fatigue crack growth properties of these materials. Finally, inferences concerning gas turbine engine component design are considered.

Copyright © 1981 by ASME
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