The Fatigue-Crack Growth and Ductile Fracture Toughness Behavior of ASTM A387 Grade 91 Steel

[+] Author and Article Information
L. A. James

Westinghouse Hanford Company, Richland, Wash. 99352

K. W. Carlson

Westinghouse Electric Corp., Sunnyvale, Calif. 94088

J. Pressure Vessel Technol 107(3), 271-278 (Aug 01, 1985) (8 pages) doi:10.1115/1.3264449 History: Received May 05, 1985; Revised May 16, 1985; Online November 05, 2009


Fatigue-crack growth tests were conducted on three heats of wrought material plus one heat of weldment at temperatures of 24, 316, 427, 538, and 593° C. The effects of heat-to-heat variations, crack orientation, and thermal aging were studied. In addition, stress ratio effects were characterized at 427° C. The J -integral technique was used to determine the ductile fracture toughness at room temperature. Both the multiple specimen and unloading compliance techniques were used, and differences between the two methods are discussed.

Copyright © 1985 by ASME
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