Concerning a Creep Surface for an Aluminum Alloy

[+] Author and Article Information
W. N. Findley

Brown University, Providence, R. I.

J. S. Y. Lai

University of Utah, Salt Lake City; Brown University, Providence, R. I.

K. G. Nolte

Pan American Petroleum Corporation, Tulsa, Okla.; Brown University, Providence, R. I.

J. Appl. Mech 38(4), 1091-1094 (Dec 01, 1971) (4 pages) doi:10.1115/1.3408931 History: Received June 27, 1970; Revised February 04, 1971; Online July 12, 2010


Following creep under combined tension and torsion for 2 hr, probes of 5-min duration were made with different sequences along (a) a Mises ellipse through the loading point, and (b) along a possible creep surface suggested by the normality concept as applied to previous experiments. The results indicate that the sequence of probing makes considerable difference and the shape of a creep surface estimated from normality is not necessarily consistent with a definition of the creep surface as a surface of constant creep rate.

Copyright © 1971 by ASME
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