Mechanistic Approach for Creep-Fatigue Evaluation of 9Cr-1Mo-V-Nb Steel

[+] Author and Article Information
Yasuhide Asada, Masatsugu Yaguchi

Department of Mechanical Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113 Japan

J. Eng. Mater. Technol 117(4), 356-360 (Oct 01, 1995) (5 pages) doi:10.1115/1.2804725 History: Received May 16, 1995; Online November 27, 2007


A mechanistic model was developed to describe the creep-fatigue interaction of 9Cr-1Mo-V-Nb steel based on a damage mechanics approach. The model assumes that each of the fatigue and creep damage consists of basic damages with a size and density. The mechanism of the creep-fatigue interaction is considered to be an early growth of a size of fatigue basic damage from a creep basic damage formed prior to fatigue loading. The model interprets well the experimental creep-fatigue life under complex strain histories.

Copyright © 1995 by The American Society of Mechanical Engineers
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