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RESEARCH PAPERS

Low Temperature Isothermal Strain in a Metastable Austenitic Stainless Steel Sheet

[+] Author and Article Information
Y. Oshida

Department of Mechanical and Aerospace Engineering, College of Engineering, Syracuse University, Syracuse, N.Y. 13244-1240

A. Deguchi

Yokohama Technical Institute, Mitsubishi Heavy Industries, Ltd., Yokohama, Japan

J. Eng. Mater. Technol 112(3), 362-365 (Jul 01, 1990) (4 pages) doi:10.1115/1.2903339 History: Received October 15, 1988; Revised August 28, 1989; Online April 29, 2008

Abstract

Low temperature stationary creep strain in a metastable austenitic stainless steel was studied at −162°C under various combinations of prestrain and stress ratio. It was found that the amount of transformed martensite during low temperature stressing increased with the number of thermal cycles as well as the degree of prestrain and stress ratio. When the applied stress exceeded 70 percent of the material yield strength at −162°C, the martensite volume increased significantly. At the same time, the stationary low temperature creep rate exceeded 1.8x10−10 (s−1 ), which would cause approximately 0.44 percent strain after continuous operation for a year.

Copyright © 1990 by The American Society of Mechanical Engineers
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