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Proceedings Paper

Effect of high-temperature deformation on the mechanical properties of AISI 316 stainless steel
Author(s): Mohammed A. N. Shabara
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Paper Abstract

Accurate and reliable life predictions of mechanical components subjected to stress at elevated temperature may be difficult since the mechanical properties of the material are expected to change. The constitutive equations describing the creep behavior may also change due to softening or hardening processes caused by the applied loading conditions. In this paper the response of AISI Type 316 stainless steel at 650 degrees Celsius when subjected to a static tensile stress is examined. A testing technique has been applied to the test material to evaluate the effect of short periods of high temperature deformation on its mechanical properties. Round tensile specimens were subjected to constant tensile stress levels under high temperature of 650 degrees Celsius for periods of time varying from 2 to 8 hours. The specimens were then annealed and tested in tension under room temperature. Test results indicate that the AISI Type-316 exhibited hardening due to short period creep. Yield strength and ultimate tensile strength have increased by 58% and 20%, respectively, after 8 hours creep, over that of the virgin material. Creep was also found to cause a reduction in the ductility of the AISI Type-316 over the temperature and stress levels used in this investigation. Moreover, the changes in these properties were found to increase as creep time increased. From the present work, an empirical equation was obtained for predicting the amount of hardening in the material due to creep. Such an equation may be useful in more involved problems of combined creep and fatigue.

Paper Details

Date Published: 20 March 1997
PDF: 15 pages
Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); doi: 10.1117/12.269826
Show Author Affiliations
Mohammed A. N. Shabara, Kuwait Univ. (Kuwait)

Published in SPIE Proceedings Vol. 2921:
International Conference on Experimental Mechanics: Advances and Applications
Fook Siong Chau; C. T. Lim, Editor(s)

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