Journal Published Online: 01 November 1998
Volume 26, Issue 6

Measurement of Fatigue-Creep Dynamic Back Stress and Strain Rate Equation of a Fe-Ni-Cr Alloy

CODEN: JTEVAB

Abstract

A new testing method for measurement of dynamic back stress for fatigue-creep interaction with predominant creep at high mean stress is developed according to the principle of dropped stress creep. A series of dropped stress creep tests were performed repeatedly until an unlimited extensive incubation with zero creep rate at a given dropped stress occurred. The stress causing zero creep rate is defined as fatigue-creep dynamic back stress. The developed method was used successfully to measure the dynamic back stress for fatigue-creep interaction with predominant creep. The dynamic effective stress could yield a better description of the strain rate equation for the fatigue-creep interaction at high mean stress. Mean stress plays a predominant role in determining fatigue-creep strain rate.

Author Information

He, Q
Northern Jiaotong University, Beijing, China
Chen, G
University of Science and Technology Beijing, Beijing, China
Zhang, S
University of Science and Technology Beijing, Beijing, China
Pages: 2
Price: $25.00
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Stock #: JTE12120J
ISSN: 0090-3973
DOI: 10.1520/JTE12120J