Paper Title:
Effect of Mean Stress on Fatigue Strength of Non-Combustible Magnesium Alloy
  Abstract

Effect of mean stress on fatigue strength at N=107 of non-combustible magnesium alloy AMX602B(X=Ca) was investigated. Rotating bending fatigue test and tension-compression fatigue test were carried out on specimens with a small hole or crack. It was clarified that the fatigue strength at N=107 of the specimen with the small hole was about 30-150% higher than that of the specimen with the small crack within the range of σm=0~100MPa. This is the reason why the fatigue strength at N=107 of the specimen with the small hole can be not threshold condition for crack propagation but crack initiation. The fatigue strength at N=107 of the specimens with the small hole decreased within the range of σm=100~195MPa due to a static small crack initiating from the small hole at first loading. The effect of mean stress on fatigue strength at N=107 both oh the specimens with the small hole and crack could be estimated using modified Goodman diagram.

  Info
Periodical
Key Engineering Materials (Volumes 353-358)
Edited by
Yu Zhou, Shan-Tung Tu and Xishan Xie
Pages
170-173
DOI
10.4028/www.scientific.net/KEM.353-358.170
Citation
K. Morishige, H. Noguchi, "Effect of Mean Stress on Fatigue Strength of Non-Combustible Magnesium Alloy", Key Engineering Materials, Vols. 353-358, pp. 170-173, 2007
Online since
September 2007
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Price
$32.00
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