The effect of load ratio on fatigue life and crack propagation behavior of an extruded magnesium alloy |
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| Authors: | S Ishihara AJ McEvily M Sato K Taniguchi T Goshima |
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| Affiliation: | aDepartment of Mechanical Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan;bInstitute of Materials Science, University of Connecticut, CT, USA |
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| Abstract: | Fatigue experiments were carried out in laboratory air using an extruded magnesium alloy, AZ31, to investigate the effect of load ratio on the fatigue life and crack propagation behavior. The crack propagation behavior was analyzed using a modified linear elastic fracture mechanics parameter, M. The relation crack propagation rate vs. M parameter was found to be useful in predicting fatigue lives at different R ratios. Good agreement between the estimated and the experimental results at each stress ratio was obtained. |
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| Keywords: | Fatigue Magnesium alloy Stress ratio S– N curves Crack propagation |
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