Application and Verification of Fatigue Life Calculation Methods for AZ91E-T6 Cast Magnesium Alloy Under Variable Amplitude Loading

[+] Author and Article Information
S. N. Perov

Mechanical Engineering Department, The University of Iowa, Iowa City, Iowa; Samara State Aerospace University, Samara, Russia

V. V. Ogarevic, R. I. Stephens

Mechanical Engineering Department, The University of Iowa, Iowa City, Iowa

J. Eng. Mater. Technol 115(4), 385-390 (Oct 01, 1993) (6 pages) doi:10.1115/1.2904235 History: Received June 01, 1991; Revised October 10, 1992; Online April 29, 2008


The goal of this research was to determine the applicability of commonly used fatigue life calculation methods for variable amplitude loading with sand cast AZ91E-T6 magnesium alloy using notched “keyhole” specimens. Commercially available fatigue life calculation software packages were used to calculate the fatigue crack “initiation” life (1 mm crack) and fatigue crack growth life corresponding to the experiments. The resulting correlation between experimental and calculated fatigue lives ranged from good to poor, and from conservative to nonconservative, depending on the analysis method used. It was shown that these fatigue life calculation methods can be used with this sand cast magnesium alloy but with certain apprehension.

Copyright © 1993 by The American Society of Mechanical Engineers
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