Influence of Microstructure on Fatigue Crack Propagation Rate of Aluminum Alloys.

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作者：
Albrecht, Joachim
Luetjering, Gerd
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来源：
Deutsche Luft- und Raumfahrt, Forschungsbericht | 1977年 / 77-7期
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TG146.2+1 [铝]; TF821 [铝];
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摘要：
The influence of microstructure on fatigue crack propagation rate was investigated for three different AlZnMgCu-alloys with similar tensile properties. Tests were performed under vacuum and in laboratory air to estimate the influence of environment. A pronounced influence of microstructure on crack propagation rate was found for fatigue under vacuum as well as in air. Crack propagation along slip bands in a high-purity underaged alloy exhibited the slowest, crack propagation by void coalescence in commercial alloys the highest crack propagation rate.
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