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Fatigue of 7075-T651 aluminum alloy under constant and variable amplitude loadings

โœ Scribed by E.U. Lee; G. Glinka; A.K. Vasudevan; N. Iyyer; N.D. Phan

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
508 KB
Volume
31
Category
Article
ISSN
0142-1123

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โœฆ Synopsis

The fatigue crack growth (FCG) behavior of 7075-T651 aluminum alloy was studied under constant and variable amplitude loadings in vacuum, air and 1% NaCl solution. In the study of constant amplitude loading fatigue, the stress ratios were 0.1 and 0.85 and the loading frequency was 10 Hz. In the study of variable amplitude loading fatigue, the load spectrums were tension type and tension-compression type, and the average loading frequency was about 5 Hz. The results of FCG tests, under constant and variable amplitude loadings, validated the unified two parameter driving force model, accounting for the residual stress and stress ratio effects on fatigue crack growth.

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