Abstract:The surface layer of binary Al-Zn alloy specimen, ever after a long time aging, remains
softer than the interior when the specimens are age-hardened at around room temperature after
quenching from high temperature. In this study, effects of the soft surface layer on the fatigue
strength of Al-Zn alloys were studied under repeated tensile loading. Vickers microharhness test
revealed that there existed less hardened region in the vicinity of grain boundary and specimens
surface, and that the region extends 50 to… Show more
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