時効硬化Al合金6061-T6の確率疲労特性

概要

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In order to clarify the physical basis of scatter in the fatigue life of age-hardened Al alloy 6061-T6, rotating bending fatigue tests of smooth specimens were carried out at several stress levels. Fifteen or seventeen specimens were fatigued at each stress level and the initiation and propagation behaviors of major cracks were examined for all specimens. The statistical treatment of each set of lifetime data was performed by assuming the Weibull distribution. The lifetimes studied here were the fatigue life, the initiation life of 30μm crack and the crack propagation lives from 30μm up to 100μm, from 100μm up to 1 mm and from 1 mm to fracture, respectively. The scatter characteristics of these lifetimes were investigated based on the CV vs σ_a relation (CV : coefficient of variation, σ_a : stress amplitude).
一般社団法人日本機械学会の論文
1994-07-25