3551 AZ31マグネシウム合金押出材の二段変動荷重下におけるき裂進展挙動(S12-3 軽金属合金,S12 先進性金属材料の疲労特性と組織)

概要

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In order to investigate fatigue property at two-step load conditions, rotate-bending fatigue tests were conducted on AZ31 extruded magnesium alloy with AZ31-30 (Grain size: 29μm) and AZ31-50(Grain size: 47μm). Then, the specific two-step load conditions were (δ_H,δ_L)=(160, 130) and (δ_H, δ_L)=(130, 100). As a result of evaluating with Modified Miner rule, the value of cumulative fatigue damage D of AZ31-50 were about 1.2. However, the value of AZ31-30 was lower than AZ31-50, it was about 1.0 except the case of δ_a=(130→100). Fatigue crack observation with replication technique and fracture observation by SEM were also carried out in order to investigate the results.
社団法人日本機械学会の論文
2006-09-15