预拉伸变形对欠时效7N01铝合金板材疲劳断裂的影响

田妮, 石旭, 刘威, 刘春城, 赵刚, 左良

Effect of Pre-Tension on the Fatigue Fracture of Under-Aged 7N01 Aluminum Alloy Plate

TIAN Ni, SHI Xu, LIU Wei, LIU Chuncheng, ZHAO Gang, ZUO Liang

表1 不同程度预拉伸变形后,欠时效态7N01铝合金板材中疲劳裂纹萌生阻力贡献值(λi)、疲劳裂纹扩展阻力贡献值(λp)及疲劳寿命贡献值(λ)的分析结果

Table 1 Contribution results of pre-tensile deformation on fatigue crack initiation resistance (λi), fatigue crack propagation resistance (λp), and fatigue life (λ) of under-aged 7N01 aluminum alloy plate after different pre-tensile deformations

Term 0% 3% 5% 8% 12% 16% 20% λi + + + + + + + + + + + + + + + + + + + + + + + λp + + + + + + + + + + + + + + + + + + λ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +