摘要
本文着重研究了2024锻造铝合金经过T4及T6热处理后其单轴及多轴疲劳性能。采用了两种不同热处理方式制备出具有不同微结构的2024锻造铝合金,研究其在不同加载状态下的变形行为、疲劳机制及疲劳寿命。主要内容包括:对2024锻造铝合金进行单向拉伸、应力控制的单轴拉压疲劳及两种多轴拉扭疲劳试验,研究了加载状态与疲劳寿命的关系。结果表明,2024锻造铝合金材料的疲劳寿命对热处理和加载状态的敏感性很大,表现为在相同加载状态下2024-T4和2024-T6试样的寿命差别较大,以及同一热处理试样在不同应力幅值和不同加载路径下疲劳寿命差异大。
This article focuses on the changes in the fatigue properties of the forged 2024 aluminum alloy in the T4 and T6 heat-treated.The method of combining macro-and micro-test forged 2024 aluminum alloy with different microstructures were prepared to study the deformation behavior under different loading condition,the fatigue mechanism and fatigue life.The main contents include： uniaxial tension of forged 2024 aluminum,compression fatigue and multi-axis pull torsional fatigue tests.The relationship between load status and fatigue life between are stadied.The results show that the fatigue life of forged 2024 aluminum alloy are sensitive to heat treatment and loading state,expressed as the big difference in fatigue life of the T4 and T6 specimens in the same load state,as well as the large difference of fatigue life under different stress amplitude and different loading paths.
出处
《金属功能材料》
CAS
2013年第1期27-33,共7页
Metallic Functional Materials
