5356铝合金热变形行为和热加工图

Hot Deformation Behavior and Hot Processing Map for 5356 Aluminum Alloy

通过热压缩试验研究了5356铝合金在变形温度350~500℃和应变速率0.01~10 s^-1的热成形性能,建立了5356铝合金本构方程和热加工图。结果表明:5356铝合金高温变形过程主要受位错的热激活能控制;热变形最佳工艺参数是变形温度460~500℃,应变速率0.01~0.05 s^-1;不稳定变形工艺参数是变形温度350~380℃和应变速率0.02~0.37 s^-1以及变形温度420~500℃和应变速率0.14~10 s^-1。

The thermal forming properties of 5356 aluminum alloy at the strain rate of 0.01-10 s^-1 and the deformation temperature of 350-500℃ were studied by the thermal compression test. The constitutive equation and working diagram of the5356 aluminum alloy were established. The results show that the high temperature deformation process of 5356 aluminum alloy is mainly controlled by the thermal activation energy of dislocation;the optimum process parameter of the thermal deformation is the deformation temperature of 460-500℃ and the strain rate of 0.01-0.05 s^-1;the unstable deformation process parameters have two regions, one is the deformation temperature of 350-380℃, the strain rate of 0.02-0.37 s^-1 and the other is the deformation temperature of 420-500℃, the strain rate of 0.14-10 s^-1.