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在Gleeble-1500热模拟机上对01570铝合金进行等温热压缩实验,变形温度为300~450℃,应变速率为0.001~1 s-1,研究其热压缩变形的流变应力行为。结果表明:01570铝合金真应力-应变曲线在变形温度为300℃,应变速率为0.01~1 s-1的条件下,流变应力开始随应变增加而增大,达到峰值后趋于平稳,表现出动态回复特征;而在其他条件下,应力达到峰值后随应变的增加而逐渐下降,表现出动态再结晶特征。在用Arrhenius方程描述01570铝合金热变形行为时,其变形激活能Q为152.33 kJ.mol-1。
The hot compressive deformation of the 01570 aluminum alloy was simulated on a Gleeble-1500 thermal simulator at a deformation temperature of 300-450 ℃ and a strain rate of 0.001-1 s -1. The results show that the true stress-strain curve of 01570 aluminum alloy begins to increase as the strain increases at a deformation temperature of 300 ℃ and a strain rate of 0.01 to 1 s-1, and then tends to be stable after reaching the peak value. Out of dynamic response characteristics; and under other conditions, the peak stress after the stress decreases with increasing strain, showing dynamic recrystallization characteristics. When Arrhenius equation was used to describe the hot deformation behavior of 01570 aluminum alloy, its deformation activation energy Q was 152.33 kJ · mol-1.