在Gleeble 1500热模拟机上对一种新型Al-Mg-Si-Cu合金热压缩流变应力行为进行了研究,应变速率为 0.005~5 s-1、变形温度为350~550 ℃.结果表明:在较小应变(<0.15)出现一峰值后流变应力随应变的增加有所降低,表现出较明显的动态软化;在实验范围内,流变应力值随着应变速率减少和变形温度升高而降低,可用Zener-Hollomon参数的幂指数关系描述合金的流变应力行为,其变形激活能Q为236 kJ/mol.图5,参11. The hot compressive strain behavior of a new type of Al-Mg-Si-Cu alloy was studied on a Gleeble 1500 thermal simulator at a strain rate of 0.005-5 s -1 and a deformation temperature of 350-550 ° C. The results show that at The flow stress decreases with the increase of strain at a small strain (<0.15), and shows a more obvious dynamic softening. In the experimental range, the flow stress decreases with the decrease of strain rate and deformation temperature And the exponential relationship of the Zener-Hollomon parameter can be used to describe the flow stress behavior of the alloy. The deformation activation energy Q is 236 kJ / mol.