在变形温度为300-460℃、应变速率为0．001-1s^-1的条件下，采用Gleeble-1500型热模拟试验机对7850铝合金的热压缩变形行为进行了研究。结果表明：7850铝合金在热压缩变形中的流变应力随着温度的升高而减小，随着应变速率的提高而增大；该合金的热压缩变形流变应力可用Z参数公式来描述；在变形温度较高或应变速率较低时合金发生部分再结晶；该合金在460℃、应变速率为0．1s^-1的热变形条件下出现了明显的动态回复与动态再结晶现象。
The thermal compression deformation behavior of 7B50 aluminum alloy was investigated at the temperatures from 300 to 460 ℃ and strain rates from 0. 001 to 1 s^-1 on Gleeble-1500 thermal simulator. The results show that the flow stress decreased with increasing the deforming temperature and increased with increasing the strain rate during thermal compression deformation process. The flow stress of the alloy during thermal compression deformation could be described by the formula of Z parameter. Partial recystallization took place in the alloy deformed at higher deformation temperature or lower strain rate. The alloy showed significant dynamic recovery and recrystallization phenomena at 460 ℃ and strain rate of 0. 1 s^-1.
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