采用圆柱试样在Gleeble-1500热模拟机上进行恒温和恒速压缩变形实验, 变形温度范围为350～450 ℃, 应变速率范围为0.001～0.1 s-1. 研究了7055铝合金在高温塑性变形过程中流变应力的变化规律, 确定了合金的变形激活能Q和应力指数n. 结果表明, 流变应力随变形温度的升高而降低, 随应变速率的提高而增大. 可用应力-应变速率方程来描述7055铝合金高温压缩变形时的热变形行为. 这种合金在350～450 ℃温度范围内的热变形组织为发生了动态回复并伴随有少量再结晶的组织.
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