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采用Gleeble-1500D热模拟机进行热压缩变性试验,研究7N01铝合金在变形温度为340～460℃、应变速率为0.01～10.00 s-1条件下的流变应力行为。结果表明:变形温度和应变速率对合金流变应力有显著影响,流变应力随变形温度的升高而降低,随应变速率的增加而升高;合金在低应变速率(0.01,0.10,1.00 s-1)时主要为动态回复软化机制,而在高应变速率(10.00 s-1)时出现动态再结晶软化;7N01铝合金的高温流变行为可用Zener-Hollomon参数描述。
The hot compressive degeneration test was carried out on Gleeble-1500D thermal simulator to study the flow stress behavior of 7N01 aluminum alloy under the condition of deformation temperature of 340-460 ℃ and strain rate of 0.01-10.00 s-1. The results show that the deformation temperature and strain rate have significant influence on the flow stress of the alloy, and the flow stress decreases with the increase of the deformation temperature and increases with the increase of the strain rate. At the low strain rate (0.01, 0.10, 1.00 s -1), dynamic recrystallization softening is the main mechanism of dynamic recovery softening and dynamic recrystallization softening at high strain rate (10.00 s-1). The high temperature rheological behavior of 7N01 aluminum alloy can be described by Zener-Hollomon parameters.