7N01铝合金热压缩流变行为研究

Hot Deformation Behavior of 7N01 Aluminum Alloy

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 mechanical behavior of 7N01 aluminum alloy during high temperature plastic deformation was studied by isothermal compression in the temperature range of 340-460 ℃ and strain rate of 0.01-10.00 s-1 on Gleeble-1500D thermal mechanical simulator.The results showed that the flow stress of 7N01 was affected by both the strain rate and the deforming temperature,and the flow stress increased with increasing strain rate and decreasing deformation temperature.The main softening mechanism was dynamic recovery at lower strain rate（10.00 s-1）,while when the strain rate was 10.00 s-1,it transformed to be dynamic recrystallization.The flow stress of 7N01 aluminum alloy during high temperature deformation could be represented by Zener-Hollomon parameter.