Al-Mg-Si-Cu合金在热压缩变形中的流变应力

来源期刊：中南大学学报(自然科学版)2006年第5期

论文作者：甘卫平 刘泓 杨伏良 王义仁

文章页码：841 - 845

关键词：Al-Mg-Si-Cu合金;热压缩变形;流变应力

Key words：Al-Mg-Si-Cu alloy; hot compression deformation; flow stress

摘    要：在Gleeble-1500热模拟试验机上对Al-0.80Mg-0.63Si-0.61Cu合金进行等温热压缩试验,研究其在高温压缩变形中的流变应力行为。研究结果表明:流变应力随应变速率的增大而增大,随变形温度的升高而降低,在高应变速率和较低温度条件下,应力出现锯齿波动,呈不连续再结晶特征;该铝合金热压缩变形的流变应力行为可用包含Arrhenius项的Zener-Hollomon参数来描述,其变形激活能为176.54 kJ/mol。

Abstract: The behavior of the flow stress of alloy Al-0.8Mg-0.63Si-0.61Cu during high temperature compression deformation was studied by isothermal compression test on Gleeble-1500 thermal-machanical simulator. The results show that the flow stress increases with the increase of the strain rate, and decreases with the increase of the deforming temperature. The saw tooth fluctuation of the flow stress at higher strain rates and lower temperatures indicates the discontinuous dynamic recrystallization. The flow stress of the aluminum alloy during hot compression deformation can be described by using Zener-Hollomon parameter including Arrhenius item, and the deformation activation energy is 176.54 kJ/mol.