Al-10Zn-1.9Mg-1.7Cu-0.12Zr高锌铝合金热压缩变形流变应力本构方程

The flow stress constitutive equation of high-zinc Al-10Zn-1.9Mg-1.7Cu-0.12Zr aluminum alloy during hot compression deformation

利用Gleebble-3500热模拟机对Al-10Zn-1.9Mg-1.7Cu-0.12Zr高锌铝合金进行热压缩变形试验,获得该合金在不同变形温度和应变速率条件下的流变应力本构方程。结果表明:Al-10Zn-1.9Mg-1.7Cu-0.12Zr高锌铝合金的高温流变行为可用包含Arrhenius项的Zener-Hollomon参数来描述,在获得的流变应力本构方程中A、α和n值分别为4.0934×1016 s-1、0.01145 MPa-1和5.961;其热变激活能为221 569.977 J/mol。

The flow stress constitutive equation of high-zinc Al-10Zn-1. 9Mg-1. 7Cu- 0.12Zr aluminum alloy was acquired by the hot compression deformation experiment at dif- ferent deformation temperatures and strain rates with the Gleeble-3500 material simulation machine. The results show that the flow stress of Al-10Zn-1.9Mg-1.7Cu-0.12Zr aluminum alloy during high temperature deformation process could be represented by Zener-Hollomon parameters including the term Arrhenius ,A,α and n in the flow stress constitutive equation are 4. 0934 × 1 016 s^-1,0. 011 45 MPa^-1 and 5. 961 respectively. The hot deformation activa- tion energy is 221 569. 977 J/tool.