摘要
在Gleeble-1500热模拟机上,当变形温度为300-500℃、应变速率为0.01-10 s^-1、真应变为0-0.8时,采用圆柱体等温热压缩实验研究5083铝合金变形流变应力行为。通过分析流变应力指数函数中系数A、β与应变的关系,建立Zener-Hollomon参数的指数关系本构方程。运用该本构方程对5083铝合金不同应变速率、变形温度及应变条件下的流变应力进行预测,发现流变应力预测值与温升修正值吻合得相当好。
The flow stress behavior of 5083 aluminium alloy under hot compression deformation, in the temperature range of 300-500 ℃, strain rates of 0.01-10 s ^-1 and true strains of 0-0.8, was investigated by cylindrical compression tests on Gleeble 1 500 machine. The constitutive equations were presented considering the values of A and β as function of strain by Zener-Hollomon parameter in the exponential function form. Using the constitutive equations presented, the prediction of the flow stress in 5083 aluminium alloy as function of strain rate, temperature and strain shows to be in good agreement with the measured flow stresses corrected for temperature rise.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2007年第10期1667-1671,共5页
The Chinese Journal of Nonferrous Metals
基金
中国铝业公司科技发展基金资助项目(2006KJA08)
关键词
5083铝合金
热压缩变形
温升
流变应力
本构方程
5083 aluminium alloy
hot compression deformation
temperature rise
flow stress
constitutive equations
