(1. 苏州有色金属加工研究院，苏州 215026；2. 湖南大学 材料科学与工程学院，长沙 410082)
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
、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。
关键字: 5083铝合金；热压缩变形；温升；流变应力；本构方程
（1. Suzhou Institute for Non-ferrous Metals Processing Technology,Suzhou 215026, China;2. School of Materials Science and Engineering, Hunan University,2. School of Materials Science and Engineering, Hunan University,2. School of Materials Science and Engineering, Hunan University,Changsha 410082, China）
Abstract: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
Key words: 5083 aluminium alloy; hot compression deformation; temperature rise; flow stress; constitutive equations
