镍铝青铜高温热压缩流变行为研究

Flow stress behavior of Ni-Al Bronze under hot compression deformation

采用Gleeble-3500热模拟机,对镍铝青铜合金在变形温度为750℃~950℃,应变速率为0.01~10s-1条件下的进行等温热压缩变形实验。结果表明:在试验范围内,合金的流变应力随着应变温度的升高而降低,随着应变速率的增大而增大。用ZenerHollomon参数对镍铝青铜合金高温流变应力行为进行描述,并计算得到该合金的本构方程,其形变激活能Q为209.108KJ/mol。

The hot compression deformation experiment of Nickel-Aluminum Bronze alloy has been conducted at the temperature range of 750~950℃ and strain rate of 0.01~10 s-1 on Gleeble-3500 thermal simulator.The experimental results show that the flow stress of Nickel-Aluminum Bronze alloy decreases with the increase of temperature and enhances with the increase of strain rate. The constitutive equation has been established on the basis of stress-strain data by use of Zener-Hollomon parameter. The hot deformation activation energy Q is 209.108 kJ/mol.