论文部分内容阅读
利用Gleeble3800热模拟试验机,在温度1123~1423 K和应变速率0.01~10 s-1的变形条件下对Ti-1023钛合金进行了等温压缩试验,并绘制了其流变应力曲线。基于热压缩数据,建立了该合金的Arrhenius双曲正弦型本构方程。根据动态材料模型理论,建立了合金在不同真应变下的热加工图。结果表明该合金的失稳区主要集中在高应变速率的区域内。最终通过Prasad判据确定了Ti-1023合金热变形时的失稳区和安全区。
The isothermal compression tests of Ti-1023 titanium alloy were carried out with Gleeble3800 thermal simulator at a temperature of 1123 ~ 1423 K and a strain rate of 0.01 ~ 10 s-1. The rheological stress curves of Ti-1023 titanium alloy were obtained. Based on the hot compression data, the Arrhenius hyperbolic sine constitutive equation of the alloy was established. According to the dynamic material model theory, the hot working diagram of the alloy under different true strain is established. The results show that the instability zone of the alloy mainly concentrated in the high strain rate region. Finally, the destabilization zone and safe zone of Ti-1023 alloy were determined by Prasad criterion.