论文部分内容阅读
利用Gleebe-3800热模拟机对304Cu奥氏体不锈钢进行单道次高温压缩试验,研究其在1000～1200℃、0.1～10 s-1条件的流变行为,利用Johnson-Cook方程建立该材料的热变形本构模型。研究表明,温度和应变速率对304Cu奥氏体不锈钢的流变应力影响显著,流变应力随温度升高而减小,随应变速率增加而增大;基于Johnson-Cook方程的本构模型预测值与实验值较吻合,平均绝对误差为8.67%。
The single-stage high-temperature compression test of 304Cu austenitic stainless steel was carried out on a Gleebe-3800 thermal simulator to study the rheological behavior of the 304Cu austenitic stainless steel at 1000-1200 ℃ and 0.1-10 s-1. The Johnson-Cook equation was used to establish the rheological behavior of the 304Cu austenitic stainless steel. Thermal deformation constitutive model. The results show that the temperature and strain rate have significant influence on the flow stress of 304Cu austenitic stainless steel. The flow stress decreases with increasing temperature and increases with increasing strain rate. Based on the predictive value of constitutive model of Johnson-Cook equation And the experimental value is more consistent, the average absolute error of 8.67%.