SiC颗粒增强铝基复合材料的热变形本构方程及其优化

Optimization of General Constitutive Equation for Hot Deformation of SiC Particle Reinforced Al Matrix Composites

通过热压缩试验研究了SiC颗粒增强铝基复合材料在应变速率为0．001—1s^-1，变形温度为713—773K时的热成形性能，并在试验数据分析的基础上，引入Zener—Hollomon参数建立了用于描述复合材料高温变形行为的本构关系模型，通过分析比较和对本构方程的进一步优化，提高了颗粒增强型铝基复合材料本构方程的拟合精度，使得计算值更接近于试验值。

Deformation behavior of SiC particle reinforced A1 matrix composites has been investigated through the hot compression test carried out in the temperature 713 -773K and strain rate 0. 001 -1 s^-1. Based on the experimental data and Zener-Hollomon parameter, the constitutive equation is modeled and discussed. Through the analysis, the constitutive equation is further optimized. As a result, the new optimization equation can improve the validity of application.