基于热模拟试验,在获得变形温度为523～723 K(间隔50K),应变速率为0.001、0.01、0.1、1s-1喷射沉积超高强铝合金真应力-真应变数据的基础上,根据Arrhenius唯象本构方程计算出真应变为0.1、0.2和0.3时的材料常数(n、β、α、Q和lnA3).结果表明,不同真实应变下的材料常数不同.根据真应变为0.1～0.6(间隔0.1)下的材料常数计算结果,采用回归分析的方法,进行材料常数应变补偿回归分析.材料常数n、β、α、Q和lnA3回归分析的可决系数为0.993 62、0.963 27、0.986 82、0.986 92和0.985 29,回归分析的拟合优度高,很好地反映出材料常数随真应变的变化规律.在此基础上建立了不同材料常数的应变补偿回归模型.
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