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基于热模拟试验,在获得变形温度为523~723 K(间隔50 K),应变速率为0.001、0.01、0.1、1 s-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ln A3)。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ln A3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。
Based on the thermal simulation tests, based on the true stress-strain data of ultra-high strength Al-deposited sprayed alloy with deformation temperature of 523-723 K (interval of 50 K) and strain rate of 0.001, 0.01, 0.1, 1 s- The Arrhenius phenomenological constitutive equation calculates material constants (n, β, α, Q, and ln A3) at true strain of 0.1, 0.2, and 0.3. The results show that the material constants at different real strains are different. According to the calculation results of the material constants under the real strain of 0.1 ~ 0.6 (interval 0.1), the regression analysis of material constant strain compensation was carried out by the method of regression analysis. The coefficients of determination for the material constants n, β, α, Q and ln A3 were 0.993 62, 0.96 3 27, 0.986 82, 0.986 92 and 0.985 29, and the goodness of fit of the regression analysis was high, which well reflected the material constants With the true variation of the law. Based on this, a strain compensation regression model of different material constants is established.