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利用变形态Ti40合金在变形温度范围为1223～1323K和应变速率范围为0.001～1.0s-1的不同应变下的热压缩实验数据研究了该材料的高温流变应力模型。利用实验数据分析了Arrhenius型方程对变形态Ti40合金的适用性,结果表明,采用双曲正弦型Arrhenius方程建立该材料的高温流变应力模型是适宜的,并通过对双曲正弦方程进行温度补偿及引入路径变量因子改进了模型。通过计算复相关系数和平均相对误差绝对值对该模型进行误差分析,经过改进的变形态Ti40合金的高温流变应力模型具有良好的精度。
The high temperature flow stress model of Ti40 alloy was studied by using the experimental data of thermal compression under different strain of strain range 1223-1323K and strain rate of 0.001-1.0 s-1. The experimental data are used to analyze the applicability of the Arrhenius equation to the deformed Ti40 alloy. The results show that it is suitable to establish the high temperature flow stress model by the hyperbolic sine Arrhenius equation. Through the temperature compensation of the hyperbolic sine equation And introduced the path variable factor to improve the model. The error was analyzed by calculating the complex correlation coefficient and the absolute value of the average relative error. The improved high temperature flow stress model of the deformed Ti40 alloy has good accuracy.