TA15钛合金动态再结晶晶粒生长模型

Modeling of Grain Growth for Dynamic Recrystallization of TA15 Titanium Alloy

摘要:

从理论上分析TA15钛合金动态再结晶晶粒生长驱动力，提出动态再结晶晶粒生长等效反驱动力的概念。基于动态再结晶晶粒生长驱动力，建立（描述动态再结晶晶粒尺寸演变）的晶粒生长速率模型及晶粒尺寸模型。以TA15钛合金动态再结晶晶粒尺寸实验测定数据为例，采用遗传算法(GA)优化尺寸模型参数。结果表明，模型计算结果与实验数据能够达到较好的吻合，平均误差为7.4%。

Abstract:

Driving forces of grain growth during dynamic recrystallization of TA15 titanium alloy were analyzed theoretically and the equivalent negative driving forces concept for dynamic recrystallization grain growth was also proposed. Based on driving forces of dynamic recrystallization grain growth, a grain growth rate model and a grain size model describing grain size evolution of TA15 titanium alloy during dynamic recrystallization were established. Taking the experimental data of dynamic recrystallization grain size of TA15 titanium alloy as an example, the size model parameters were optimized by genetic algorithm (GA). The calculated results of grains size were in good agreement with the experimental values, whose average error was 7.4%