中文摘要：

提出了一种将功率耗散图预测的动态再结晶热力参数范围与有限元模拟相结合,来模拟和预测金属锻造过程动态再结晶的方法.该方法通过二次开发引入到Deform 3D有限元软件系统后,利用该系统成功模拟和预测了TC11钛合金在工艺参数为（1020℃,0.1 s^-1）,（1050℃,0.1 s^-1）和（1050℃,10 s^-1）时,恒应变速率压缩过程中发生动态再结晶的区域及其变化规律,模拟预测结果与实验结果吻合较好.

英文摘要：

The window of thermomechanical parameters where dynamic recrystallization occurs can be predicted according to the power dissipation map based on dynamic materials model, and the distribution of thermo- mechanical parameters in metal forging can be calculated by using finite element （FE） simulation. Thus, the zone of dynamic recrystallization and its evolution in metal forging not only can be simulated and predicted, but also the forging process parameters where dynamic recrystallization occurs can be optimized by the combination of the win- dow of thermomechanical parameters where dynamic recrystallization occurs and finite element simulaton, which provides a new way for realizing the control of microstructure and property of forging. A method for simulating and predicting dynamic recrystallization in metal forging is proposed based on the combination of the thermome- chanical parameter window of dynamic recrystallization predicted by power dissipation map and finite element simulation, and the method is already integrated into the commercial FE software Deform 3D. The zone of dynamic recrystallization and its evolution in compression of titanium alloy TC 11 at process parameters （1020 ℃, 0.1 s^-1）, （1050 ℃, 0.1 s^-1）, （1050 ℃, 10 s^-1） and constant strain rate are successfully simulated and predicted by using the modified FE software Deform 3D. The simulated and predicted result is in good agreement with experiment.