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建立了一类模拟金属材料动态再结晶的三维元胞自动机模型,该模型把宏观尺度的热加工参数和介观尺度的位错密度变化耦合在一起,考虑了动态回复、形核率、应变和初始晶粒尺寸的影响。利用这个模型可以追踪动态再结晶过程微观组织的变化,并且可以得到再结晶晶粒形态及晶粒的取向和大小。模拟结果与动态再结晶生长动力学理论符合较好。模型预测的再结晶微观组织及晶相形状和试验微结构吻合较好。
A new type of three-dimensional cellular automata model was established to simulate the dynamic recrystallization of metallic materials. The model combines the macro-scale thermal processing parameters with the changes of dislocation density at the mesoscopic scale. The dynamic recovery, nucleation rate, strain And the effect of initial grain size. The model can be used to trace the microstructure of the dynamic recrystallization process and to obtain the recrystallized grain morphology and grain orientation and size. The simulation results are in good agreement with the dynamic recrystallization growth kinetics theory. The predicted microstructure of the recrystallized microstructure and the shape of the crystalline phase agree well with the experimental microstructure.