摘要
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 3-dimensional cellular automaton model was developed to simulate dynamic recrystallization of the metallic material.The model coupled the heat process parameters at the macroscopic scale with the dislocation development at the micro-scopic scale.The influence of dynamic recovery,nucleation rate,strain,and initial grain size was considered.It could track the microstructural evolution of dynamic recrystallization process,and calculate the morphology,orientation and mean grain size of recrystallization grain.The simulated results agree well with the growth kinetics of dynamic recrystallization.The predictions and crystal topology show very good agreement with the experimental results.
出处
《金属热处理》
CAS
CSCD
北大核心
2009年第4期96-99,共4页
Heat Treatment of Metals
基金
大连市优秀青年科技人才基金项目(2001-122)
关键词
动态再结晶
三维元胞自动机
微观组织
生长动力学
dynamic recrystallization
3-dimensional cellular automaton
microstructure
growth kinetics
