摘要
建立了模拟多晶金属材料动态再结晶过程的二维元胞自动机模型,模型考虑了动态回复、位错密度及形核率等因素对动态再结晶的影响。利用这个模型可以得到整个形变过程的位错密度变化,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,并证实了动态再结晶的平均晶粒尺寸与初始晶粒的分布和大小无关的结论。
A two-dimensional cellular automaton model was developed to simulate dynamic recrystallization process of polycrystalline metals. The model considered the effects of dynamic recovery, dislocation density and nucleation rate on dynamic recrystallization. The variation of dislocation density, grain shape, orientation and mean size of recrystallization grain can be calculated during the whole deformation process by this model. The simulated results agree well with growth kinetics of dynamic recrystallization and validate the conclusion that the mean size of R-grain is independent of initial grain size and distribution.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2005年第4期120-124,共5页
Transactions of Materials and Heat Treatment
基金
大连市优秀青年科技人才基金(2001122)
东北特殊钢集团资助
关键词
动态再结晶
元胞自动机
微观组织演化
生长动力学
Dislocations (crystals)
Growth kinetics
Metal working
Microstructure
Nucleation
Polycrystalline materials
Recovery
