摘要
利用元胞自动机模型研究金属热成形过程中动态回复与再结晶现象,是目前业界关注的热点之一。文章介绍了元胞自动机模型的理论基础和工作原理,并根据叶片模锻成形的特点,综合考虑应变速率、变形温度对再结晶形核率与平均晶粒尺寸,以及终锻冷却对叶片锻件最终组织的影响,在DEFORM-3D平台上,成功地仿真了叶片模锻过程中的微观组织演变,得到了同经典理论分析和物理实验结果吻合较好的动态再结晶动力学特征。
Cellular Automata are used to investigate dynamic recovery and recrystallization in metal hot-deformed, which is one of the hotspots people pay attention to. In this paper, the basic theory and work principle of cellular automata were introduced concisely. The influence of strain-rate and temperature on the number of nucleation and the mean size of R-grain, as well as the influence of cooling on ultimate microstructure of blade after forging finished off were considered. The microstructure evolution was simulated successful based on the DEFORM-3D. The simulated results agree well with growth kinetics of dynamic recrystallization of classical theory and physical experiment.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2009年第3期88-92,共5页
Journal of Plasticity Engineering
关键词
叶片
模锻
动态再结晶
元胞自动机
数值模拟
blade
die-forging
dynamic recrystallization
cellular automata
numerical simulation
