纯铜动态再结晶过程的元胞自动机模拟  

MODELING DYNAMIC RECRYSTALLIZATION OF PURE COPPER USING CELLULAR AUTOMATON METHOD

作　　者：卢瑜[1] 张立文[1] 邓小虎[1] 裴继斌[1] 王赛[1] 张国梁[1] 

机构地区：[1]大连理工大学材料科学与工程学院三束材料改性国家重点实验室,大连116085

出　　处：《金属学报》2008年第3期292-296,共5页Acta Metallurgica Sinica

基　　金：大连市优秀青年科技人才基金2001-122~~

摘　　要：基于热加工过程金属学原理,建立了一类改进动态再结晶二维元胞自动机模型,模拟了加工硬化、动态回复、形核及再结晶晶粒长大等一系列过程利用该模型可得到整个热加工过程流变应力变化,晶粒的形态、晶粒取向及大小.流变应力的大小可由基体与再结晶晶粒位错密度的平均值计算.采用该模型对不同应变、应变率及温度下纯铜动态再结晶过程进行了模拟,模拟结果与相同热变形条件下纯铜实验结果吻合较好.Based on the metallurgical principles of hot working process, a two-dimensional cellular automata model for the dynamic recrystallization （DRX） was built up to simulate a series of processes such as the work hardening, dynamic recovery, nucleation and growth of recrystallization grains （R-grains）. By using the model, the variations of the flow stress, the morphology, orientation, and size of R-grains during the whole hot working process can be obtained. The flow stress can be calculated from the average dislocation densities in the matrix and the R-grains. The DRX processes of pure copper under different strains, strain rates, and temperatures were simulated, and the simulated results agree well with experimental results.

关 键 词：铜 动态再结晶 模拟 微观组织演化 

分 类 号：TG14[一般工业技术—材料科学与工程]