元胞自动机法在316LN不锈钢晶粒长大过程模拟中的应用  

Aplication of cellular automata in grain growth simulation of 316LN stainless steel

作　　者：季海鹏[1] 郭宝峰[1] 刘鑫刚[1] 张丽舸 金淼[1] 

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《燕山大学学报》2013年第5期389-395,共7页Journal of Yanshan University

基　　金：国家科技重大专项高档数控机床与基础制造装备专项(2012ZX04010081);河北省高等学校自然科学研究优秀青年基金项目(Y2012034)

摘　　要：结合晶粒长大过程中的物理基础,采用热激活、曲率驱动和能量耗散机制,引入能量降幅最大判据,建立了描述316LN不锈钢晶粒正常长大的元胞自动机模型,对316LN不锈钢晶粒长大过程进行模拟,模拟结果较准确地反映了晶粒正常长大规律。通过将模拟和试验的晶粒生长指数进行对比,表明在试验温度范围内,该模型可用于预测316LN不锈钢的晶粒尺寸。In combination with the physical basis in the process of grain growth, which are thermodynamics, curvature-driven and energy dissipation mechanism, a cellular automata model for normal grain growth of 316LN austenitic stainless steel is proposed using the criterion of the largest decline in energy. The results show that the Cellular Automata model can satisfactorily simulate the grain growth dynamics. The comparison of the simulated growth index with the experimental results, shows that the model works well in predicting the grain size involved in the process of grain growth of 316LN within the experimental temperature range.

关 键 词：晶粒长大 元胞自动机 计算机模拟 微观组织 

分 类 号：TG111[金属学及工艺—物理冶金] TP391[金属学及工艺—金属学]