扩散界面场变量模型模拟晶粒长大过程  

SIMULATION OF GRAIN GROWTH PROCESS USING DIFFUSE INTERFACE FIELD VARIABLE MODEL

作　　者：陈大钦[1] 郑子樵[1] 刘祖耀[1] 李世晨[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《金属学报》2003年第12期1238-1242,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金59971066;教育部博士点基金2000053301

摘　　要：采用扩散界面场变量模型模拟二维晶粒长大的动力学过程,利用该模型可以避免常规方法中由于格点离散化带来的晶粒长大各向异性,并通过建立晶界能与梯度能量系数间的关系模拟得到了异常晶粒长大过程的微观组织演化图.模拟结果得出的晶粒形态、动力学和拓扑学结构特征等与已有的实验结果和理论分析一致.The kinetics of 2D-grain growth was simulated based on diffuse interface field variable model, in which the lattice anisotropy effect existing in the conventional models is almost no existance. Moreover, the microstructure evolution of abnormal grain growth can be obtained by establishing the relation between grain boundary energy and gradient energy coefficients. The simulated results, including grain morphologies, kinetics and topological structures etc, are good agreement with the reported experiments and theoretical analysis.

关 键 词：扩散界面场变量模型 晶粒长大 晶粒拓扑结构 计算机模拟 

分 类 号：TB115[理学—数学] O791[理学—应用数学]