Modeling of Microstructure Evolution during Directional Solidification Process  

作　　者：李强 

机构地区：[1]School of Material Science and Engineering, Shengyang University of Technology, Shenyang 110023, China Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110016,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2005年第2期94-98,共5页武汉理工大学学报（材料科学英文版）

基　　金：Fundedbythe"863"ProgramofChina(No.2001AA339030)

摘　　要：A model was presented to describe the microstructure evolution during the directional solidification process. In this model, the problem of different properties in the solid and liquid phase was solved by making the properties continuous at the solid/liquid interface. Furthermore, a random noise was incorporated to reflect the anisotropic growth. Moreover, the averaging solute conservation was developed to keep the total solute conservation in the interface region. A simple ingot was simulated by this method, the model can represent the microstructure evolution, solute concentration redistribution, micro-segregation and the columnar-to-equiaxed transition.A model was presented to describe the microstructure evolution during the directional solidification process. In this model, the problem of different properties in the solid and liquid phase was solved by making the properties continuous at the solid/liquid interface. Furthermore, a random noise was incorporated to reflect the anisotropic growth. Moreover, the averaging solute conservation was developed to keep the total solute conservation in the interface region. A simple ingot was simulated by this method, the model can represent the microstructure evolution, solute concentration redistribution, micro-segregation and the columnar-to-equiaxed transition.

关 键 词：directional solidification microstructure evolution columnar-to-equiaxed transition MICRO-SEGREGATION 

分 类 号：TG111.4[金属学及工艺—物理冶金]