Modeling of Microstructure Evolution during Directional Solidification Process

• 作 者: 李强
• 机 构: School of Material Science and Engineering, Shengyang University of Technology, Shenyang 110023, Chi
• 出 处: Journal of Wuhan University of Technology-Materials Science
• 发表日期: 2005年02期
• 关键词: dimensions steps Thomson centration

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. 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.