摘要
本文介绍了合金凝固传输过程中的二相流数学模型．该模型描述了固－液界面的传输现象和液相对流对宏观偏析的影响，并考虑了生核过程，热和溶质的过冷效应，及固相颗粒的宏观运动，从而把宏观传输过程和微观结构结合起来．采用该模型，对Ａｌ－４％Ｃｕ等轴晶合金的凝固进行了完整的数值模拟．
A two-phase model of the transport phenomena during solidification of alloys is presented that describes The effect of solid transport and liquid convection on macro-segregation and grain structure evolution.The model considers nucleation, thermal and solutal undercooling, and the macro-movement of solid grains, thus combining macro-transport phenomena with the microstructure of the solid.The two-phase model was used in a numerical simulation of solidification of Al-4%Cu equiaxed alloy and representative results are presented.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第9期B385-B392,共8页
Acta Metallurgica Sinica
关键词
合金
凝固
二相流
数值模拟
transport phenomenon, solidification, two-phase flow,numerical simulation,segregation, equiaxed crystal, Al-Cu alloy
