三元合金等温凝固过程的相场法模拟  

Simulation of isothermal solidification of ternary alloy with phase-field model

作　　者：王智平[1] 冯力[1] 路阳[1] 朱昌盛[1] 肖荣振[1] 

机构地区：[1]兰州理工大学材料科学与工程学院

出　　处：《兰州理工大学学报》2007年第4期1-4,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(3ZS061-A25-032)

摘　　要：采用相场与浓度场耦合的相场法,以Fe-C-P合金为例,模拟三元合金等温凝固的生长过程.结果表明,在一定的温度区间里,生长速度是随着温度的降低而减小的,随着温度的降低,二次枝晶生长越发达.模拟结果还表明,二次枝晶之间有大量的溶质富集;各向异性系数的改变会影响二次枝晶的形貌.The phase-field model in which the concentration-field and phase-field were coupled was applied to simulate microstructural evolution of isothermal dendritic growth of Fe-C-P ternary alloy. The calculation result indicated that, in a definite temperature range, the growth speed decreased with temperature reducing, and, instead, the growth of side-branches became flourishing. The result also indicated that, among the side-branches, the solute concentrated; the anisotropy coefficient could＇ have effect on the morphology of dendrite growth.

关 键 词：相场法 三元合金 等温凝固 模拟 

分 类 号：TG248[金属学及工艺—铸造] TG244