中国物理B ›› 2006, Vol. 15 ›› Issue (1): 219-223.doi: 10.1088/1009-1963/15/1/036
• 8000 CROSSDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
李梅娥1, 肖志英1, 杨根仓2, 周尧和2
Li Mei-E (李梅娥)a, Xiao Zhi-Ying (肖志英)a, Yang Gen-Cang (杨根仓)b, Zhou Yao-He (周尧和)b
摘要: The phase field method has been mainly used to simulate the growth of a single crystal in the past. But polycrystalline materials predominate in engineering. In this work, a phase field model for multigrain solidification is developed, which takes into account the random crystallographic orientations of crystallites and preserves the rotational invariance of the free energy. The morphological evolution of equiaxial multigrain solidification is predicted and the effect of composition on transformation kinetics is studied. The numerical results indicate that due to the soft impingement of grains the Avrami exponent varies with the initial melt composition and the solidification fraction.
中图分类号: (Solidification)