Acta Metallurgica Sinica (English Letters) ›› 2009, Vol. 22 ›› Issue (3): 197-201.DOI: 10.1016/S1006-7191(08)60089-7

• Research paper • Previous Articles     Next Articles

Phase field modeling of dendrite growth

Yutuo ZHANG1,Chengzhi WANG1, Dianzhong LI2,Yiyi LI2   

  1. 1. Shenyang Ligong University, Shenyang 110168, China
    2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2008-10-17 Revised:2009-02-15 Online:2009-06-09 Published:2009-10-10
  • Contact: Yutuo ZHANG

Abstract:

Single dendrite and multi-dendrite growth for Al-2 mol pct Si alloy during isothermal solidification are simulated by phase field method. In the case of single equiaxed dendrite growth, the secondary and the necking phenomenon can be observed. For multi-dendrite growth, there exists the competitive growth among the dendrites during solidification. As solidification proceeds, growing and coarsening of the primary arms occurs, together with the branching and coarsening of the secondary arms. When the diffusion fields of dendrite tips come into contact with those of the branches growing from the neighboring dendrites, the dendrites stop growing and being to ripen and thicken.

Key words: Phase field modeling, Dendrite growth, Al-Si alloy, Isothermal solidification