Phase field modeling of dendrite growth
来源期刊：Acta Metallurgica Sinica2009年第3期
论文作者：Chengzhi WANG Yiyi LI Yutuo ZHANG Dianzhong LI
Key words：Phase field modeling; Dendrite growth; AI-Si alloy; Isothermal solidification;
Abstract: Single dendrite and multi-dendrite growth for A1-2 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 dur-ing 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.
Chengzhi WANG1，Yiyi LI2，Yutuo ZHANG1，Dianzhong LI2
(1.Shenyang Ligong University,Shenyang 110168,China;
2.Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)
Abstract:Single dendrite and multi-dendrite growth for A1-2 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 dur-ing 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; AI-Si alloy; Isothermal solidification;
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