| Anisotropic growth of multigrain in equiaxial solidification simulated with the phase field method |
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| 作者姓名： | 李梅娥 肖志英 杨根仓 周尧和 |
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| 作者单位： | School of Material Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China;School of Material Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China;State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China;State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant Nos 50395103 and 50271057). |
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| 摘 要： |
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| 关 键 词： | 各向异性生长 多晶粒 等轴凝固模拟 相位场法 晶体学 |
| 收稿时间： | 2005-04-13 |
| 修稿时间： | 2005-04-132005-05-24 |
Anisotropic growth of multigrain in equiaxial solidification simulated with the phase field method |
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| Li Mei-E,Xiao Zhi-Ying,Yang Gen-Cang and Zhou Yao-He.Anisotropic growth of multigrain in equiaxial solidification simulated with the phase field method[J].Chinese Physics B,2006,15(1):219-223. |
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| Authors: | Li Mei-E Xiao Zhi-Ying Yang Gen-Cang and Zhou Yao-He |
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| Abstract: | 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. |
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| Keywords: | multigrain solidification transformation kinetics phase field method |
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