六重对称合金枝晶生长场变量扩散元胞自动机模型
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汤思璠, 魏晶晶, 岳怡心, 李鹏宇, 姚曼, 王旭东
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Field-Variable Diffusion Cellular Automaton Model for Dendritic Growth with Sixfold Symmetry Alloys
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TANG Sifan, WEI Jingjing, YUE Yixin, LI Pengyu, YAO Man, WANG Xudong
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表1 计算采用的Mg-6%Al合金热物性参数[13]
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Table 1 Thermophysical properties of Mg-6%Al alloy used in the calculations[13]
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| Parameter | Value | Unit |
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| Diffusivity of alloy elements in liquid DL | 1.8 × 10-9 | m2·s-1 | | Diffusivity of alloy elements in solid DS | 1.0 × 10-13 | m2·s-1 | | Liquidus temperature TL | 901 | K | | Partition coefficient k | 0.4 | - | | Liquidus slope mL | -5.5 | K·%-1 (% for mass fraction) | | Gibbs-Thomson coefficient Γ | 2.0 × 10-7 | K·m | | Kinetic anisotropy δk | 0.5 | - | | Thermodynamic anisotropy δ | 0.03 | - | | Accommodation coefficient γ | 1.25 | - | | Degree of anisotropy n | 6 | - |
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