| 一种改进的模拟凝固微观组织的宏微观耦合模型 |
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| 引用本文： | 郭洪民,危仁杰,杨湘杰. 一种改进的模拟凝固微观组织的宏微观耦合模型[J]. 特种铸造及有色合金, 2003, 0(5): 26-28 |
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| 作者姓名： | 郭洪民 危仁杰 杨湘杰 |
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| 作者单位： | [1]南昌大学机电工程学院，南昌330029 [2]南昌大学，南昌330029 |
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| 基金项目： | 教育部骨干教师资助计划 [2 0 0 0 - 75]，江西省自然科学基金资助项目 (0 0 50 0 34) |
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| 摘 要： | 按照复杂性研究思想，将元胞自动机理论和金属凝固理论相结合，建立了模拟凝固微观组织演变的宏微观耦合模型Micros CA-Solidification。与原有元胞自动机模型相比，该模型考虑了溶质再分配和液相中溶质扩散机制，考虑了成分过冷、曲率过冷及界面各向异性对枝晶尖端局部过冷度和界面平衡温度的影响，可较细致地模拟晶粒的结构和形态转变。
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| 关 键 词： | 微观组织 数值模拟 元胞自动机模型 宏微观耦合模型 金属凝固理论 |
| 文章编号： | 1001-2449(2003)05-0026-03 |
| 修稿时间： | 2003-03-25 |
A Modeling of Solidification Microstructure of Aluminum Alloy |
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| Guo Hongmin Wei Renjie Yang Xiangjie. A Modeling of Solidification Microstructure of Aluminum Alloy[J]. Special Casting & Nonferrous Alloys, 2003, 0(5): 26-28 |
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| Authors: | Guo Hongmin Wei Renjie Yang Xiangjie |
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| Abstract: | Although in past decades, solidification microstructure simulation of alloys has been greatly improved due to the development of computer technology and accurate modeling method, the space scale characteristics of the microstructure has limited the applicable range of various modeling method. The classical CA(cellar automation) model was modified by coupling CA theories with metal solidification theories. Compared to the classical CA model, the modified model can more accurately simulate the microstructure and morphology transformation of the grains taking account into the effects of solute redistribution and diffusion in the melt,interface anisotropy and unstituent and curvature undercoolings on the local undercooling of dendritic tip and interface equilibrium temperature. |
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| Keywords: | Microstructure Modeling Cellar Automation Model Macro-Micro-Coupled Model |
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