| 采用CA-FE法模拟双辊连铸纯铝凝固微观组织 |
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| 引用本文： | 陈守东,陈敬超. 采用CA-FE法模拟双辊连铸纯铝凝固微观组织[J]. 特种铸造及有色合金, 2011, 31(12): 1107-1111 |
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| 作者姓名： | 陈守东 陈敬超 |
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| 作者单位： | 昆明理工大学稀贵及有色金属先进材料教育部重点实验室,云南省新材料制备与加工重点实验室 |
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| 基金项目： | 新国家自然科学联合基金资助项目(u0837601); 新国家基金资助项目(50874054); 云南省创新团队资助项目(2009CI003); 云南省自然科学基金资助项目(2008CD087) |
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| 摘 要： | 使用有限元软件Procast中的元胞自动机-有限元模型,建立了一个模拟双辊连续铸轧纯铝凝固微观组织形成的随机性模型.综合考虑了溶质再分配、界面曲率、晶粒择优生长的作用,基于有限元建立了宏观温度场计算和一个改进的元胞自动机模型.采用基于高斯分布的连续性形核模型,辊面和熔体内部的形核分别采用两种形核分布函数；枝晶尖端生长速度采用与局部过冷度有关的修正KGT模型.利用软件计算结果模拟了不同浇注温度和熔液内部平均形核过冷度对凝固微观组织形成的影响.
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| 关 键 词： | 双辊连续铸轧 凝固组织 元胞自动机 数值模型 工艺参数 |
Microstructure Simulation of Twin-Roll Continuous Casting Pure Aluminum by Using Cellular Automaton-Finite Element Method |
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| Chen Shoudong , Chen Jingchao. Microstructure Simulation of Twin-Roll Continuous Casting Pure Aluminum by Using Cellular Automaton-Finite Element Method[J]. Special Casting & Nonferrous Alloys, 2011, 31(12): 1107-1111 |
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| Authors: | Chen Shoudong Chen Jingchao |
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| Affiliation: | Chen Shoudong,Chen Jingchao(Key Laboratory of Advance Material of Rare Precious and Nonferrous Metals,Education Ministry of China,and Key Laboratory of Advanced Materials of Yunnan Province,Kunming University of Science and Technology) |
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| Abstract: | A stochastic model for simulating the microstructure formation of twin-roll continuous casting pure aluminum during solidification process has been established based on a 3-D cellular automaton(CA)-finite element(FE)model in Procast package.Based on the finite element method(FEM),macroscopic model of heat transfer calculation and a modified Cellular Automaton were established,in which the effects of solute redistribution,interface curvature,and preferred orientation were considered.Different Gaussian distri... |
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| Keywords: | Twin-Roll Continuous Casting Solidification Structure Cellular Automaton Numerical Simulation Processing Parameters |
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