| Al-Cu合金凝固微观组织的三维模拟及优化 |
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| 引用本文： | 卜晓兵,李落星,张立强,朱必武,王水平.Al-Cu合金凝固微观组织的三维模拟及优化[J].中国有色金属学报,2011(9). |
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| 作者姓名： | 卜晓兵 李落星 张立强 朱必武 王水平 |
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| 作者单位： | 湖南大学汽车车身先进设计与制造国家重点实验室;湖南大学材料科学与工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(51075132); 湖南省杰出青年基金资助项目(09JJ1007); 高等学院博士点专相科研基金资助项目(20090161110027); 湖南大学汽车车身先进设计制造国家重点实验室自主研究课题项目(60870005) |
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| 摘 要： | 采用CA-FE模型,对同一铸件不同尺寸的Al-2%Cu合金凝固微观组织进行三维模拟及预测,并引入空位形成能对固相扩散系数进行了优化。结果表明,当铸件直径分别为20、40和60 mm时,柱状晶占总晶体比率分别为65.2%、52.1%和21.4%,逐渐减少,而等轴晶所占比率逐渐增加;当换热系数由500 W/(m2.K)增大到5 000 W/(m2.K)时,同一铸件中不同直径的铸件凝固组织中柱状晶组织比例显著增大。模拟结果与实验结果吻合较好,能够较为准确地反映等轴晶和柱状晶的分布位置、比例和大小。
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| 关 键 词： | Al-Cu合金 3D元胞自动机 固相 扩散系数 凝固组织 |
Three-dimensional numerical simulation and optimization of solidification structure of Al-Cu alloy |
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| BU Xiao-bing,LI Luo-xing,ZHANG Li-qiang,ZHU Bi-wu,WANG Shui-ping.Three-dimensional numerical simulation and optimization of solidification structure of Al-Cu alloy[J].The Chinese Journal of Nonferrous Metals,2011(9). |
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| Authors: | BU Xiao-bing LI Luo-xing ZHANG Li-qiang ZHU Bi-wu WANG Shui-ping |
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| Affiliation: | BU Xiao-bing1,2,LI Luo-xing1,ZHANG Li-qiang2,ZHU Bi-wu2,WANG Shui-ping2 (1.State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,China,2.College of Materials Science and Engineering,China) |
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| Abstract: | A 3D cellular automaton-finite element(CA-FE) method was used to predict the solidification structure of Al-Cu alloy at different casting radii,and optimized the solution diffusion coefficient in solid phase.The results show that when the casting radius changes from 10 mm to 30 mm,the proportion of columnar grains changes from 65.2% to 21.4%.With increasing heat transfer coefficient from 500 W/(m2-K) to 5 000 W/(m2-K),the proportion of columnar grains also gradually increases.The simulated results are in ac... |
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| Keywords: | Al-Cu alloy 3D cellular automation method solid phase solution diffusion coefficient solidification structure |
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