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| 镍基合金焊缝凝固组织演变过程模拟和仿真 | |
| 引用本文： | 马瑞,董志波,魏艳红,占小红.镍基合金焊缝凝固组织演变过程模拟和仿真[J].焊接学报,2010,31(7):43-46. |
| 作者姓名： | 马瑞 董志波 魏艳红 占小红 |
| 作者单位： | 1. 哈尔滨工业大学,现代焊接生产技术国家重点实验室,哈尔滨,150001 2. 哈尔滨工业大学,现代焊接生产技术国家重点实验室,哈尔滨,150001;南京航空航天大学,材料科学与技术学院,南京,210016 3. 南京航空航天大学,材料科学与技术学院,南京,210016 |
| 摘 要： | 建立了一个元胞自动机与有限差分的耦合模型,并将其应用于镍基合金TIG焊熔池凝固过程的模拟.首先对焊接熔池内的各种凝固组织的生长进行了模拟,成功地模拟了平面晶、胞状晶、树枝晶、等轴晶的形态,并与试验结果进行了比照.进一步模拟熔池凝固时的凝固组织不同形态的演变过程,再现了胞状晶到树枝晶、树枝晶到等轴晶的转变过程.同时,采用溶质扩散模型模拟了扩散对溶质场分布的影响.结果表明,模拟结果与试验结果吻合良好. |
| 关 键 词： | 焊缝组织演变 元胞自动机法 溶质偏析 |
| 收稿时间： | 2009/2/26 0:00:00 |
Simulation of solidification microstructure evolution in molten pool of nickel base alloy |
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| MA Rui,DONG Zhibo,WEI Yanhong and ZHAN Xiaohong.Simulation of solidification microstructure evolution in molten pool of nickel base alloy[J].Transactions of The China Welding Institution,2010,31(7):43-46. | |
| Authors: | MA Rui DONG Zhibo WEI Yanhong and ZHAN Xiaohong |
| Affiliation: | State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China,State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China,State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China;School of Material Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China and School of Material Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China |
| Abstract: | A coupled model of cellular automaton and finite difference was established and applied to solidification process in molten pool of nickel base alloy.The growth of various solidification microstructures,including planar crystal,cellular crystal,columnar dendritic crystal and crystal equiaxed dendritic in molten pool was firstly carried out and contrasted with experiment results.Moreover,variation in solidification mode in molten pool was performed,which represented cellular-to-dendritic and columnar-to-equiaxed transitions.The effect of diffusion on the distribution of solute was also calculated by solute diffusion model.The simulation results were in good accordance with the experiment results. |
| Keywords: | microstructure evolution cellular automaton solute segregation |
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