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| 纯金属TIG焊熔池等轴晶生长的相场法模拟 | |
| 引用本文： | 魏艳红,王勇,董志波,马瑞,占小红. 纯金属TIG焊熔池等轴晶生长的相场法模拟[J]. 焊接学报, 2011, 32(3): 1-4,8 |
| 作者姓名： | 魏艳红 王勇 董志波 马瑞 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;南京航空航天大学,材料科学与技术学院,南京,210016 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 3. 南京航空航天大学,材料科学与技术学院,南京,210016 |
| 基金项目： | 国家自然科学基金资助项目 |
| 摘 要： | 焊接熔池冷却速度快、凝固时间短、过冷度大,结合以上特点构建相场法与有限筹分的耦合数学模型,对TIG焊接熔池中等轴晶生长过程进行研究.首先,利用该模型成功模拟了纯镍焊接熔池中心区域单个等轴晶生长过程形态演变.进一步研究了不同过冷条件下,等轴枝晶生长形貌和生长行为的变化规律.模拟结果符合固液界面形貌稳定性理论.同时,初步计... |
| 关 键 词： | 熔池凝固 相场法 微观组织 数值模拟 |
| 收稿时间： | 2010-08-02 |
Simulation of equiaxed dendritic growth in molten pool of pure metal with phase-field method |
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| WEI Yanhong,WANG Yong,DONG Zhibo,MA Rui and ZHAN Xiaohong. Simulation of equiaxed dendritic growth in molten pool of pure metal with phase-field method[J]. Transactions of The China Welding Institution, 2011, 32(3): 1-4,8 | |
| Authors: | WEI Yanhong WANG Yong DONG Zhibo MA Rui ZHAN Xiaohong |
| Affiliation: | WEI Yanhong1,2,WANG Yong1,DONG Zhibo1,MA Rui1,ZHAN Xiaohong2(1.State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin 150001,China,2.School of Material Science and Technology,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China). |
| Abstract: | A coupled model of phase field method and finite difference method was established to study equiaxed dendritic growth in the central area of TIG welded molten pool.In this model,some characteristics of welding pool,such as high cooling rate,short solidification time,and large undercooling degree were taken into consideration.Based on the model,simulation of single equiaxed grain growth in the molten pool of pure nickel was performed successfully.Moreover,the change of dendrite morphology and growth behavior... |
| Keywords: | solidification of weld molten pool phase-field method microstructure numerical simulation |
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