中国物理B ›› 2009, Vol. 18 ›› Issue (5): 1985-1990.doi: 10.1088/1674-1056/18/5/042

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Phase--field model of isothermal solidification withmultiple grains growth

冯力1, 朱昌盛1, 路阳1, 王智平2   

  1. (1)College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (2)College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;State Key Laboratory of Gansu Advanced Nonferrous Metal Material, Lanzhou University of Technology, Lanzhou 730050, China
  • 收稿日期:2008-10-08 修回日期:2008-11-06 出版日期:2009-05-20 发布日期:2009-05-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 50804019) and Foundation for Doctoral Program of the Ministry of Education of China (Grant No 20070731001).

Phase--field model of isothermal solidification with multiple grains growth

Feng Li(冯力)a)†, Wang Zhi-Ping(王智平)a)b), Zhu Chang-Sheng(朱昌盛)a), and Lu Yang(路阳)a)   

  1. a College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China; b State Key Laboratory of Gansu Advanced Nonferrous Metal Material, Lanzhou University of Technology, Lanzhou 730050, China
  • Received:2008-10-08 Revised:2008-11-06 Online:2009-05-20 Published:2009-05-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 50804019) and Foundation for Doctoral Program of the Ministry of Education of China (Grant No 20070731001).

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摘要： This paper develops a new phase--field model for equiaxed dendrite growth of multiple grains in multicomponent alloys based on the Ginzberg--Landau theory and phase--field model of a single grain. Taking Al--Cu and Al--Cu--Mg alloys for example, it couples the concentration field and simulates the dendrite growth process of multiple grains during isothermal solidification. The result of the simulation shows dendrite competitive growth of multiple grains, and is reapplied to the process of dendrite growth in practical solidification.

关键词: phase--field, multiple grains, multicomponent alloys, equiaxed dendrites

Abstract: This paper develops a new phase--field model for equiaxed dendrite growth of multiple grains in multicomponent alloys based on the Ginzberg--Landau theory and phase--field model of a single grain. Taking Al--Cu and Al--Cu--Mg alloys for example, it couples the concentration field and simulates the dendrite growth process of multiple grains during isothermal solidification. The result of the simulation shows dendrite competitive growth of multiple grains, and is reapplied to the process of dendrite growth in practical solidification.

Key words: phase--field, multiple grains, multicomponent alloys, equiaxed dendrites

中图分类号:  (Solidification)

  • 81.30.Fb
68.70.+w (Whiskers and dendrites (growth, structure, and nonelectronic properties))