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Effects of supercooling on dendritic sidebranching during solidification of pure Ni melt

TIAN Wei-xing1, LIU Jian2, SU Yu-kuo3, LI Xing-wen3, TIAN Xue-lei1   

  1. 1. Key Laboratory of Liquid Structure and Heredity of Materials,Ministry of Education,School of material Science and engineering,Shandong University,Jinan 250061,China;2. Engineering Training Center,Shandong University,Jinan 250061,China
  • Received:2006-10-11 Revised:1900-01-01 Online:2007-02-24 Published:2007-02-24
  • Contact: TIAN Wei-xing

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Abstract: Sidebranching of dendrites during solidification of pure Ni melt was studied via simulation by using a modified phasefield model which incorporates both structural fluctuation and energetic fluctuation. The results indicate that with increasing undercooling, side branching intensifies and neck shrinkage can be found in the trunk. The trunk will probably rupture when convection happens, and will result in spontaneous grain refinement in deeply undercooled melts.

Key words: dendrite, phase field method , fluctuations

CLC Number: 

  • TG111.4
[1] LIU Jian,SU Yu-kuo,XUN Guang-an . Effects of phase-field parameters on dendritic morphology using phase field simulation [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2007, 37(3): 74-77 .
[2] TIAN Weixing,SUN Jianjun,ZHENG Hongliang,ZHAN Chengwei,TIAN Xuelei . [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2006, 36(5): 5-08 .
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