中国物理B ›› 2017, Vol. 26 ›› Issue (8): 80504-080504.doi: 10.1088/1674-1056/26/8/080504

• GENERAL • 上一篇    下一篇

Multi-phase field simulation of grain growth in multiple phase transformations of a binary alloy

Li Feng(冯力), Beibei Jia(贾北北), Changsheng Zhu(朱昶胜), Guosheng An(安国升), Rongzhen Xiao(肖荣振), Xiaojing Feng(冯小静)   

  1. 1 College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
    2 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou 730050, China
  • 收稿日期:2017-03-05 修回日期:2017-04-27 出版日期:2017-08-05 发布日期:2017-08-05
  • 通讯作者: Li Feng E-mail:fenglils@lut.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51661020, 11504149, and 11364024).

Multi-phase field simulation of grain growth in multiple phase transformations of a binary alloy

Li Feng(冯力)1,2, Beibei Jia(贾北北)1, Changsheng Zhu(朱昶胜)2, Guosheng An(安国升)1,2, Rongzhen Xiao(肖荣振)1,2, Xiaojing Feng(冯小静)1   

  1. 1 College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
    2 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou 730050, China
  • Received:2017-03-05 Revised:2017-04-27 Online:2017-08-05 Published:2017-08-05
  • Contact: Li Feng E-mail:fenglils@lut.cn
  • About author:0.1088/1674-1056/26/8/
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51661020, 11504149, and 11364024).

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摘要：

This work establishes a temperature-controlled sequence function, and a new multi-phase-field model, for liquid-solid-solid multi-phase transformation by coupling the liquid-solid phase transformation model with the solid-solid phase transformation model. Taking an Fe-C alloy as an example, the continuous evolution of a multi-phase transformation is simulated by using this new model. In addition, the growth of grains affected by the grain orientation of the parent phase (generated in liquid-solid phase transformation) in the solid-solid phase transformation is studied. The results show that the morphology of ferrite grains which nucleate at the boundaries of the austenite grains is influenced by the orientation of the parent austenite grains. The growth rate of ferrite grains which nucleate at small-angle austenite grain boundaries is faster than those that nucleate at large-angle austenite grain boundaries. The difference of the growth rate of ferrites grains in different parent phase that nucleate at large-angle austenite grain boundaries, on both sides of the boundaries, is greater than that of ferrites nucleating at small-angle austenite grain boundaries.

关键词: multi-phase transformation, microstructure, multi-phase-field method, grain orientation

Abstract:

This work establishes a temperature-controlled sequence function, and a new multi-phase-field model, for liquid-solid-solid multi-phase transformation by coupling the liquid-solid phase transformation model with the solid-solid phase transformation model. Taking an Fe-C alloy as an example, the continuous evolution of a multi-phase transformation is simulated by using this new model. In addition, the growth of grains affected by the grain orientation of the parent phase (generated in liquid-solid phase transformation) in the solid-solid phase transformation is studied. The results show that the morphology of ferrite grains which nucleate at the boundaries of the austenite grains is influenced by the orientation of the parent austenite grains. The growth rate of ferrite grains which nucleate at small-angle austenite grain boundaries is faster than those that nucleate at large-angle austenite grain boundaries. The difference of the growth rate of ferrites grains in different parent phase that nucleate at large-angle austenite grain boundaries, on both sides of the boundaries, is greater than that of ferrites nucleating at small-angle austenite grain boundaries.

Key words: multi-phase transformation, microstructure, multi-phase-field method, grain orientation

中图分类号:  (Numerical simulations of chaotic systems)

  • 05.45.Pq
05.70.Fh (Phase transitions: general studies) 61.66.Dk (Alloys ) 64.75.Gh (Phase separation and segregation in model systems (hard spheres, Lennard-Jones, etc.))