中国物理B ›› 2020, Vol. 29 ›› Issue (12): 128201-.doi: 10.1088/1674-1056/abad1f

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  • 收稿日期:2020-05-21 修回日期:2020-07-01 接受日期:2020-08-07 出版日期:2020-12-01 发布日期:2020-11-26

Effect of grain boundary energy anisotropy on grain growth in ZK60 alloy using a 3D phase-field modeling

Yu-Hao Song(宋宇豪)1, Ming-Tao Wang(王明涛)1,2,3,†, Jia Ni(倪佳)1, Jian-Feng Jin(金剑锋)1,2, and Ya-Ping Zong(宗亚平)1   

  1. 1 School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; 2 State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China; 3 Research Centre for Metallic Wires, Northeastern University, Shenyang 110819, China
  • Received:2020-05-21 Revised:2020-07-01 Accepted:2020-08-07 Online:2020-12-01 Published:2020-11-26
  • Contact: Corresponding author. E-mail: wangmingtao@mail.neu.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFB0701204), the 111 Project, China (Grant No. B20029), the Fundamental Research Funds for the Central Universities, China (Grant Nos. N2002017 and N2007011), the National Natural Science Foundation of China (Grant No. 51571055), and the Science Fund from the Science and Technology Bureau of Jiangyin High-Tech Industrial Development Zone, China (Grant No. ZX20200062).

Abstract: A three-dimensional (3D) multiple phase field model, which takes into account the grain boundary (GB) energy anisotropy caused by texture, is established based on real grain orientations and Read-Shockley model. The model is applied to the grain growth process of polycrystalline Mg (ZK60) alloy to investigate the evolution characteristics in different systems with varying proportions of low-angle grain boundary (LAGB) caused by different texture levels. It is found that the GB energy anisotropy can cause the grain growth kinetics to change, namely, higher texture levels (also means higher LAGB proportion) result in lower kinetics, and vice versa. The simulation results also show that the topological characteristics, such as LAGB proportion and distribution of grain size, undergo different evolution characteristics in different systems, and a more serious grain size fluctuation can be caused by a higher texture level. The mechanism is mainly the slower evolution of textured grains in their accumulation area and the faster coarsening rate of non-textured grains. Therefore, weakening the texture level is an effective way for implementing a desired homogenized microstructure in ZK60 Mg alloy. The rules revealed by the simulation results should be of great significance for revealing how the GB anisotropy affects the evolution of polycrystalline during the grain growth after recrystallization and offer the ideas for processing the alloy and optimizing the microstructure.

Key words: phase-field model, grain boundary (GB) energy anisotropy, grain size fluctuation, ZK60 alloy

中图分类号:  (Computational modeling; simulation)

  • 82.20.Wt
81.10.-h (Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation) 91.60.Ed (Crystal structure and defects, microstructure) 68.55.jm (Texture)