中国物理B ›› 2025, Vol. 34 ›› Issue (8): 88103-088103.doi: 10.1088/1674-1056/add501

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Phase-field modeling of effect of Ni on formation and phase transformation of Cu-rich phase in Fe-Cu-Ni alloys

Ming-Guang Wei(位明光)1, Zhong-Wen Zhang(张中文)1, Min Cui(崔敏)2, Yuan-Bin Zhang(张元彬)2, and Tong-Guang Zhai(翟同广)2,†   

  1. 1 School of Physics Science and Technology, Guangxi University, Nanning 530004, China;
    2 School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, China
  • 收稿日期:2025-03-04 修回日期:2025-04-28 接受日期:2025-05-07 出版日期:2025-07-17 发布日期:2025-08-18
  • 通讯作者: Tong-Guang Zhai E-mail:tongguang_zhai@yahoo.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51871086).

Phase-field modeling of effect of Ni on formation and phase transformation of Cu-rich phase in Fe-Cu-Ni alloys

Ming-Guang Wei(位明光)1, Zhong-Wen Zhang(张中文)1, Min Cui(崔敏)2, Yuan-Bin Zhang(张元彬)2, and Tong-Guang Zhai(翟同广)2,†   

  1. 1 School of Physics Science and Technology, Guangxi University, Nanning 530004, China;
    2 School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, China
  • Received:2025-03-04 Revised:2025-04-28 Accepted:2025-05-07 Online:2025-07-17 Published:2025-08-18
  • Contact: Tong-Guang Zhai E-mail:tongguang_zhai@yahoo.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51871086).

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摘要： A phase-field model integrated with the thermodynamic databases was constructed to investigate the impact of Ni content on the precipitation kinetics and phase transformation of the Cu-rich phase in Fe-Cu-Ni alloy at 773 K. The results demonstrated that the Cu core-Ni shell structures form via the decomposition of Cu-Ni co-clusters, which is consistent with previous experimental results. As the Ni content increases, both the volume fraction and number density of Cu-rich precipitates increase, while their size decreases. With the increase in Ni content, the transformation from $\alpha $ Cu to 9R Cu is accelerated, which is the opposite to the result of increasing Mn content. Magnetic energy can increase the nucleation rate of the Cu-rich phase, but it does not affect the phase transformation driving force required for its crystal structure transformation.

关键词: phase-field method, Cu-rich phase, phase transformation, magnetic energy

Abstract: A phase-field model integrated with the thermodynamic databases was constructed to investigate the impact of Ni content on the precipitation kinetics and phase transformation of the Cu-rich phase in Fe-Cu-Ni alloy at 773 K. The results demonstrated that the Cu core-Ni shell structures form via the decomposition of Cu-Ni co-clusters, which is consistent with previous experimental results. As the Ni content increases, both the volume fraction and number density of Cu-rich precipitates increase, while their size decreases. With the increase in Ni content, the transformation from $\alpha $ Cu to 9R Cu is accelerated, which is the opposite to the result of increasing Mn content. Magnetic energy can increase the nucleation rate of the Cu-rich phase, but it does not affect the phase transformation driving force required for its crystal structure transformation.

Key words: phase-field method, Cu-rich phase, phase transformation, magnetic energy

中图分类号:  (Growth from solid phases (including multiphase diffusion and recrystallization))

  • 81.10.Jt
61.50.Ah (Theory of crystal structure, crystal symmetry; calculations and modeling) 64.70.kd (Metals and alloys)