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Solute trapping and non-equilibrium microstructure during rapid solidification of additive manufacturing

Author

Listed:
  • Neng Ren

    (Shanghai Jiao Tong University)

  • Jun Li

    (Shanghai Jiao Tong University)

  • Ruiyao Zhang

    (Centre of Excellence for Advanced Materials)

  • Chinnapat Panwisawas

    (Queen Mary University of London)

  • Mingxu Xia

    (Shanghai Jiao Tong University)

  • Hongbiao Dong

    (University of Leicester)

  • Jianguo Li

    (Shanghai Jiao Tong University)

Abstract

Solute transport during rapid and repeated thermal cycle in additive manufacturing (AM) leading to non-equilibrium, non-uniform microstructure remains to be studied. Here, a fully-coupled fluid dynamics and microstructure modelling is developed to rationalise the dynamic solute transport process and elemental segregation in AM, and to gain better understanding of non-equilibrium nature of intercellular solute segregation and cellular structures at sub-grain scale during the melting-solidification of the laser powder bed fusion process. It reveals the solute transport induced by melt convection dilutes the partitioned solute at the solidification front and promotes solute trapping, and elucidates the mechanisms of the subsequent microstructural morphology transitions to ultra-fine cells and then to coarse cells. These suggest solute trapping effect could be made used for reducing crack susceptibility by accelerating the solidification process. The rapid solidification characteristics exhibit promising potential of additive manufacturing for hard-to-print superalloys and aid in alloy design for better printability.

Suggested Citation

  • Neng Ren & Jun Li & Ruiyao Zhang & Chinnapat Panwisawas & Mingxu Xia & Hongbiao Dong & Jianguo Li, 2023. "Solute trapping and non-equilibrium microstructure during rapid solidification of additive manufacturing," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43563-x
    DOI: 10.1038/s41467-023-43563-x
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    References listed on IDEAS

    as
    1. Yuze Huang & Tristan G. Fleming & Samuel J. Clark & Sebastian Marussi & Kamel Fezzaa & Jeyan Thiyagalingam & Chu Lun Alex Leung & Peter D. Lee, 2022. "Keyhole fluctuation and pore formation mechanisms during laser powder bed fusion additive manufacturing," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    2. Chinnapat Panwisawas & Yuanbo T. Tang & Roger C. Reed, 2020. "Metal 3D printing as a disruptive technology for superalloys," Nature Communications, Nature, vol. 11(1), pages 1-4, December.
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