Article Effect of mushy zone constant in Voller-Prakash model on keyholing behaviour in laser powder bed fusion simulation

Jun Katagiri ORCID (National Institute for Materials Science) ; Sukeharu Nomoto SAMURAI ORCID (National Institute for Materials Science) ; Masahiro Kusano SAMURAI ORCID (National Institute for Materials Science) ; Makoto Watanabe SAMURAI ORCID (National Institute for Materials Science)

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Jun Katagiri, Sukeharu Nomoto, Masahiro Kusano, Makoto Watanabe. Effect of mushy zone constant in Voller-Prakash model on keyholing behaviour in laser powder bed fusion simulation. Results in Engineering. 2024, 24 (), 103567. https://doi.org/10.1016/j.rineng.2024.103567
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(abstract)

This paper is a study of the model constant of the Voller-Prakash model: the mushy zone constant (C), which determines the flow resistance in the mushy zone during metal solidification. A drag force-liquid fraction relation was derived, assuming that the dynamic and static pressures were equal. The C values for the three morphologies were estimated by analytically calculating the morphological parameters of the Kozeny-Carman equation, which was the basis of the Voller-Prakash model.

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Keyword: Laser powder bed fusion, Mushy zone flow resistance, Voller-Prakash model, Multiphysics CFD simulation, Keyhole pore formation

Date published: 2024-12-02

Publisher: Elsevier BV

Journal:

  • Results in Engineering (ISSN: 25901230) vol. 24 103567

Funding:

  • 防衛装備庁 JPJ004596 (安全保障技術研究推進制度)

Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1016/j.rineng.2024.103567

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Updated at: 2024-12-10 16:56:53 +0900

Published on MDR: 2024-12-11 08:30:29 +0900

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