Forthcoming Articles

International Journal of Manufacturing Research

International Journal of Manufacturing Research (IJMR)

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International Journal of Manufacturing Research (One paper in press)

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  • Simulation and Analysis of Pore Evolution in 316L Stainless Steel Formed by PBF.LB with Laser Remelting Post-treatment   Order a copy of this article
    by Zhiwen Li, Yonghong Zhu, Xin Chen, Yanping Miao, Jieyong Deng, Wei Wei 
    Abstract: In the process of laser based powder bed fusion (PBF.LB), pore defects can seriously affect the quality of formed parts. In this paper, the effectiveness of laser remelting to eliminate the pore defects of PBF.LB formed parts were analyzed experimentally. It was found that the porosity of PBF.LB formed parts decreased from 2.15% to 0.65% after laser remelting. Based on the level set method, a numerical simulation of a multi-physics field finite element model was established to conduct a detailed analysis of the mechanism of pore evolution during laser remelting. It is found that the pore evolution is significantly affected by the Marangoni effect at the micro scale. Affected by the Marangoni effect, the porosity does not rise vertically during the evolution process, but moves to the tail area of the molten pool during the rising process. The essence of pore evolution is fluid mass transfer.
    Keywords: Additive manufacturing;PBF.LB;Pore evolution;316L stainless steel?Laser remelting?Marangoni effect.
    DOI: 10.1504/IJMR.2025.10074730
     

 

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