Evaluation of Powder Layer Density for the Selective Laser Melting (SLM) Process

Joon-Phil Choi; Gi-Hun Shin; Hak-Sung Lee; Dong-Yeol Yang; Sangsun Yang; Chang-Woo Lee; Mathieu Brochu; Ji-Hun Yu

doi:10.2320/matertrans.M2016364

Joon-Phil Choi, Gi-Hun Shin, Hak-Sung Lee, Dong-Yeol Yang, Sangsun Yang, Chang-Woo Lee, Mathieu Brochu, Ji-Hun Yu

Author information

Joon-Phil Choi
Department of Mining and Materials Engineering, McGill University
Gi-Hun Shin
Powder Technology Department, Korea Institute of Materials Science (KIMS)
Department of Materials Science and Engineering, University of Ulsan
Hak-Sung Lee
Materials Modeling and Characterization Department, Korea Institute of Materials Science (KIMS)
Metal 3D Printing Convergence Research Team, Korea Institute of Machinery & Materials (KIMM)
Dong-Yeol Yang
Powder Technology Department, Korea Institute of Materials Science (KIMS)
Metal 3D Printing Convergence Research Team, Korea Institute of Machinery & Materials (KIMM)
Sangsun Yang
Powder Technology Department, Korea Institute of Materials Science (KIMS)
Chang-Woo Lee
Metal 3D Printing Convergence Research Team, Korea Institute of Machinery & Materials (KIMM)
Mathieu Brochu
Department of Mining and Materials Engineering, McGill University
Ji-Hun Yu
Powder Technology Department, Korea Institute of Materials Science (KIMS)
Metal 3D Printing Convergence Research Team, Korea Institute of Machinery & Materials (KIMM)

Keywords: selective laser melting, powder layer density, flowability, 316L stainless steel powder

JOURNAL FREE ACCESS FULL-TEXT HTML

2017 Volume 58 Issue 2 Pages 294-297

DOI https://doi.org/10.2320/matertrans.M2016364

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Abstract

In selective laser melting (SLM), powder properties like size, distribution, shape, flow, and packing have effects on the process and the final parts quality, and several standards and methods are available for representing these characteristics. However, these are not enough to explain the actual packing state of the particles across the powder bed substrate. This work reports a novel method for evaluation of the powder layer density in the SLM process. The results show that the powder characteristics measured by conventional methods are not always appropriate for determining whether a powder material is suitable for SLM.

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