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

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

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<p>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.</p>

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