Materials Transactions Online

Materials Transactions, Vol.58 No.02 (2017) pp.294-297
© 2016 The Japan Institute of Metals and Materials

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

Joon-Phil Choi1, Gi-Hun Shin2, 3, Hak-Sung Lee4, 5, Dong-Yeol Yang2, 5, Sangsun Yang2, Chang-Woo Lee5, Mathieu Brochu1 and Ji-Hun Yu2, 5

1Department of Mining and Materials Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
2Powder Technology Department, Korea Institute of Materials Science (KIMS), Changwon 51508, Republic of Korea
3Department of Materials Science and Engineering, University of Ulsan, Ulsan 44610, Republic of Korea
4Materials Modeling and Characterization Department, Korea Institute of Materials Science (KIMS), Changwon 51508, Republic of Korea
5Metal 3D Printing Convergence Research Team, Korea Institute of Machinery & Materials (KIMM), Daejeon 34103, Republic of Korea

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.

[doi:10.2320/matertrans.M2016364]

(Received 2016/10/18; Accepted 2016/11/15; Published 2017/01/25)

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

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