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http://dx.doi.org/10.4150/KPMI.2021.28.2.120

Manufacture of AlSi10Mg Alloy Powder for Powder Bed Fusion(PBF) Process using Gas Atomization Method  

Im, Weon Bin (Department of Chemical Engineering & Biotechnology, Korea Polytechnic University)
Park, Seung Joon (Department of Chemical Engineering & Biotechnology, Korea Polytechnic University)
Yun, Yeo Chun (MKT Co., LTD.)
Kim, Byeong Cheol (MKT Co., LTD.)
Publication Information
Journal of Powder Materials / v.28, no.2, 2021 , pp. 120-126 More about this Journal
Abstract
In this study, AlSi10Mg alloy powders are synthesized using gas atomization and sieving processes for powder bed fusion (PBF) additive manufacturing. The effect of nozzle diameter (ø = 4.0, 4.5, 5.0 and 8.0 mm) on the gas atomization and sieving size on the properties of the prepared powder are investigated. As the nozzle diameter decreases, the size of the manufactured powder decreases, and the uniformity of the particle size distribution improves. Therefore, the ø 4.0 mm nozzle diameter yields powder with superior properties. Spherically shaped powders can be prepared at a scale suitable for the PBF process with a particle size distribution of 10-45 ㎛. The Hausner ratio value of the powder is measured to be 1.24. In addition, the yield fraction of the powder prepared in this study is 26.6%, which is higher than the previously reported value of 10-15%. These results indicate that the nozzle diameter and the post-sieve process simultaneously influence the shape of the prepared powder as well as the satellite powder on its surface.
Keywords
Additive Manufacturing; Powder Bed Fusion; AlSi10Mg Powder; Gas Atomization; Sieving;
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