About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
Investigation of Mechanical Properties of Parts Fabricated with Gas- and Water-atomized 304L Stainless Steel Powder in the Laser Powder Bed Fusion Process |
Author(s) |
M. Hossein Sehhat, Austin T. Sutton, Ming C. Leu, Joseph W. Newkirk |
On-Site Speaker (Planned) |
M. Hossein Sehhat |
Abstract Scope |
The use of gas-atomized powder as the feedstock material for the Laser Powder Bed Fusion (L-PBF) process is common in the Additive Manufacturing (AM) community. Although gas-atomization produces powder with high sphericity, its expensive production cost has become a downside for its application in AM processes. Water-atomization may overcome this limitation due to its low-cost relative to the gas-atomization process. In this work, gas and water-atomized 304L stainless steel powders were morphologically characterized through scanning electron microscopy. The water-atomized powder had a wider particle size distribution and exhibited less sphericity. Measuring powder densities to obtain the Hausner ratio indicated that the water-atomized powder was less flowable than the gas-atomized powder. Through examining the mechanical part properties of L-PBF fabricated parts through tensile testing, gas-atomized powder shows higher tensile strength and elongation than those of water-atomized powder. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |