Investigation of Mechanical Properties of Parts Fabricated with Gas- and Water-Atomized 304L Stainless Steel Powder in the Laser Powder Bed Fusion Process

M. Hossein Sehhat, Austin T. Sutton, Chia Hung Hung, Joseph W. Newkirk, Ming C. Leu

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)

摘要

The use of gas-atomized powder as the feedstock material for the laser powder bed fusion (LPBF) process is common in the additive manufacturing (AM) community. Although gas-atomization produces powder with high sphericity, its relatively expensive production cost is a downside for application in AM processes. Water atomization of powder 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 (SEM). The water-atomized powder had a wider particle size distribution and exhibited less sphericity. Measuring powder flowability using the Revolution Powder Analyzer (RPA) indicated that the water-atomized powder had less flowability than the gas-atomized powder. Through examining the mechanical properties of LPBF fabricated parts using tensile tests, the gas-atomized powder had significantly higher yield tensile strength and elongation than the water-atomized powder; however, their ultimate tensile strengths were not significantly different.

原文English
頁(從 - 到)1088-1095
頁數8
期刊JOM
74
發行號3
DOIs
出版狀態Published - 2022 3月

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 工程 (全部)

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