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http://dx.doi.org/10.14775/ksmpe.2021.20.08.0042

Impact of Energy Density and Bead Overlap Ratio of a SUS316L Specimen Fabricated using Selective Laser Melting on Mechanical Characteristics  

Lee, Dong Wook (Smart Manufacturing Technology R&D Group, Korean Institute of Industrial Technology)
Kim, Woo Sung (Smart Manufacturing Technology R&D Group, Korean Institute of Industrial Technology)
Sung, Ji Hyun (Smart Manufacturing Technology R&D Group, Korean Institute of Industrial Technology)
Kim, Cheol (Department of Mechanical Engineering, Kyungpook University)
Lee, Ho Jin (Smart Manufacturing Technology R&D Group, Korean Institute of Industrial Technology)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.20, no.8, 2021 , pp. 42-51 More about this Journal
Abstract
Investigations of process parameters are essential when fabricating high-quality parts using additive manufacturing. This study investigates the change in the mechanical characteristics of a SUS316L specimen fabricated using selective laser melting based on the energy density and bead overlap ratio. The SUS316L powder particles were spherical and 35 ㎛ in size. Single-bead and hexahedral shape deposition experiments were performed sequentially. A single bead experiment was performed to obtain the bead overlap ratios for different laser parameters utilizing laser power and scan speed as experimental parameters. A hexahedral shape deposition experiment was also performed to observe the difference in mechanical properties, such as the internal porosity, surface roughness, and hardness, based on the energy density and bead overlap ratio of the three-dimensional printed part. Laser power, scan speed, overlap ratio, and layer thickness were chosen as parameters for the hexahedral shape deposition experiment. Accordingly, the energy density applied for three-dimensional printing, and the experimental parameters were calculated, and the energy density and bead overlap ratio for fabricating parts with good properties have been suggested.
Keywords
Selective Laser Melting; Additive Manufacturing; Process Parameter; Stainless Steel;
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Times Cited By KSCI : 1  (Citation Analysis)
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