Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Impact of Energy Density and Bead Overlap Ratio of a SUS316L Specimen Fabricated using Selective Laser Melting on Mechanical Characteristics

선택적 레이저 용융 공정으로 제작된 시편의 SUS316L 에너지밀도 및 비드 중첩률에 따른 기계적 특성 변화 분석

  • 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)
  • 이동욱 (한국생산기술연구원 스마트제조기술연구그룹) ;
  • 김우성 (한국생산기술연구원 스마트제조기술연구그룹) ;
  • 성지현 (한국생산기술연구원 스마트제조기술연구그룹) ;
  • 김철 (경북대학교 기계공학부) ;
  • 이호진 (한국생산기술연구원 스마트제조기술연구그룹)
  • Received : 2021.04.23
  • Accepted : 2021.05.31
  • Published : 2021.08.31
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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

Acknowledgement

본 논문은 한국생산기술연구원 기관주요사업(KITECH EO-21-0009)과 2021년도 산업통상자원부 및 산업기술평가관리원 (과제번호:20009839) 의 연구비 지원으로 수행한 연구입니다.

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