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Evaluation of Microstructure and Mechanical Properties in 17-4PH Stainless Steels Fabricated by PBF and DED Processes

PBF와 DED 공정으로 제조된 17-4PH 스테인리스 강의 미세조직 및 기계적 특성 평가

  • Yoon, Jong-Cheon (Extreme fabrication technology R&D group, Korea Institute of Industrial Technology) ;
  • Lee, Min-Gyu (Extreme fabrication technology R&D group, Korea Institute of Industrial Technology) ;
  • Choi, Chang-Young (Extreme fabrication technology R&D group, Korea Institute of Industrial Technology) ;
  • Kim, Dong-Hyuk (Extreme fabrication technology R&D group, Korea Institute of Industrial Technology) ;
  • Jeong, Myeong-Sik (Extreme fabrication technology R&D group, Korea Institute of Industrial Technology) ;
  • Choi, Yong-Jin (Extreme fabrication technology R&D group, Korea Institute of Industrial Technology) ;
  • Kim, Da-Hye (Extreme fabrication technology R&D group, Korea Institute of Industrial Technology)
  • 윤종천 (한국생산기술연구원 극한가공기술그룹) ;
  • 이민규 (한국생산기술연구원 극한가공기술그룹) ;
  • 최창영 (한국생산기술연구원 극한가공기술그룹) ;
  • 김동혁 (한국생산기술연구원 극한가공기술그룹) ;
  • 정명식 (한국생산기술연구원 극한가공기술그룹) ;
  • 최용진 (한국생산기술연구원 극한가공기술그룹) ;
  • 김다혜 (한국생산기술연구원 극한가공기술그룹)
  • Received : 2018.03.13
  • Accepted : 2018.03.19
  • Published : 2018.04.30

Abstract

Additive manufacturing (AM) technologies have attracted wide attention as key technologies for the next industrial revolution. Among AM technologies using various materials, powder bed fusion (PBF) processes and direct energy deposition (DED) are representative of the metal 3-D printing process. Both of these processes have a common feature that the laser is used as a heat source to fabricate the 3-D shape through melting of the metal powder and solidification. However, the material properties of the deposited metals differ when produced by different process conditions and methods. 17-4 precipitation-hardening stainless steel (17-4PH SS) is widely used in the field of aircraft, chemical, and nuclear industries because of its good mechanical properties and excellent corrosion resistance. In this study, we investigated the differences in microstructure and mechanical properties of deposited 17-4PH SS by PBF and DED processes, including the heat treatment effect.

Keywords

References

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