Laser & Optoelectronics Progress, Volume. 61, Issue 21, 2114006(2024)

Microstructure and Mechanical Properties of Laser-Directed Energy Deposition of 15-5PH Stainless Steel

Mengyuan Wu1...2, Jixin Yang2, Xiaoqi Hu2, Minghui Cai1, Xiaodong Nong2, Rui Wang2 and Yunjie Bi2,* |Show fewer author(s)
Author Affiliations
  • 1School of Materials Science and Engineering, Northeastern University, Shenyang 110819, Liaoning , China
  • 2Institute of Advanced Additive Manufacturing, Ji Hua Laboratory, Foshan 528200, Guangdong , China
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    This study reports the preparation of 15-5PH martensitic stainless steel via laser-directed energy deposition (L-DED) and systematically analyzes its microstructure and properties in different directions. The research results indicate that the microstructure of 15-5PH martensitic stainless steel fabricated via laser-directed energy deposition is primarily composed of martensitic and a minute amount of austenitic phases. The extremely rapid heating and cooling during the formation process result in columnar grains growing epitaxially along the deposition direction. The microstructures in different regions parallel to the scanning direction differ significantly, with the central region of the sample experiencing prolonged thermal accumulation, thus resulting in coarser microstructures compared with the microstructures in the top and bottom regions. The microstructural variations along different forming directions result in anisotropic mechanical properties, with tensile strengths of 1000 MPa and 1014 MPa, yield strengths of 756 MPa and 883 MPa, and elongations of 8.7% and 7.4%, along the deposition direction and the direction parallel to the scanning direction, respectively.

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    Mengyuan Wu, Jixin Yang, Xiaoqi Hu, Minghui Cai, Xiaodong Nong, Rui Wang, Yunjie Bi. Microstructure and Mechanical Properties of Laser-Directed Energy Deposition of 15-5PH Stainless Steel[J]. Laser & Optoelectronics Progress, 2024, 61(21): 2114006

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Jan. 25, 2024

    Accepted: Mar. 12, 2024

    Published Online: Nov. 15, 2024

    The Author Email: Bi Yunjie (biyunjie@jihualab.com)

    DOI:10.3788/LOP240605

    CSTR:32186.14.LOP240605

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