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作者:

Wang, Junwei (Wang, Junwei.) | He, Dingyong (He, Dingyong.) | Wu, Xu (Wu, Xu.) | Shao, Wei (Shao, Wei.) | Guo, Xingye (Guo, Xingye.) | Zhou, Zheng (Zhou, Zheng.) | Tan, Zhen (Tan, Zhen.)

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EI Scopus SCIE

摘要:

The function-graded NiTi part is one of the greatest potential smart materials due to its superelasticity, shape memory, biocompatibility and the ability of coupling complex functionality. Laser powder bed fusion (LPBF) is a promising method for the preparation of microstructure-gradient NiTi parts. The microstructure of the NiTi alloy prepared by LPBF was tailored by switching the heat transfer modes through the variation of the process parameters. The LPBF-fabricated NiTi alloy with fine grains is obtained in the conduction mode because the laser energy is enough to melt the powder while, the growth of the grains is restricted without enough power. In comparison, the coarse grains penetrating through two or more layers is obtained in the keyhole mode, due to the appearance of the keyholes reheating the previous layers. This work proved the feasibility for the preparation of microstructure-gradient NiTi alloys by LPBF.

关键词:

NiTi Shape memory materials Laser powder bed fusion 3D printing Microstructure Heat transfer modes

作者机构:

  • [ 1 ] [Wang, Junwei]Beijing Univ Technol, Coll Mat Sci & Engn, Inst Welding & Surface Engn Technol, 100 Ping Le Yuan, Beijing 100124, Peoples R China
  • [ 2 ] [He, Dingyong]Beijing Univ Technol, Coll Mat Sci & Engn, Inst Welding & Surface Engn Technol, 100 Ping Le Yuan, Beijing 100124, Peoples R China
  • [ 3 ] [Wu, Xu]Beijing Univ Technol, Coll Mat Sci & Engn, Inst Welding & Surface Engn Technol, 100 Ping Le Yuan, Beijing 100124, Peoples R China
  • [ 4 ] [Shao, Wei]Beijing Univ Technol, Coll Mat Sci & Engn, Inst Welding & Surface Engn Technol, 100 Ping Le Yuan, Beijing 100124, Peoples R China
  • [ 5 ] [Guo, Xingye]Beijing Univ Technol, Coll Mat Sci & Engn, Inst Welding & Surface Engn Technol, 100 Ping Le Yuan, Beijing 100124, Peoples R China
  • [ 6 ] [Zhou, Zheng]Beijing Univ Technol, Coll Mat Sci & Engn, Inst Welding & Surface Engn Technol, 100 Ping Le Yuan, Beijing 100124, Peoples R China
  • [ 7 ] [Tan, Zhen]Beijing Univ Technol, Coll Mat Sci & Engn, Inst Welding & Surface Engn Technol, 100 Ping Le Yuan, Beijing 100124, Peoples R China
  • [ 8 ] [He, Dingyong]Beijing Engn Res Ctr Ecomat & LCA, Beijing 100124, Peoples R China

通讯作者信息:

  • [Wu, Xu]Beijing Univ Technol, Coll Mat Sci & Engn, Inst Welding & Surface Engn Technol, 100 Ping Le Yuan, Beijing 100124, Peoples R China;;

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来源 :

MATERIALS LETTERS

ISSN: 0167-577X

年份: 2024

卷: 362

3 . 0 0 0

JCR@2022

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