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作者:

Zhou, Zhenlu (Zhou, Zhenlu.) | He, Dingyong (He, Dingyong.) | Tan, Zhen (Tan, Zhen.) | Wang, Yiming (Wang, Yiming.) | Shao, Wei (Shao, Wei.) | Guo, Xingye (Guo, Xingye.) | Zhou, Zheng (Zhou, Zheng.) | Wang, Benpeng (Wang, Benpeng.) | Yang, Ying (Yang, Ying.)

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EI Scopus SCIE

摘要:

W-based composites with the different immiscible second phases (Cu and Cu10Sn) were prepared by laser powder bed fusion (LPBF). The immiscible W phase and Cu/alpha-Cu phases were prone to separate during LPBF. The melted W phase could easily fuse together and form W matrix, and Cu or alpha-Cu phase distributed within the gaps among W phase. Cu or alpha-Cu phase can provide a gradient cooling way for the solidification of W phase through the transformation of 'solid-liquid-gas' during LPBF. The evaporation of Cu or Sn accelerated the heat dissipation, which caused the grain refinement of W. Higher thermal conductivity of Cu than alpha-Cu leads to the relative finer grain size of W phase in W-Cu composite. The heat conduction direction between W phase and Cu/alpha-Cu also affected the grain morphology. Heat continued transferred from W to Cu/alpha-Cu induced the columnar grain growth of W, the interlacing distribution of W and Cu/alpha-Cu made the growth of W columnar grains radiate out from the center Cu/alpha-Cu phase. Remarkable, cracks were severely restrained in W phase simultaneously although W phase melted completely. This is not only related to improvement of strength and ductility of W caused by grain refinement, but also because of the interlacing distribution of W and Cu/alpha-Cu phases, which could effectively reduce the stress degree in W phase during LBPF.(c) 2022 Elsevier B.V. All rights reserved.

关键词:

Laser powder bed fusion W matrix Grain refinement W -based composites Immiscible second phases

作者机构:

  • [ 1 ] [Zhou, Zhenlu]Beijing Univ Technol, Fac Mat & Mfg, Beijing, Peoples R China
  • [ 2 ] [He, Dingyong]Beijing Univ Technol, Fac Mat & Mfg, Beijing, Peoples R China
  • [ 3 ] [Tan, Zhen]Beijing Univ Technol, Fac Mat & Mfg, Beijing, Peoples R China
  • [ 4 ] [Wang, Yiming]Beijing Univ Technol, Fac Mat & Mfg, Beijing, Peoples R China
  • [ 5 ] [Shao, Wei]Beijing Univ Technol, Fac Mat & Mfg, Beijing, Peoples R China
  • [ 6 ] [Guo, Xingye]Beijing Univ Technol, Fac Mat & Mfg, Beijing, Peoples R China
  • [ 7 ] [Zhou, Zheng]Beijing Univ Technol, Fac Mat & Mfg, Beijing, Peoples R China
  • [ 8 ] [He, Dingyong]Beijing Engn Res Ctr Ecomat & LCA, Beijing 100124, Peoples R China
  • [ 9 ] [Wang, Benpeng]Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
  • [ 10 ] [Yang, Ying]Beijing Ctr Phys & Chem Anal, Beijing 100089, Peoples R China
  • [ 11 ] [Tan, Zhen]Beijing Univ Technol, Fac Mat & Mfg, 100 Ping Yuan, Beijing 100124, Peoples R China

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来源 :

JOURNAL OF ALLOYS AND COMPOUNDS

ISSN: 0925-8388

年份: 2022

卷: 926

6 . 2

JCR@2022

6 . 2 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:66

JCR分区:1

中科院分区:1

被引次数:

WoS核心集被引频次: 2

SCOPUS被引频次: 5

ESI高被引论文在榜: 0 展开所有

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