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作者:

Wu, Xuping (Wu, Xuping.) | Zhang, Dongyun (Zhang, Dongyun.) (学者:张冬云) | Yi, Denghao (Yi, Denghao.) | Hu, Songtao (Hu, Songtao.) | Huang, Guoliang (Huang, Guoliang.) | Poprawe, Reinhart (Poprawe, Reinhart.) | Schleifenbaum, Johannes Henrich (Schleifenbaum, Johannes Henrich.)

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EI Scopus SCIE

摘要:

Laser powder bed fusion (LPBF) process is a promising additive manufacturing technique to manufacture multi-material integrated parts with complex structures. In this paper, the multi-material structure of Ti6Al4V/ AlSi10Mg is fabricated by LPBF, the interfacial characterization, interfacial reaction mechanism and mechanical properties of Ti/Al structure are investigated. Results show that continuous and excellent metallurgical bonding between Ti6Al4V and AlSi10Mg is obtained, and the width of interface zone is about 100 ??m. The equiaxed grains of aluminum alloy at the interface show random crystallographic orientation, which is attributed to the thermal dynamics in the melt pool, thermal cycles during LPBF process and lower thermal conductivity of ti-tanium alloy. The interfacial reaction layers are orderly from titanium alloy to the aluminum alloy consisting of Ti3Al, TiAl with nanoparticles Ti5Si3 and rod-like TiAl3. The segregated Si atoms react with the dissolution of Ti atoms in-situ to form Ti5Si3, meanwhile, a mass of Al atoms also react with Ti atoms to form TiAl. Namely, the TiAl phase forms in thin layer shape embedded with nanoparticles Ti5Si3 through eutectic reaction near the fusion line at the interface. At the wall of eutectic production, the TiAl3 phase nucleation and grow opposite to the heat dissipation direction and vertical to the fusion line. Outside the fusion line, the supersaturated solid ??-Ti transforms to Ti3Al through the diffusion of Al atoms in the part of titanium alloy. During the interfacial reaction, in-situ generated nanoparticles Ti5Si3 could improve the joint strength, and the tensile strength of Ti6Al4V/ AlSi10Mg specimens reached 264.8 ?? 22.4 MPa. The tensile specimens exhibit brittle fracture and two typical fracture morphologies appear on the fracture surface. Superscript/Subscript Available</comment

关键词:

Ti Interfacial characterization Mechanical properties Al multi-material structure Interfacial reaction mechanism LPBF

作者机构:

  • [ 1 ] [Wu, Xuping]Beijing Univ Technol, Inst Laser Engn, Fac Mat & Mfg, Pingleyuan 100, Beijing 100124, Peoples R China
  • [ 2 ] [Zhang, Dongyun]Beijing Univ Technol, Inst Laser Engn, Fac Mat & Mfg, Pingleyuan 100, Beijing 100124, Peoples R China
  • [ 3 ] [Yi, Denghao]Beijing Univ Technol, Inst Laser Engn, Fac Mat & Mfg, Pingleyuan 100, Beijing 100124, Peoples R China
  • [ 4 ] [Hu, Songtao]Beijing Univ Technol, Inst Laser Engn, Fac Mat & Mfg, Pingleyuan 100, Beijing 100124, Peoples R China
  • [ 5 ] [Huang, Guoliang]Beijing Univ Technol, Inst Laser Engn, Fac Mat & Mfg, Pingleyuan 100, Beijing 100124, Peoples R China
  • [ 6 ] [Wu, Xuping]Beijing Int Cooperat Base 3D Printing Digital Med, Beijing Engn Res Ctr 3D Printing Digital Med Hlth, Beijing, Peoples R China
  • [ 7 ] [Zhang, Dongyun]Beijing Int Cooperat Base 3D Printing Digital Med, Beijing Engn Res Ctr 3D Printing Digital Med Hlth, Beijing, Peoples R China
  • [ 8 ] [Yi, Denghao]Beijing Int Cooperat Base 3D Printing Digital Med, Beijing Engn Res Ctr 3D Printing Digital Med Hlth, Beijing, Peoples R China
  • [ 9 ] [Hu, Songtao]Beijing Int Cooperat Base 3D Printing Digital Med, Beijing Engn Res Ctr 3D Printing Digital Med Hlth, Beijing, Peoples R China
  • [ 10 ] [Huang, Guoliang]Beijing Int Cooperat Base 3D Printing Digital Med, Beijing Engn Res Ctr 3D Printing Digital Med Hlth, Beijing, Peoples R China
  • [ 11 ] [Poprawe, Reinhart]Fraunhofer Inst Laser Technol ILT, Aachen, Germany
  • [ 12 ] [Schleifenbaum, Johannes Henrich]Fraunhofer Inst Laser Technol ILT, Aachen, Germany
  • [ 13 ] [Schleifenbaum, Johannes Henrich]RWTH Aachen Univ Digital Addit Prod DAP, Aachen, Germany

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来源 :

MATERIALS CHARACTERIZATION

ISSN: 1044-5803

年份: 2022

卷: 192

4 . 7

JCR@2022

4 . 7 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: 25

SCOPUS被引频次: 31

ESI高被引论文在榜: 0 展开所有

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