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作者:

Cui, Li (Cui, Li.) | Wu, Defan (Wu, Defan.) | Chang, Yaoqing (Chang, Yaoqing.) | Guo, Xingye (Guo, Xingye.) | Wu, Xu (Wu, Xu.) | Shao, Wei (Shao, Wei.) | He, Dingyong (He, Dingyong.) (学者:贺定勇)

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EI Scopus SCIE

摘要:

Friction stir welding (FSW) was introduced to join laser powder bed fusion (LPBF) AlSi10Mg alloys in this study. Microstructure and texture evolution, microhardness distribution and tensile properties of the FSW joints were investigated. The evolution of grain size, grain boundary and misorientation angles distribution, dynamic recrystallization and crystallographic texture in various regions of the FSW joint concerning base metal (BM), thermo-mechanically affected zone (TMAZ), upper part of nugget zone (UPNZ) and low part of nugget zone (LPNZ) was characterized by using electron back-scattered diffraction (EBSD). The analysis reveals a strong texture evolution of shear components on the TMAZ, UPNZ and LPNZ as well as a fully recrystallized grain structure on the UPNZ and LPNZ. Additionally, a gradual evolution in Si-rich eutectic from continuous cellular networks in the BM to totally globularized particles in the UPNZ and LPNZ occurs in the FSW joint. The microhardness rapidly decreases to the TMAZ from the BM through heat affected zone (HAZ) reaching the lowest value of -65.0 HV at the TMAZ/NZ boundary. The FSW joint in LPBF AlSi10Mg alloys exhibits an ultimate tensile strength (UTS) of 247 MPa and an elongation-to-failure (EI) of 8.8%. The UTS of FSW joints is reduced compared to the BM, but the EI has been increased by 160%, implying an improvement in tensile ductility.

关键词:

Mechanical properties Laser powder bed fusion Microstructure and texture AlSi10Mg alloys Friction stir welding

作者机构:

  • [ 1 ] [Cui, Li]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 2 ] [Wu, Defan]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 3 ] [Guo, Xingye]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 4 ] [Wu, Xu]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 5 ] [Shao, Wei]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 6 ] [He, Dingyong]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 7 ] [Chang, Yaoqing]Tianjin Long March Launch Vehicle Mfg Co Ltd, Tianjin 300462, Peoples R China

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来源 :

CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY

ISSN: 1755-5817

年份: 2023

卷: 47

页码: 228-243

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