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Author:

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.)

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EI Scopus SCIE

Abstract:

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. © 2023 Elsevier Ltd

Keyword:

Aluminum alloys Friction stir welding Textures Grain boundaries Microhardness Research laboratories Tensile strength Grain size and shape Heat affected zone Friction Microstructural evolution Silicon Particle size analysis Dynamic recrystallization

Author Community:

  • [ 1 ] [Cui, Li]Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing; 100124, China
  • [ 2 ] [Wu, Defan]Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing; 100124, China
  • [ 3 ] [Chang, Yaoqing]Tianjin Long March Launch Vehicle Manufacturing Co. Ltd., Tianjin; 300462, China
  • [ 4 ] [Guo, Xingye]Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing; 100124, China
  • [ 5 ] [Wu, Xu]Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing; 100124, China
  • [ 6 ] [Shao, Wei]Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing; 100124, China
  • [ 7 ] [He, Dingyong]Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing; 100124, China

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Source :

CIRP Journal of Manufacturing Science and Technology

ISSN: 1755-5817

Year: 2023

Volume: 47

Page: 228-243

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 4

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 8

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