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作者:

Du, Weizhe (Du, Weizhe.) | Huang, Xuting (Huang, Xuting.) | Zheng, Min (Zheng, Min.) | Xiao, Rongshi (Xiao, Rongshi.) (学者:肖荣诗) | Xu, Jiejie (Xu, Jiejie.) | Huang, Ting (Huang, Ting.)

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EI Scopus SCIE

摘要:

Micro-welding of Al and Cu foils is increasing used in various industries, particularly in the production of battery components for electric vehicles. However, direct fusion welding of Al and Cu may compromise joint mechanical properties due to the formation of brittle intermetallic compounds (IMC). Consequently, strategies for controlling IMC to enhance joint mechanical properties have received significant research attention. In this study, lap welds of 1050 Al foil and T2 Cu foil (both 200 mu m thick) are achieved using a single-mode fiber laser equipped with a scanning galvanometer. This setup enables spatial power modulation for laser spot welding via beam spiral scanning. Notably, laser fusion welding occurs along the laser beam scanning path, while laser weld-brazing is achieved through heat conduction in the spiral spacing between the adjacent scanning paths, resulting in a hybrid joint with alternated fused and brazed areas. The laser weld-brazing areas expand the effective connection area of the joint, improving its load-bearing capacity while effectively controlling IMC compared to fusion joints. The screw-type hybrid joints exhibit excellent mechanical properties, with a maximum tensile strength of 140 MPa. Experimental and simulation results indicate the mechanism for hybrid joint formation and improvement in mechanical properties. This study provides an effective strategy for regulating joint microstructure to mitigate the negative influence of IMC.

关键词:

Mechanical properties Laser weld-brazing Al/Cu dissimilar joint Microstructure Laser welding

作者机构:

  • [ 1 ] [Du, Weizhe]Beijing Univ Technol, High Power & Ultrafast Laser Mfg Lab, Beijing 100124, Peoples R China
  • [ 2 ] [Huang, Xuting]Beijing Univ Technol, High Power & Ultrafast Laser Mfg Lab, Beijing 100124, Peoples R China
  • [ 3 ] [Zheng, Min]Beijing Univ Technol, High Power & Ultrafast Laser Mfg Lab, Beijing 100124, Peoples R China
  • [ 4 ] [Xiao, Rongshi]Beijing Univ Technol, High Power & Ultrafast Laser Mfg Lab, Beijing 100124, Peoples R China
  • [ 5 ] [Xu, Jiejie]Beijing Univ Technol, High Power & Ultrafast Laser Mfg Lab, Beijing 100124, Peoples R China
  • [ 6 ] [Huang, Ting]Beijing Univ Technol, High Power & Ultrafast Laser Mfg Lab, Beijing 100124, Peoples R China

通讯作者信息:

  • [Xiao, Rongshi]Beijing Univ Technol, High Power & Ultrafast Laser Mfg Lab, Beijing 100124, Peoples R China;;[Huang, Ting]Beijing Univ Technol, High Power & Ultrafast Laser Mfg Lab, Beijing 100124, Peoples R China;;

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来源 :

OPTICS AND LASER TECHNOLOGY

ISSN: 0030-3992

年份: 2024

卷: 180

5 . 0 0 0

JCR@2022

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SCOPUS被引频次: 3

ESI高被引论文在榜: 0 展开所有

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