Laser pressure welding of copper

Jingquan Zhang, Ting Huang, Sergey Mironov, Dong Wang, Qingwei Zhang, Qiang Wu, Jiejie Xu, Rongshi Xiao

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Industrial application of copper often requires a joining. Unfortunately, a commercial laser welding of this material is challenging due to extremely high reflectivity of copper at the near-infrared wavelength. In this work, the sound copper joints were produced at relatively high welding speed of 15 m/min by using a pressure-assisted fiber-laser welding. It was theoretically shown that the material melting arisen from a convergence of multiple reflections of the laser beam. By using electron backscatter diffraction (EBSD), it was found that microstructural changes were induced by a laser-induced thermal effect as well as a roller-induced pressure. It was deduced that the molten material solidified before feeding to the pressure rolls and thus it experienced a notable plastic strain during the welding process. The present work provides an effective method for commercial joining of high-reflective metals by using the near-infrared fiber laser.

Original languageEnglish
Article number106645
JournalOptics and Laser Technology
Publication statusPublished - 2021 Feb


  • Copper
  • Laser welding
  • Microstructure
  • Weld formation mechanism


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