Reference : Laser welding of copper to aluminum with spiral trajectory and identification of exce...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
Physics and Materials Science
http://hdl.handle.net/10993/51075
Laser welding of copper to aluminum with spiral trajectory and identification of excessive aluminum melting
English
Mathivanan, Karthik mailto [University of Luxembourg > Faculty of Science, Technology and Medecine (FSTM) > >]
Plapper, Peter mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE) >]
Mathivanan, Karthik mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE) >]
18-Jan-2022
Journal of Laser Applications
Laser Institute of America
Yes
International
1042-346X
United States
[en] laser dissimilar welding ; optimum Cu–Al weld, ; optical emission ; plasma plume
[en] Laser welding of copper and aluminum is challenging due to the formation of complex intermetallic phases. Only a defined amount of Al and Cu can be melted because of the limited solubility of Al–Cu systems. Finding the optimum melting is critical for a strong joint. Optical emission during the welding process contains the metal vapor of Al metal that is being welded. This is a good indicator for monitoring the welding process. This research paper focuses on the optical emission of Al from the bottom sheet during welding of Cu (top) and Al (bottom) in overlapped configuration for a spiral trajectory. The emitted signal in the range of 395 nm (±3 nm) from the bottom sheet of aluminum is used to identify excessive Cu–Al welding. The tensile shear strength, microstructure, and welding signal in the time domain for optimum and excessive weld conditions are investigated. In this study, a technique using a photodiode is shown to identify the excessive melting of Al during the welding process in real time.
European Regional Development Fund
http://hdl.handle.net/10993/51075
10.2351/7.0000545
https://lia.scitation.org/doi/abs/10.2351/7.0000545

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