Reference : Correlation of Optical Signal During Laser Fusion Welding of Copper to Aluminum
Scientific congresses, symposiums and conference proceedings : Paper published in a journal
Engineering, computing & technology : Mechanical engineering
Physics and Materials Science
http://hdl.handle.net/10993/46029
Correlation of Optical Signal During Laser Fusion Welding of Copper to Aluminum
English
Mathivanan, Karthik mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE) >]
Plapper, Peter mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE) >]
5-Jan-2021
Journal of Laser Applications
33
1
Proceedings of the International Congress of Applications of Lasers & Electro-Optics 2020
Yes
No
International
Proceedings of the International Congress of Applications of Lasers & Electro-Optics 2020
18-10-2020 to 21-10-2020
Laser Institute of America
[en] Laser welding ; Al-Cu weld ; welding signal ; plasma plume ; Intermetallic phases
[en] Laser joining of dissimilar metals, copper and aluminum, allows for the precise delivery of laser energy and high process speed. The keyhole-based process is very efficient for welding Al–Cu, considering the high reflectivity and thermal conductivity of the materials joined. For the Al–Cu system, the formation of detrimental intermetallic compounds is the main issue. Fusion welding with laser as a heat source involves the melting of metals. However, the high speed of the laser welding process is advantageous for terminating the excessive melting of Al and Cu and eventually controlling the detrimental intermetallic phases. Therefore, information pertaining to melted material is an important criterion for achieving joint strength. In this paper, the photodiode signal measured during the laser welding of Cu to Al is investigated as a process monitoring technique. In welding from Cu to Al, the melting of Al (bottom sheet) is very critical for joint strength. The amount of Al material that can be intermixed in Cu depends on the solubility limit of the Al–Cu system. The plasma plume emission during laser welding is used to extract the rapid melting of Al. This study shows the correlation of the Al characteristic peak at a wavelength of 396 nm with the shear strength of the joint.
European Regional Development Fund
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/46029
10.2351/7.0000314

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