Reference : Autogenous Laser welding of copper to aluminium

	Document type :	Scientific congresses, symposiums and conference proceedings : Poster
	Discipline(s) :	Engineering, computing & technology : Mechanical engineering
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/36699

Title :	Autogenous Laser welding of copper to aluminium
Language :	English
Author, co-author :	Mathivanan, Karthik [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Plapper, Peter [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Publication date :	13-Sep-2018
Number of pages :	A0
Peer reviewed :	No
On invitation :	No
Audience :	International
Event name :	11th International Conference on Photo-Excited Processes and Applications – ICPEPA 11
Event date :	10-09-2018 to 14-09-2018
Event organizer :	Department of Laser Technologies ,Center for Physical Sciences and Technology
Event place (city) :	Vilnius
Event country :	Lithuania
Keywords :	[en] Laser welding ; Aluminium-copper ; intermettalics
Abstract :	[en] This work investigates laser joining of copper sheets to aluminium in overlap configuration. Dissimilar Cu-Al connections are widely used in the electrical and electronics applications e.g. battery and solar panels.Joining these materials is a very critical assembly process. The laser welding from the aluminium surface to copper (Al-Cu) is well described in the literature .But there is no data concerning the laser seam welding from the copper side to join with aluminium i.e Cu-Al.The selection of aluminium surface to irradiate is mainly because of poor absorption of copper to laser in IR region.But high intensities of about 100 MW/cm2 allow for initial vaporization of copper surface.Once the keyhole is generated, absorption of laser light is improved.Thereby high power lasers allow for successful penetration of copper surface to produce a joint with aluminium. The main objective is to investigate the approach of dissimilar laser welding starting from the copper surface to aluminium.The effect of process parameters on the shear force, microstructure and weld pool dimensions are studied.An experimental design is realized to see the effect of laser irradiation of copper surface (Cu-Al) in contrast to aluminium surface(Al-Cu). The selection of aluminium or copper surface is mainly dependent on the laser power.With the high power disk laser the possibility of joining from the copper side was evident and results of joining copper to aluminium and aluminium to copper are comparable.Therefore welding from a highly reflective surface to achive a comparable shear strength is demonstrated.
Research centres :	LTCC,University of luxembourg
Funders :	University of Luxembourg - UL
Name of the research project :	Process analysis of laser welding of dissimilar metals like aluminium and copper
Target :	Researchers
Permalink :	http://hdl.handle.net/10993/36699

	File(s) associated to this reference
	Fulltext file(s): File Commentary Version Size Access Limited access ICPEPA Programme Book 212p.pdf Abstract Proceeding of ICPEPA - 11 ,Lithuania Publisher postprint 11.98 MB Request a copy

All documents in ORBi^lu are protected by a user license.

 

University of Luxembourg Library |  Feedback |  Legal notices Site Map