[en] Aluminum and Copper were joined using the laser-based braze-welding process. By avoiding the intermixture of both conductive materials, the formation of brittle intermetallic compounds is strongly reduced. This results in a tough, ductile connection with reduced electric resistance. This paper de-scribes a method, which is based on the 4-wire method, to measure the resistance of the weld seam. The arrangement of the conductive electrodes directly on top and bottom of the weld seam signifi-cantly increases the accuracy of the measured resistances, thus offers a direct estimation of the inter-metallic layer thickness. The electric measuring of the layer thickness is a non-destructive method, which assists in the reduction of the post-process effort (cross sections, pull tests, hardness measure-ments) and decreases the lead-time by reducing the time needed for the identification of suitable laser process parameters.
Research center :
RUES
Disciplines :
Materials science & engineering
Author, co-author :
Schmalen, Pascal Guy ; 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
External co-authors :
yes
Language :
English
Title :
Resistance measurement of dissimilar Al/Cu laser welds
Alternative titles :
[lb] Widerstandsmoßen vun artongleichen laser-schweesverbindungen Al/Cu
Publication date :
July 2017
Journal title :
Proceedings of LPM2017 - the 18th International Symposium on Laser Precision Microfabrication
FnR Project :
FNR10155468 > Pascal Guy Schmalen > CoLaWeDi > Closed-Loop Control Of The Laser-Braze Welding Process Of Dissimilar Materials > 01/09/2015 > 14/03/2018 > 2015