[en] The laser polishing surface treatment is a prerequisite for enhanced weldability that is enabled by superior adhesion between the weldments. The paper describes the laser polishing process of the aluminum surface to develop a relatively thick and porous artificial aluminum oxide layer. Microscopic observation shows the laser polishing process significantly improves the adhesion of molten polyamide to the aluminum surface. Besides, the shear load of the pretreated joints is much higher than that of as-received ones. However, for the majority of the welded samples, the failure happens at the polyamide near the interface of aluminum/polyamide due to the thermal effect and structural changes of polyamide during the welding process. By applying the post-treatment of the welded specimens with different cycles, the mentioned failure mechanism is not observed anymore. Therefore, the mechanical properties of the joint will be improved and reach to the limits of the base materials.
Fonds National de la Recherche - FnR
Process Innovation for Sensors in Mobile Applications Based on Laser Assisted Metal-Plastic Joining
FnR ; FNR11633333 > Mahdi Amne Elahi > > Process Innovation for Sensors in Mobile Applications Based on Laser Assisted Metal-Plastic Joining > 01/11/2017 > 31/10/2021 > 2017
[University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
