[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.
Disciplines :
Materials science & engineering
Author, co-author :
Amne Elahi, Mahdi ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Koch, Marcus
Heck, Mike
Plapper, Peter ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
External co-authors :
yes
Language :
English
Title :
Pre and post-treatments to improve weldability and mechanical properties of Aluminum-Polyamide laser welded specimens
Publication date :
16 September 2020
Journal title :
Procedia CIRP
ISSN :
2212-8271
Publisher :
Elsevier, Netherlands
Special issue title :
11th CIRP Conference on Photonic Technologies [LANE 2020] on September 6-10, 2020
FNR11633333 - Process Innovation For Sensors In Mobile Applications Based On Laser Assisted Metal-plastic Joining, 2017 (01/11/2017-31/10/2021) - Mahdi Amne Elahi
Name of the research project :
Process Innovation for Sensors in Mobile Applications Based on Laser Assisted Metal-Plastic Joining