DISC LASER WELDING OF MG ALLOY AZ61A

1 KRAMÁR Tomáš
Co-authors:
1 VONDROUŠ Petr 1 KOLAŘÍK Ladislav 2 SAHUL Miroslav
Institutions:
1 Czech Technical University in Prague, Faculty of Mechanical Engineering in Prague, Technická 4, 166 07 Prague 6, Czech Republic
2 Slovak University of Technology in Bratislava, Faculty of Materials Science & Technology in Trnava, Paulinska 16, 917 24 Trnava, Slovak Republic
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
1534-1539
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
261 views / 90 downloads
Abstract

Material AZ61A of thickness 1 mm was laser welded by disc laser without using filler wire. Laser welding w/o filler wire is very demanding on sheet metal edges preparation, so different methods of edge preparation, e.g. shearing, milling, were done. Mg alloys have susceptibility to porosity, evaporation of alloying elements, spattering hot cracking and other. The research focused on finding optimum laser welding parameters for butt and lap welds. Welds were evaluated by optical metallography, visual and penetration test, SEM, microhardness and tensile strength etc. The sheet metal edges for butt welds must be prepared by milling, otherwise porosity was found. Edge quality was not important for lap joint welds, which is an advantage. Laser welding had very good weld quality, without any defect, yet the processing window was narrow.

Keywords: magnesium alloy, laser beam welding, AZ61A

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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