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Metallurgist

05-09-2024

Laser welding of aluminum-calcium alloys based on ((Al) + Al₄(Ca, La)) eutectic

Authors: N. V. Letyagin, T. K. Akopyan, P. A. Palkin, S. O. Cherkasov, A. B. Lyukhter, I. S. Pechnikov

Published in: Metallurgist

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Abstract

The influence of laser welding modes on the structure and properties of butt joints formed for the models of cast sample—cast sample, wrought sample—wrought sample, as well as a hybrid joint of a cast and a wrought sample of Al3Ca0.5La1Mn aluminum-calcium alloy, was studied. The influence of welding parameters on the quality of the weld was evaluated using structural and mechanical tests. The optimal welding parameters were identified as follows: laser power of 1400–1600 W, welding speed of 20 mm/s, focal length of 193 mm, and argon flow rate supplied to the welding zone of 15 L/min. This resulted in the formation of a high-quality welded joint with low porosity and the absence of cracks. The variation in the mass fraction of alloying elements in the process of laser welding of aluminum-calcium alloys was revealed. Under optimal laser welding modes, calcium evaporation in the melting zone is approximately 6.5–10.3%. The obtained joints exhibit a factor of safety of 0.71–0.83 of the ultimate strength of the base metal.

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Title: Laser welding of aluminum-calcium alloys based on ((Al) + Al4(Ca, La)) eutectic
Authors: N. V. Letyagin
T. K. Akopyan
P. A. Palkin
S. O. Cherkasov
A. B. Lyukhter
I. S. Pechnikov
Publication date: 05-09-2024
Publisher: Springer US
Published in: Metallurgist
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI: https://doi.org/10.1007/s11015-024-01775-6