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Proceedings Paper

Laser beam welding aerospace aluminum using fiber lasers
Author(s): Milton S. F. Lima; Rudimar Riva; Aline C. de Oliveira; Gabriel R. Siqueira
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Paper Abstract

This work intends to contribute towards the knowledge of AA6013 aluminum alloy weldability, autogenously welded with a high-power fiber laser. The quality and metallurgical characterization of the welds were done considering laser speed and power as process parameters. The present study shown that is possible to obtain welds with good macroscopic quality; i.e. with regular welds borders and without the presence of holes, cracks or porosities in speeds around 5 m/min using 1 kW laser power. Additionally, it had been verified that the liquation zone is well confined around 50 μm. The presence of porosities in longitudinal cuts was linked to keyhole instabilities, which could be appropriately controlled by the process parameters. Although this alloy is known for some propensity for solidification cracking, any cracking was verified. This could be linked to an appropriate thermal cycle during welding due to the high quality laser beam, which produces short solidification interval. The present results indicate that other difficult-to-weld Al-based alloys could be properly joined using the fiber laser.

Paper Details

Date Published: 21 April 2009
PDF: 4 pages
Proc. SPIE 7131, XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 713128 (21 April 2009); doi: 10.1117/12.815278
Show Author Affiliations
Milton S. F. Lima, Instituto de Estudos Avançados (Brazil)
Rudimar Riva, Instituto de Estudos Avançados (Brazil)
Aline C. de Oliveira, Instituto Tecnológico de Aeronáutica (Brazil)
Gabriel R. Siqueira, Empresa Brasileira de Aeronautica SA (Brazil)

Published in SPIE Proceedings Vol. 7131:
XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Rui Vilar; Olinda Conde; Marta Fajardo; Luís O. Silva; Margarida Pires; Andrei Utkin, Editor(s)

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