KEYWORDS: Aluminum, Fiber lasers, Aerospace engineering, Solids, Surface plasmons, High power fiber lasers, Corrosion, Process control, Resistance, Laser development
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.
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