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Efficiency and Quality at Deep Alloying of Light Metals by Using a Fast Modulated Highly Intensive Laser Beam (Ha 5257/1-1)
During laser material processing it can basically be distinguished
heat conduction processes and deep penetration processes concerning the
energy coupling in the specimen. Deep penetration processes are
characterized by more efficient energy coupling as well as a melt pool
movement with higher dynamics. Laser alloying/dispersing respectively
were realised as pure heat conduction processes until now. From that
follows an inhomogeneous distribution of the filler materials inside
the track in many cases caused by gravity segregation and/or a
necessary intense overlapping of the tracks in consequence of the lens
shaped track geometry.
The present research project should realise laser alloying/dispersing
of light metals with spatial and temporal modulated laser radiation of
a fibre laser among use of the deep welding process i.e. by modulating
the convection of the molten pool via keyhole.
Funded by
DFG
Timeframe
2006/06/01 - 2008/03/01
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