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Laser beam welding with high-frequency beam oscillation: Welding of dissimilar materials with brilliant fiber lasers

: Krätzsch, M.; Standfuß, J.; Klotzbach, A.; Kaspar, J.; Brenner, B.; Beyer, E.

Washio, Kunihiko ; Laser Institute of America -LIA-:
ICALEO, 30th International Congress on Applications of Lasers & Electro-Optics. Congress proceedings. CD-ROM : October 23 - 27, 2011, Orlando, FL, USA, Hilton in the Walt Disney World Resort
Orlando, Fla.: LIA, 2011 (LIA 614)
ISBN: 978-0-912035-94-9
International Congress on Applications of Lasers & Electro Optics (ICALEO) <30, 2011, Orlando/Fla.>
Fraunhofer IWS ()

Brilliant laser beam sources in connection with a high frequent beam oscillation make it now possible to join metallic material combinations, which have been conventionally non-laser weldable up to now. It concerns especially such combinations like Al-Cu, where brittle intermetallic phases occur. Extreme small weld seam with high aspect ratio leads to very short melt pool life time. These allow an extensive reduction of the heat input. On the other side the melting behavior at metallic mixed joint, seam geometry, chemical composition, melt pool turbulence and solidification behavior can be influenced by a high frequent time-, position-and power-controlled laser beam oscillation.