Product Code: ICA11_309

Laser Beam Welding with High-Frequency Beam Oscillation: Welding of Dissimilar Materials with Brilliant Fiber Lasers
Authors:
Mathias Kraetzsch, Fraunhofer Institute for Material and Beam Technology (IWS); Dresden Germany
Jens Standfuss, Fraunhofer Institute for Material and Beam Technology (IWS); - USA
Annett Klotzbach, Fraunhofer Institute for Material and Beam Technology (IWS); -
Joerg Kaspar, Fraunhofer Institute for Material and Beam Technology (IWS); -
Berndt Brenner, Fraunhofer Institute for Material and Beam Technology (IWS); Dresden Germany
Eckhard Beyer, Fraunhofer Institute for Material and Beam Technology (IWS), Dresden University of Technology; Dresden Germany
Presented at ICALEO 2011

Brilliant laser beam sources in connection with a high frequent beam oscillation make it now possible to join metallic material combinations, which have been con-ventionally 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 meld pool life time. These allow an extensive reduction of the heat input. On the other side the melting behaviour at me-tallic mixed joint, seam geometry, meld pool turbu-lence and solidification behaviour can be influenced by a high frequent time-, position- and power-controlled laser beam oscillation.