Abstract
Modern fiber-bound or mirror-optical manipulation of the laser beam to adapt intensity distribution in the area of the weld pool dominate recent developments for process stabilization and thus for quality improvement, for example for e-mobility applications. Especially the use of beam manipulation for material-oriented adaptation of the welding process appears very promising. In this paper, the new opportunity of high dynamic beam shaping (DBS) for the prevention of hot cracks in age-hardenable aluminum alloys is described in order to avoid the otherwise necessary addition of filler metal. The results from laboratory experiments show that, depending on the joint geometry and the Al-alloy, typical hot crack formations in the weld metal will be almost completely suppressed. Furthermore, for the first time it is possible to overcome metallurgical limitations in laser beam welding with remote optics by using this intensity-based approach.
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