Humping mechanisms during high-speed welding with brilliant lasers Available to Purchase

Further developments in laser beam sources as fiber and thin disk lasers allow deep penetration welding with unrivalled welding speeds because of their high brilliance. Thereby imperfections in the welding seam may occur - particularly humping as well as spatters. The humping phenomenon during the high-speed welding process at high aspect ratios creates a periodic beaded weld seam. Basic understanding of humping is the precondition to allow a larger range of application relating to an increase in welding speed. Visual and infrared high-speed videos show the location and the formation of the humps. Additionally, the melt flow can be visualized by cross-and longitudinal-sections of the weld seam. An indicator material is used for a better characterization of the melt flow. These observations allow to investigate the basics of the humping mechanisms and to find measures to suppress it.