Laser-matter interaction and applications to in-process monitoring in keyhole laser welding Available to Purchase

In the present article, fundamental study is described concerning laser-matter interaction in laser welding of heavy sections up to 20mm in thickness and ultra-thin foils of 10μm in thickness by using CO₂, Nd:YAG and Yb single mode fiber lasers mainly from experimental point of views. The fundamental study contains keyhole behavior and the characterization of laser-induced plume. It is shown that the laser-matter interaction depends on laser (wavelength, power density, spot size etc), gas species in the atmosphere and material to be welded. One of the most interesting applications of the fundamental study is monitoring of the weld quality, which can estimate the weld quality, dimensions of weld bead, and laser welding parameters during welding.