The master thesis project elaborates results on laser welding of a drive clutch mounted on VT3 punch powertrain engine. The proposed research project consists in the development of a methodology to define the main influent parameters on a laser welding weld bead for a drive clutch. The study will be conducted through a statistical instrument in parallel to a deep metallographic analysis. In particular an experiment will be planned (DOE) in order to define the most influent parameters and it will be intensified afterwards through a GLM analysis. A the same time, metallographic inspections by optical and stereoscopic microscope and NDT inspections by eddy current will be exploited to acquire information on thermally altered areas.