The complexity of many of these new engine components involves the necessity of development of reliable
joining and “manufacturing by material deposition” technologies, as alternatives to other manufacturing processes,
such as machining, casting or forging. In this study, the laser welding of three different superalloys has been
performed and analysed (alloy 718 -“Inco 718”-, “René 41” and alloy –“Inco 625”-). Due to the reduced extension
of the heat affected zone (HAZ), and potential high quality and high ratio “depth/width” of the welded seams, laser
welding has been a first manufacturing joining technology candidate to new designs of components for new aircraft
engines. In this paper, the laser welding trials results, properties obtained, and development of the homologation
laser welding process are described.