GROZA Cosmin

Spoluautoři BUZDUGAN Dragos, MITELEA Ion

The welding of titanium alloys having a α + β structure with austenitic stainless steels can not be done directly by a melting process, due to the appearance of intermetallic phases in the mixing of the molten materials that promotes the cracking phenomena. Changing the chemical composition of the molten bath is the only way to obtain a melt joint directly. The purpose of this paper aims the modelling of the main process parameters of Nd-YAG continuously laser welding using a copper foil with a thickness of 600 μm between the two materials, which solves largely the metallurgical incompatibility. The results obtained using a full factorial design, corroborated with metallographic investigations defines the optimal values of the laser beam power, welding speed and laser beam position.