Material characterization and mechanical performance of laser diffusion welded joint between titanium alloy and stainless steel

摘要

The new laser diffusion welding method with Monel 400 interlayer was applied to control the Ti-Fe IMCs generated in the welding of titanium (Ti) alloy and stainless steel (SS). The joints produced by the new method have two welding mechanisms: fusion welding and diffusion welding. Fusion welding was used to connect high compatibility SS and Monel 400 interlayer, diffusion welding was used to connect Monel 400 interlayer and Ti alloy which would produce Ti-based IMCs. The effect of new laser welding technology on the microstructure and mechanical properties of SS-Ti alloy butt joint was studied. The joint fractured at Monel 400-Ti alloy interface with a maximum tensile strength of 216 MPa.