LAUSR

Abstract In this work, TA2/Q235 was used as an composite interlayer to prevent the formation of these brittle Ti-Fe intermetallics when joining TC4 Ti alloy to 304 stainless steel (SS). The TA2/Q235 composite interlayer was prepared by explosive welding. The laser was focused on the TC4-TA2 interface, which joined the TC4 and TA2 by fusion welding. At TC4-TA2 interface, a weld zone was formed due to the mixing of molten TC4 and TA2. The laser was focused on the Q235-304 SS interface, a weld zone was formed due to the mixing of molten Q235 and 304 SS. Composite interlayer TA2/Q235 was used to prevent the formation of Ti-Fe intermetallics during welding and improve microstructure and properties of the Ti alloy-SS joint. The joint fractured at the TA2/Q235 explosive welding interface with the maximum tensile strength of 548 MPa.