Study on Interface Control of CFRTP-TC4 alloy Laser Joining

The connection between the carbon fibers reinforced thermo-polymer (CFRTP) and the titanium alloy hybrid structure is the key to realize aircraft lightweight and high strength manufacturing. In this study, the laser joining method is used to join CFRTP and titanium alloy. The influence of boundary state on the strength of CFRTP-TC4 joint is studied by preparing different size micro-textures on TC4 alloy surface. The result indicated that the smaller of the line spacing of micro textures on the TC4 alloy surface, the higher of the connection strength, and a high strength CFRTP-titanium alloy joint can be obtained by adding PA resin layer in the interface of CFRTP and titanium alloy.