Jointing of CFRP/5083 Aluminum Alloy by Induction Brazing: Processing, Connecting Mechanism, and Fatigue Performance

Carbon fiber reinforced polymer (CFRP) is widely used in the lightweight design of high-speed trains due to its high specific strength. In order further reduce weight train body, it necessary study joining process and fatigue properties CFRP/aluminum alloys (CFRP/Al) structure. this work, CFRP plate 5083P-O aluminum were successfully connected by an induction brazing method. The optimum parameters determined be temperature 290 °C, a normal pressure 200 kPa, holding time 5 s. After 5083 was pre-anodized, tensile strength CFRP/5083 joint reached maximum value 176.5 MPa. anodization introduced more surface micro-structures on plate, leading better wetting behavior between oxide film. Meanwhile, new chemical bond, Al-O-C, also formed at interface joint. limit calculated 71.68 MPa through high-cycle (HCF) testing. cracks initiated from CFRP/oxide film, then propagated base metal. Finally, film peeled off metal under shear stress, which contributed fracture bonding alloy far conventional welded joints. Therefore, feasible approaches should proposed obtain robust future.