Electron Beam Bonding has the potential to effectively join additively manufactured carbon fiber-reinforced thermoplastic composites with aluminum alloys, achieving a maximum lap-shear strength comparable to the tensile strength of the short carbon fibers, without requiring any surface treatment. Using this method, additively manufactured aluminum alloys were successfully bonded with both short- and continuous-fiber composites (sCF-PA6, cCF-PA6, sCF-PEKK, cCF-PEKK). Lap-shear tests showed that the short-fiber-reinforced composites failed within the composite material itself, indicating that the joint strength exceeded the tensile strength of the composite substrates.
Despite its high cost, electron beam technology is an effective tool for developing and testing joining processes for sensitive materials. It allows the precise determination of optimum joining temperatures, heating rates, and strategies.
