Laser-adhesive hybrid bonding of dissimilar metals between steel and aluminum alloy

Fiber laser was adopted with adhesive layer to join 1.4 mm thick DC56D+ZF galvanized steel and 1.2 mm thick 6016 aluminum alloy sheets.The microstructure,fracture appearance and mechanical properties of the joint were investigated.The influences of welding parameters on the weld appearance were analyzed.The results show that with the addition of adhesive layer,no pores or cracking were observed on the welds.The average shearing strength and shearing load of the steel/aluminum joint were 41 MPa and 1.04 kN.The failure mode of welded joint presented a mixture of ductile and quasi-cleavage fractures.