Phys.org  September 5, 2022 To join aluminum to steel researchers in China proposed an innovative hybrid resistance spot-laser welding process. The welding current distribution and the weld structure were optimized to produce a thin and uniform intermetallic layer with its thickness below 1.2 μm. The faying interface morphology of aluminum and steel dissimilar materials was changed from a traditional flat surface to an interface with a deep bulge into the aluminum weld. The presence of a weak bonding area around the periphery of the joint facilitated the crack initiation and rapid propagation. Laser spot welding process inhibited rapid propagation of […]