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 the cracks along the faying interface avoiding the interface fracture… read more. Open Access TECHNICAL ARTICLE
Graphical abstract. Credit: Materials & Design, Volume 221, September 2022, 111022