Mechanical and Microstructural Investigation of Dissimilar Resistance and Friction Stir Spot Welds in AA5754‐H22 and AA6082‐T6 Al Alloys and 22MnB5 Hot‐Stamped Boron Steel

Friction Stir Weldability at High Welding Speed of Two Structural High Pressure Die Casting Aluminum Alloys

“…An onion ring shape structure is reported to be formed by particlerich bands, geometrical features and microstructural changes [19,21,47,48] This particular pattern has been originated by the successive shearing of the materials layers from the front to the back of the FSW tool. Its fine structure is produced by continuous dynamic recrystallization, because in contrast to the TMAZ, the heat and plastic strain have been enough to promote it [49][50][51]. Several authors reported a uniform distribution of fine and near spherical Si particles in the aluminum matrix of the stir zone for Al-high Si alloys as it is observed in the present work [18,20,23].…”

Joining of dissimilar materials

“…Pasic et al [185] applied the commercial DeltaSpot RSW process originally developed for Al RSW using a CrNi process tape on the Al side and a Ni-coated band on the steel side and measured a 2.5 mm IMC layer thickness. Da Silva et al [62] also used DeltaSpot but were not able to change the heat imbalance and move the porosity away from the Al-Steel faying interface, which deteriorated the mechanical properties. Another method to impact the heat imbalance between the Al and steel is through manipulation of electrode materials or geometries.…”