%0 journal article
%@ 0043-2288
%A Cardillo, M.E.B.,Shen, J.,de Alcantara, N.G.,Afonso, C.R.M.,dos Santos, J.F.

%D 2019
%J Welding in the World
%N 1
%P 33-41 
%R doi:10.1007/s40194-018-0632-4
%T Effect of friction spot welding parameters on the joint formation and mechanical properties of Al to Cu
%U https://doi.org/10.1007/s40194-018-0632-4
1 
%X Friction spot welding is an appealing technique for joining dissimilar materials, such as aluminum and copper that have significant differences in physical and mechanical properties. To optimize the welding process, a full-factorial design was employed. It is found that in addition to the plunge depth, the interaction between the rotational speed and the plunge depth significantly influences the lap-shear strength of the Al/Cu dissimilar joints. Further investigations on macro- and microstructures show that increasing the plunge depth could deform the Cu sheet into a concave shape to form a mechanical interlocking, and thus increase the joint lap-shear strength; increasing the tool rotational speed, however, may compromise this effect because of the formed tunnel defects on the interface due to high thermal exposure.