Abstract
Dissimilar metal joining methods are essential for
the manufacturing of a various structures and parts in the
industries. Friction stir spot welding process was performed on
3 mm thick AA1060 and C11000. This paper presents the
results on the microstructure, chemical analysis and electrical
resistivities of the produced joints. The microstructure showed
a contrast between the two different materials namely copper
and aluminium and the presence of a copper ring (hook) in all
the produced spot welds. The presence of copper particles in
the aluminium matrix was observed in most of the welds. The
conducted energy dispersive spectroscopy (EDS) analysis
confirmed the presence intermetallic compounds. It was
observed that, the spot weld produced using 800 rpm and 1
mm shoulder plunge depth exhibited a low electrical resistivity
value of 0.009 μΩ, which shows an appreciation of 0.011 μΩ
(55 %), compared to the average of the parent materials (0.020
μΩ). This could be an attractive option for electrical
applications.