Abstract
In this research study, material characterization of dissimilar friction stir spot welded
Aluminium and Copper was evaluated. Rotational speeds of 800 rpm and transverse speeds of
50 mm/min, 150 mm/min and 250 mm/min were used. The total numbers of samples evaluated
were nine altogether. The spot welds were characterised by microstructure characterization
using optical microscope (OEM) and scanning electron microscopy technique (SEM) by
observing the evolution of the microstructure across the weld’s cross-section. lap-shear test of
the of the spot weld specimens were also done. From the results, it shows that welding of
metals and alloys using Friction stir spot welding is appropriate and can be use in industrial
applications.