Abstract
Friction Stir Welding (FSW) is a solid state
welding process used for welding similar and dissimilar
materials. The process is widely used because it produces
sound welds and does not have common problems such as
solidification and liquefaction cracking associated with the
fusion welding techniques. The FSW of Aluminium and its
alloys has been commercialised; and recent interest is focused
on joining dissimilar materials. However, in order to
commercialise the process, research studies are required to
characterise and establish process windows. In particular,
FSW has inspired researchers to attempt joining dissimilar
materials such as aluminium to copper which differ in
properties and sound welds with none or limited intermetallic
compounds has been produced. In this paper, we review the
current research state of FSW between aluminium and copper
with a focus on the resulting weld microstructure, mechanical
testing and the tools employed to produce the welds and also an
insight into future research in this field of study.