https://commons.ru.ac.za/vital/access/manager/Index en-us 5 https://commons.ru.ac.za/vital/access/manager/Repository/vital:10423 Wed 12 May 2021 22:17:41 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:9356 Wed 12 May 2021 17:45:32 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:9629 75 percent joint efficiency). High Vickers microhardness values were measured at the joint interfaces, which corresponded with the intermetallic compounds. The Energy Dispersive Spectroscopy analysis revealed the presence of thin layers of intermetallics in nanoscale at the interfacial regions. The diffractograms of the X-Ray Diffraction analysis showed small peaks for intermetallics in some of the welds. Low electrical resistivities were measured at the joint interfaces. The statistical analysis showed that the downward vertical force, (Fz) can significantly influence the resulting weld qualities. An overall summary of the analysis of the weld qualities - with respect to the shoulder diameter tools employed showed that the 18 mm shoulder diameter tool is most appropriate among the three shoulder diameters considered, and a process window of medium spindle speed of 950 rpm and low-to-medium feed rate between 50 and 150 mm/min is established for FSW of Aluminium and Copper. Welds produced at 1200 rpm and 300 mm/min with low heat input did not have intermetallics formed at the joint interface.]]> Thu 13 May 2021 06:36:12 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:9341 Thu 13 May 2021 04:41:25 SAST ]]>