Current Trends in Friction Stir Welding (FSW) and Friction Stir Spot Welding (FSSW) An Overview and Case Studies - Mubiayi, Mukuna Patrick; Mubiayi, Mukuna Patrick; Akinlabi, Esther Titilayo; Makhatha, Mamookho Elizabeth (Springer International Publishing : Imprint: Springer, 2019)