Friction Stir Welding For Al-And Its Alloys

Abstract

Friction stir welding (FSW) is a solid state joining process that provides many advantages such as microstructure and mechanicalproperties than conventional methods in welding aluminum alloys. When compared with conventional fusion welding methods it gives advantages such as lower residual stresses, especially high joint strength and low distortion because of lower welding temperature and also elimination of porosities and solidification cracking because of no melting occurrence.The FSW process exhibits a number of attractive advantages when compared to other welding processes, perhaps the most significant of which is the ability to weld alloys that are difficult or impossible to weld using fusion welding techniques. In this review the microstructures and mechanical properties of friction stir welding of various Al-alloys.