Paper Title
Heat Treatment of Friction STIR Welded Magnesium Alloys: A Review

Magnesium alloy has the potential to be used extensively in lightweight applications in foremost industries i.e. land transportation, aerospace, railway, shipbuilding and marine, construction, and many other industrial applications. These alloys can be welded using gas metal arc welding, electron beam welding, resistance welding, laser welding, and friction stir welding (FSW). The FSW is an energy efficient as well as a versatile method of metal joining, especially, light weight alloys. Recently, the research and development in this field and associated technologies have been developing rapidly worldwide. Although FSW is as a solid-state joining process which produces low-distortion welds of high quality, significant levels of residual stresses induced in the weld during fabrication of joint which influence the performance of the weld joint. The post-weld heat treatment is an effective way to eliminate such residual stress and to restore the properties and improve the performance of the joint.In this review article, the basic principle of post weld heat treatment (PWHT) and several aspects associated withPWHT of magnesium alloys have been described. In spite of this, much remains to be knowledgeable about the Mg alloys, PWHT process and opportunities for further research are identified Keywords - Post Weld Heat Treatment;Friction Stir Welding; Residual Stress; Microstructure; Aging; Mg Alloy