INFLUENCES OF VARIOUS PROCESS PARAMETERS ON FRICTION STIR PROCESSING ZONE IN ALUMINIUM ALLOYS

Abstract

This paper presents a review of influence of process parameters on friction sir processing zone in aluminium alloys and suggesting a model for process parameters.Friction Stir processing is a process derived from friction welding whereby a coating material, in rod form is rotated under pressure, generating a plasticized layer in the rod at the interface with the substrate. By moving a substrate across the face of the rotating rod a plasticized layer between 0.2-2.5mm thick is deposited. The resulting composite material is created to provide the characteristics demanded by any given application. It is a technique for depositing many materials including tool steels, stainless steels and hard facings to improve the performance of an alloy. Friction Stir processing opens up a new area of repair and reclamation of worn and damaged components. Friction Stir processing form application of material to form a protection against wear and corrosion. Friction stir welding creates bonds through the combined effects of heat, deformation by a stirring action, and pressure using a non consumable tool that is translated along a joint line. Friction stir processing is a means to locally modify properties over depths or volumes that depend on the material being processed and the desired effect. Friction stir processing can dramatically refine grain structures producing improvements in a variety of properties. This review paper includes the influence of tool pin profile and tool shoulder diameter on the formation of friction stir processing zone, effect of tool position on the fatigue properties of dissimilar sheets joined by friction stir welding, Thermo-mechanical model with adaptive boundary conditions for friction stir welding.