A REVIEW ON THE EFFECT OF INTERLAYER ON FRICTION STIR WELDING OF SIMILAR AND DISSIMILAR MATERIALS

The joining of dissimilar material is often difficult due to difference in physical properties and composition and hence use of interlayer in FSW helps in effective joining. Use of interlayer between the plates not only enhances the tensile strength of the weld joint but also impedes the formation of hard and brittle intermetallic compounds (IMCs) and leads to controlled formation of fine and uniformly distribution of IMCs and reduces the residual stresses and further increases the joint efficiency. This work contains the review of some important research papers on FSW using interlayer for similar material i.e., Al/Cu/Al and for dissimilar material Al/Zn/Mg. The work also focuses on review of the tool material that can be used for different workpiece material in order to get optimum results and also throws light upon the fractural analysis of the weld joint. The effect of process parameters (tool rotation, transverse speed, tool tilt angle) on the joining of materials by FSW has been discussed along with the suggestions of the researchers.