Pantnagar Journal of Research

Abstract

This work aims to study the role of friction stir welding parameters and their effect on the microstructure behavior of weld joint. Due to differences in mechanical, physical, chemical, and metallurgical properties, etc. it is difficult to join dissimilar metals. Sometimes this is not possible to join dissimilar metals by other methods. This type of problem can be solved by using friction stir welding. Friction stir welding reduces the presence of distortions, residual stresses, defects like porosity, shrinkage, cracking etc. Properties of friction stir welded joints are nearer to the properties of parent metal because friction stir welding is performed below the melting temperature. That makes friction stir welding process suitable for dissimilar metals and various applications. The quality of FSW joint is mainly depends on selection of FSW parameters. The study of the microstructure of FSW joint helps in understanding the flow of plastically deformed material, grain structure, grain size, the bonding between the grains and to analyze the cause of various defects formed during the process.