Smart Innovations and Constructions 130 © MANTECH PUBLICATIONS 2021. All Rights Reserved Rotary Friction Welding and its Applications: An Overview Vishal Makvana 1 , Snehal Tirivedi 2 Department of Automobile Engineering 1 , Department of Mechanical Engineering 2 Parul University, Vadodara, Gujarat, India Email: vishal.makvana12645@paruluniversity.ac.in 1 , snehal.trivedi@paruluniversity.ac.in 2 DOI:- https://doi.org/10.47531/SIC.2022.15 Abstract Friction welding is the only till date known method to weld similar as well as dissimilar metals. It is an ordinarily used welding method in various industries like automobile, aeronautical, submarine and heavy-duty industries. Friction welding is a non- conventional force welding process. It is a well-thought-out, most viable alternative to overwhelmed the difficulties faced in conventional connection techniques. Mostly used for joining material with variable mechanical and physical properties. We have mostly been attentive to Rotary Friction Welding (RFW). Our main objective is to understand the fundamental understanding of Friction Welding. This method changes kinetic energy into heat energy, manufacturing high-quality weld with a strangely high- efficiency coefficient. Experimental tests demonstrate the efficiency of this rotational friction welding system by using various parameters like rotational speed, temperature, pressure on the material. Also, experiment on the mechanical strength of the similar and dissimilar material, its experimental determination in real-time is fundamental for understanding and characterised the main process step and optimisation of parameters. Keywords: - Friction Welding, Similar joint, Dissimilar Joint, Continuous-drive Friction Welding (CDFW), Rotary Friction Welding (RFW), Tensile strength, Hardness, Microstructure INTRODUCTION Rotary Friction welding (FRW) is a solid-state unique welding method that forms heat over and is done with mechanical friction between workpieces in relative motion to one another, with the addition of a sideways force called "upset" to dislocate and fuse the materials plastically. Because no melting occurs, friction welding is not a fusion welding process in the old-fashioned sense but more of a forge welding technique. Friction welding is hand-me-down with metals and thermoplastics in a wide variety of aviation and automotive applications. It provides excellent repeatability, high productivity, and low cost. Its greatest application is joining similar and