Investigations on production and Characterization of surface Modified cuni composite using Friction stir processing

Abstract

Surface modification of engineering materials is a continuously progressing field of current research. It involves mechanical, chemical, thermal, and electrical based processing of materials to meet the final produc requirements. In particular, the metals and alloys are in need of thermal and mechanical based surface modification process based on its applications; mainly in the case of components which get exposed to wear and tear. Some of the processes are in need of pre and post processing for carrying out surface modifications. On other hand, some of the process like thermal spray, electro electroless processes for the surface modification have to be quantified for adhesion and delamination effect. To overcome the above said issues, mechanical surface modification offers a promising solution for improving/developing wear resistant engineering components. Most of the researchers adopted liquid state processing (Plasma arc surface alloying, Laser surface processing, and Electron beam irradiation) and solid state processing (Ball collision). The above said techniques involve high temperature during processing which leads to the formation of certain undesirable phases caused by chemical reactions between the incorporated particles and matrix metal. Thickness of the coatings developed through the above said properties is limited to a very few micrometres and at the same time the inhomogeneous distribution of reinforced particles also significantly affects the required properties. Difficulties involved in liquid phase technique have led to the evolution of solid state processing approach. An emerging technique called Friction Stir Processing (FSP) has been developed based newline