INVESTIGATION OF SURFACE MODIFICATION OF ALUMINIUM ALLOY USING B4C THROUGH FRICTION STIR PROCESSING

Abstract

Surface modification is the process of enhancing surface properties either through physical, chemical and biological effects in order to achieve superior surface quality. In this dissertation, initially the aluminium composite is prepared using reinforcement of Boron Carbide nanoparticle which is inserted in a groove prepared on the specimen (AA5083 plate). Then, design matrix is generated using central composite design in response surface methodology. Further, the prepared specimens are taken to the FSP machine where experimentation is performed with regard to above designed matrix. Furthermore, the specimens are then taken for various tests including UTS, YS, % Elongation and finally to Vickers Hardness Testing Machine respectively. Results are noted and taken to ANOVA for checking the feasibility of the designed model. It is discovered that, p values for various responses were less than 0.05 which indicates that model is significant while lack of fit is maintained insignificant. Eventually, for obtaining the optimum values for various responses, F ratio was taken in order to investigate the dominating parameters. Finally conclusion were drawn which reveals that raising the TRS and Number of passes while dropping the TTS promotes better results.