Experimental Investigation of Changes in Micro Structure of FSW in AA6061/Sic/Coconut Shell Ash MMC’s.

Abstract

Modern Metal Matrix Composites are made of getting much attraction in the automobile, aerospace applications. Research is going in an organic reinforcement material such as flyash, Rice husk and redmud. Coconut shell ash a natural material available very easily.Aluminium matrix composites (AMCs)6mm thick plates made with coconut shell ash (7.5 Wt%) and AA6061/SiC (10 Wt%) butts were Friction stir welded (FSW)utilised in this project. The characteristics of the specimens are examined with optical and scanning electron microscopes. The weld's microstructure displays specific sections, such as the zone impacted by heat (HAZ), the region affected by both thermal and mechanical factors (TMAZ), the original metal structure (BM or base metal), and the area where the material is transformed during welding (NZ or nugget zone).The nugget area displays a uniform dispersion of coconut ash and SiC particles. The rotational force from the Friction Stir Welding (FSW) tool causes the breakage of various grains found in the original Aluminum Matrix Composites (AMCs). The addition of ash from coconut shells particles successfully reduced the parent AMCs contain phases that resemble needles. The nugget zone is more difficult than the previous zones.