Abstract
Friction stir processing (FSP) is a unique method that facilitates the generation of frictional heat between the tool and the workpiece. Stir casted LM 25 aluminum alloy-10% SiCp Metal Matrix Composites (MMC) consists of large aggregated strengthened particles and cast item dendrites. In FSP, a non-consumable instrument made of harder material plays a crucial part in changing the substrate material's surface. In the present study, an attempt has been made to analyze the impact of different ratio of shoulder diameters to pin diameter (D/d) on the immersion corrosion conduct of the LM25AA processed friction stir – 10% SiCp MMCs. The size and dispersion of SiC particles in friction stir processed (FSPed) MMC were studied. The microhardness and tensile characteristics of the FSPed material were assessed and associated with the micro and macro structures. The influence of D/d ratio on the microstructure, micro-hardness, and corrosion rate was analyzed and observed that the hardness and rate of corrosion increase with the decrease in grain size of the matrix and SiC particles.
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