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Influence of Silicon Carbide on Microhardness and Corrosion Behavior of AZ91/SiC Surface Composites Processed through Friction Stir Processing: Multi-Response Optimization Using Taguchi-Grey Relational Analysis
Incorporating Silicon Carbides (SiC) particles as reinforcement has become a common practice to elevate surface properties and augment mechanical strength, wear, and corrosion resistance in various alloys. Friction stir processing (FSP) is a method employed in the solid state to produce surface composites and refine grains. The push for weight reduction in several industries, including those that need fuel-efficient automobiles, has increased demand for magnesium alloys. As a result, this study investigated the microstructure, microhardness, and resistance to corrosion in AZ91/SiC surface composites using FSP. Experiments used the Taguchi L9 array to optimize runs and examine how rotational speed (TRS), traverse speed (TTS), and volume of reinforcement (vol) impact multi-performance. Poor stirring parameters of 500 rpm and 60 mm/min at a higher SiC volume fraction (13vol) resulted in the lowest microhardness and corrosion resistance. Optical microscopy and FESEM confirmed the presence of SiC and their distribution. The current study utilized Taguchi and Grey Relational Analysis (GRA) to identify the optimal parameter settings for the â��Larger is the betterâ�� quality feature, revealing that the best settings for maximum multi-performance effect were TRS3 1500 rpm, TTS3 60 mm/min, and vol1 7. The analysis of variance revealed that the tool traverse speed was the most significant contributing parameter, followed by rotational speed and vol, to the dual output characteristics at 95 confidence. © 2023, The Author(s), under exclusive licence to Springer Nature B.V.
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