Cogent Engineering (Dec 2024)
Experimental investigation on mechanical and tribological behavior features of gr/B4C reinforced AA7075 alloy matrix using induction stir casting
Abstract
Metal Matrix Composites (MMCs) and Hybrid Metal Matrix Composites (HMMCs) are advanced materials that possess distinctive mechanical properties, rendering them well-suited for a wide range of industrial applications. Nevertheless, the mechanical properties of MMCs and HMMCs can be further improved by optimizing their compositions and production routes. MMCs and HMMCs possess distinct mechanical characteristics, however their processing and production present various obstacles. However, the current processing and manufacturing methods for MMCs and HMMCs have limitations such as high production costs, limited design flexibility, and reduced mechanical properties. Therefore, the problem that needs to be addressed is the development of efficient and cost-effective processing and manufacturing methods that can improve the mechanical properties of MMCs and HMMCs while maintaining their unique properties. Therefore, this study conducted an experimental study on the mechanical and tribological features of HMMCs, where graphite powder and Boron Carbide were used as reinforcements, and AA7075 was used as the matrix. Induction stir casting was used to prepare the composite samples with different wt. % of reinforcements. Here, the Yield Strength (YS), Ultimate Tensile Strength (UTS), elongation, hardness, impact, and wear rate are used as output response characteristics. From the obtained results, YS, UTS, and elongation were enhanced by +85.31%, +88.24%, and -63.75%, respectively, while the hardness and impact strength was improved by approximately 18% and 110%, respectively, with the reinforcement of Gr/B4C as compared to unreinforced AA7075. Finally, the findings of this study could potentially aid in advancement of novel and enhanced hybrid composites for diverse applications.
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