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High strength and low weight materials are highly demanded in today’s automotive, aerospace, marine, medical, military, and agricultural equipment applications. Using composite materials is the best approach to increase high-strength and low-weight materials. This study focuses on evaluating the density, micro hardness, tensile, and wear behaviors of C355 aluminum alloy hybrid nanocomposites added in nanosized Graphene Oxide (GO) and Bio Silica (BS). These reinforcements are sourced from waste materials such as Thunder Coconut Shell (TCS) and Napier Grass (NG). The three different C355 aluminum alloy composites that have been improved by graphene oxide and bio-silica nanoparticles have been made utilizing the very traditional stir casting process. The percentage of GO and BS nanosized reinforcements is varied from 3wt.%, and 6wt.%. The cast composites density, hardness, and tensile strength are assessed. Unidirectional friction and wear tests are performed for each composition under six different loading conditions, ranging up to 60N, while maintaining a sliding speed of 5m/s. The worn surfaces and composite components underwent additional scrutiny through SEM analysis. By adding 6wt.% more GO/BS nanoreinforcement to the C355 Al alloy nanocomposite, the study’s findings show that the nanocomposite has almost 52.42% more tensile strength and 27.26% higher hardness than the basic alloy.

In this investigation, Ti6Al4V was used as the base material for the shot peening process. Three major influencing parameters such as peening time, peening distance, and peening pressure were examined. The substrate was shot peened with stainless steel shot, with an average diameter of 0.6mm. The process parameters were optimized using the statistical tool Response Surface Methodology. A three-factor, five-level composite design matrix was employed to minimize the number of trial runs. The effect of shot peening parameters on hardness, surface roughness, and coefficient of friction was optimized. The adequacy of the model was checked using an analysis of variance. From the test results, it was observed that the peening performed with a shot peening time of 20s, a peening distance of 100mm, and a peening pressure of 3 bar resulted in a higher hardness of 433 VHN, a surface roughness of 5.8, and a coefficient of friction of 0.22. This may be attributed to the optimal residual compressive strength achieved through the shot peening process.