Faculty Publications
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Item Effects of Addition of Graphite on the Tribological Behaviour of Al7075-SiC Hybrid Composites Using Design of Experiments(Springer Science and Business Media Deutschland GmbH, 2024) Gudipalli, K.R.V.; Chapke, Y.; Hareesha, H.; Doddamani, S.Despite the widespread use of Al7075-SiC composites in various engineering applications, their tribological performance remains a subject of interest due to challenges related to friction and wear. This study addresses the need for improved lubrication in such composites by investigating the potential of Al7075-SiC/Graphite hybrid materials. The incorporation of graphite particles, up to 9% by weight, aims to enhance the self-lubricating properties of these composites. Stir casting is employed to fabricate specimens with varying graphite content (3–9% by weight), followed by comprehensive tribological assessments under dry sliding conditions. Factors including sliding distance, load, and graphite composition are systematically evaluated using Taguchi’s optimization techniques, including design of experiments, ANOVA, and regression analyses. Results reveal that the addition of 9% graphite content notably reduces both the coefficient of friction and wear rate. According to the data, sliding distance significantly impacts wear behaviour, followed by the applied load. In contrast, the composition has a 77% impact on the coefficient of friction than load, while the sliding distance has a relatively small impact. As a result, the Al7075-SiC/Graphite composite material demonstrated its suitability as a self-lubricating substance. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.Item Seashell-based filler as sustainable reinforcement: a novel approach to enhance wear performance of bamboo-epoxy composites(Institute of Physics, 2025) Anand, K.J.; Murthy, A.G.S.; Ekbote, T.; Doddamani, S.; Madhusudhana, H.K.; Patil, A.S.Seashell wastes are discarded in landfills, causing environmental problem. This study presents a novel approach to valorize seashell waste by converting them into filler particulates and incorporate it into bamboo–epoxy composites. Composites of varying clamshell filler (0–9 wt%) loading were prepared using compression molding method. The wear behavior of composites was studied under dry sliding conditions on a pin-on-disc tribometer following ASTM G99 standard. Taguchi-ANOVA method was employed for statistical analysis of results and to identify the significant factors affecting wear rate. The results showed that adding seashell particles improved the hardness and wear resistance of the bamboo composites. ANOVA results indicated that load has the maximum effect of 47.4% and speed has the effect of 29.4%. Optimal performance was achieved for 6 wt% filler addition, exhibiting 17% improvement in hardness and wear rate was reduced by 60%. The enhancement in wear resistance of bamboo composite was correlated with an increase in hardness and a decrease in damage to the impact surface, as observed in SEM micrographs. These findings establish clamshell filler as an effective reinforcement for improving wear performance of bamboo composites. © 2025 IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.