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Increased demand of advanced material like B 4 C DRMM Al composite due to its excellent mechanical, thermal properties puts the pressure on manufacturing sector because of its machining complication. In this research study, the B 4 C reinforced Al composite with 15% volume fraction has been developed with stir casting route. Micro holes ranging from diameter 0.38mm have been made over the composite specimen of thickness 0.4 & 0.5mm for which Micro Electro chemical Machine was employed. Totally nine experiments were conducted based on L9 orthogonal array emphasized by Taguchi's technique and the optimum levels were predicted based on the average S/N graph method. During the experiments frequency, voltage, current and electrolytic concentration were considered as the process variables, thereby considering the machining time as the response variable. Additionally, the analysis of variance (ANOVA) has been applied to determine the most significant factor to influence the response. In order to enhance the degree of validation, unconventional optimization tool of fuzzy logic was also employed to compare the results of the optimized model. Results of fuzzy logic and Taguchi's method were deviate in zero tolerance.Click here and insert your abstract text.

The present work aimed to analyze the roll of carbon nano tubes and graphene nano fillers on the mechanical and thermal characteristics of hollow glass microsphere reinforced epoxy composites. Composites with varying content of hollow glass microballoons (2, 4, 6, 8, and 10 wt %) reinforced in epoxy matrix were fabricated. Additionally, two more types of composites, one with graphene nano fillers and the other with carbon nano tube at a constant 0.5 wt %, were fabricated with varying weight percentages of hollow glass microballoons (2, 4, 6, 8, and 10%). The composites were fabricated using an open mold casting process. Composites were tested for thermal and mechanical properties. The tensile and flexural moduli were found to rise as the HGM concentration increased. Graphene-filled HGM/epoxy composites revealed the highest modulus compared with HGM/epoxy and HGM/CNT/epoxy composites. The impact strength of all composite types decreased as the HGM content increased. Neat epoxy specimens revealed low response as compared with all the composites tested. Further, the thermal conductivity of HGM/epoxy composites was lower as compared with other compositions and neat epoxy. Scanning electron microscopy was used to analyze the surface morphological behavior of the composites subjected to flexural test. It was found that HGM/G/E composites with 10% of HGM and 0.5% of graphene by weight in epoxy matrix were the optimum.