In the present research Al7075 alloy with 1, 3 and 5 varying weight percentages of flyash, 1, 2 and 3 varying wt.% of red mud along with constant 4 wt.% of mica particles composites were synthesized by stir casting technique. Thus prepared Al7075 alloy composites were subjected to the microstructural characterization using SEM and EDS. Mechanical properties were evaluated to know the impact of multi micro particles addition on the hardness, ultimate strength, yield strength, and ductility behavior of Al7075 alloy composites. Further, wear behavior of the prepared Al7075 alloy with mica, flyash and redmud composites were experimented using pin-on-disc apparatus by varying normal load and sliding velocity at constant 3000 m sliding distance. The improved mechanical properties were observed with the addition of micro scaled flyash, redmud and mica particles, further improvement was attained with the increasing weight percentage of flyash and red mud in the Al7075 matrix alloy. However, there was decrease in the ductility of the composites with an incorporation of hard micro particles in the soft Al matrix. Fractography and worn surface analysis were carried out to know the influence of micro particles on the tensile failure and wear surfaces of the composites.
In the current experimental study, the synthesis of biodiesel was acquired from mixed pongamia & mahua crude oil (50:50% v/v) with catalyst mixture of 1.5 g K 2 CO 3 in 0.75 g of NH 4 OH through transesterification method. The effect of diesel, biodiesel, binary blend (B20) and ternary blends of diesel with mixed pongamia & mahua biodiesel and alcohol (ethanol and heptanol) of (B20H10, B20H20, B20E10 and B20E20) fuel samples on CI engine was used to determine engine performance, combustion and emission characteristics at different loading conditions. From the experimental assessment, it was observed that heptanol blended test sample such as (B20H20) has improved thermal efficiency with decreased specific fuel consumption. Furthermore, significant enhancement in prolonged ignition delay causes to generate higher in-cylinder pressure and heat release rate when compared to other binary and ternary samples. The emission parameters like CO, HC and smoke opacity were reduced with slight increase in NOx at operating loads for all tested ternary samples when compared to diesel fuel. Alcohol blended ternary fuel samples caused to reduce CO 2 formation according to B20 and B100 fuel but slightly greater than diesel. It is worthwhile to conclude that the prepared B20H20 fuel is a distinguished alternative ternary blend sample preferably than pure biodiesel and binary test sample into CI engine without any engine modification as it satisfies with the diesel performance and to combat global warming.
In the present situation, there is always a unremitting requirement for the weight and cost effective product designs to remain competitive all time, synthesis of composite materials and its improved material properties is always remained as best practical solution to convince market demand. In metallic materials, aluminum alloy is most preferred for research and development activities for its low density, economical, ease of accessibility and production, good interfacial bonding with reinforcements [1].The combination of one or more materials, with one being with matrix phase (Al, Zn, Mg, Ti etc) and other being reinforcement phase (SiC, B 4 C, TiC, Gr, Al203, etc.), the two phases having different physical properties are combined by different processing techniques to form a new material known as composites with improved mechanical and physical properties [2−4].
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