International Journal of Innovative Research and Development

Abstract

In the present investigation, the wear characteristics of Al6061/SiC+Frit hybrid metal matrix composites fabricated by a stir casting technique by varying the reinforcement content from 0 wt. % to 6 wt.% in steps of 2 wt.% and keeping the SiC reinforcement constant of 6 wt.%. The adhesive wear behavior of hybrid composite was studied by using dry sliding pin on disc machine. The wear surface of the composite material was examined using the scanning electronic microscope. The result shows that the density, wear rate and co-efficient of friction decreases by increasing in weight percentage of reinforcements.

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 Aluminum metal matrix composites are the economical choice for wide variety of mechanical applications. Its cost effectiveness and light weight characteristics make it a popular grade of material. Aluminium composites have better advantages such as good strength, high specific stiffness, wear resistance, low thermal expansion, creep resistance, and good corrosion resistance. In this investigation, Al/frit and Al/ beryl composites were fabricated by liquid metallurgy route by varying percentage of reinforcements from 0 wt.% to 6 wt.% in steps of 2. The microstructural studies have been carried out to know the distribution of reinforcement particulates in the matrix material. The Brinell hardness and tensile tests were conducted on both as-cast and its composites. The results reveal that as the reinforcement particulate content increases there were significant increase in the hardness, ultimate tensile strength, young's modulus and decrease in ductility.

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The Cycle-by-Cycle fluctuation is the major phenomenon observed in Spark ignited internal combustion engine, which limits the range of operating condition. The parameters affecting cycle-by-cycle fluctuation have been identified as Mixture Distribution, Mixture Homogeneity, Spark Intensity, Spark Timing, Spark Plug Location, Spark Plug Gap, Number of Spark Plugs, Swirl, Combustion Chamber Geometry, Compression Ratio, Equivalence Ratio, Load & Speed. It has not been possible to clearly pinpoint on each of these parameters & degree to which they effect on cycle-by-cycle fluctuations. The cycle-by-cycle fluctuations in the engine reduces the power output, increases the engine roughness and emissions. The cycle-by-cycle fluctuation in SI engine has increased the attention to steady one of the parameter like the effect of Spark Gap on CBC fluctuation. The Experimentation is carried out on Four Stroke Single Cylinder Computerized Spark Ignition Engine. The results indicate the best operating spark plug gap which will results in minimizing the cycle-by-cycle fluctuations and the engine performance is improved with better drivability.

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The optimization of design parameters is the important step in the Taguchi Method which uses the orthogonal array to maximize the effect of controllable parameters and to minimize the effect of uncontrollable process parameters. This study presents the optimum design parameters on heat transfer coefficient of flow condensation in the pipe using Taguchi method. The investigation was carried out to optimize the heat transfer coefficient (h) for flow condensation. The three factors were considered: Diameter (d), Pressure (P), Mass flux (G) at three different levels. The L9 orthogonal array was selected and the best optimum conditions were identified based on Signal to Noise (S/N) ratio under the characteristic of larger is the best. The results showed Mass flux contribution is more on heat transfer coefficient. 

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The optimization of process parameters is the important step in the Taguchi Method which uses the orthogonal array to maximize the effect of controllable parameters and to minimize the effect of uncontrollable process parameters. In this study, the influence of wear parameters like grain size, applied load, wt.% of reinforcement and sliding distance on the abrasive wear of Aluminium/Beryl composites. Sand abrasive wear tests were conducted experimentally using the abrasive wear tester. An L₂₇ orthogonal array, signal-to-noise ratio and ANOVA were employed to investigate the wear behavior of Aluminium/Beryl composites. The objective is to establish a mathematical correlation between abrasive wear of Aluminium and its composites with wear parameters using multiple linear regressions model. 

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