X ray diffraction, thermogravimetric analysis, scanning electron microscopy and energy disper sive spectroscopy studies were performed with molding sand and sugar industry fly ash to evaluate and com pare their physical properties. We noted that several physical properties of sugar industry fly ash and molding sand were similar. We then tested the permeability, green compression strength and dry compression strength of various compositions of sugar industry fly ash and bentonite to explore their potential as an alternative to molding sand, thereby reducing the dependency on the latter, as well as to suggest an effective way for disposal of fly ash from sugar industry. We also found that quality aluminium castings could be produced using fly ash, which effectively replaced 24% of molding sand in the foundry, thereby reducing the cost of production and increasing the surface finish of castings.
In this work, Cladding was done on SS316L alloy through the CMT process using Stellite-6 filler wire. 31 experiments were done at different welding conditions as per CCD matrix. The cladding specimens were characterized by macro and micro-study, Vickers microhardness evaluation and corrosion resistance analysis. An optical microscope, SEM-EDAX, and XRD were used to predict the structural characterizations, presence and the distributions of the elements. Based on the study higher voltage & welding speed showed appreciable hardness at the interface & cladding regions. The thickness of the interface was noted at a maximum of 190 μm. The EDS spectra showed that Fe, Cr and Co were the major elements in the clad and interface regions. The Co-rich phase and the low content of element O are found in the low corroded regions on the specimen. The maximum hardness observed at cladding and interface were 378 Hv and 270 Hv respectively.
In this paper , the parameters of Electrical Discharge Machine (EDM) are investigated during the machining of Inconel 718 by using different sizes of circular Aluminum electrode. Demand for better surface finishes are increasing recently for all materials, the low rigidity and high material removal rate of Inconel alloys offers a challenging task in obtaining better Surface Finish. The analysis of surface characteristics like Surface Roughness (SR) of Inconel 718 material is carried out an excellent surface finish can be obtained by setting the machining parameters at optimum level. Experimentation was carried out by using Taguchi’s L9 orthogonal array under different conditions of parameters. The response of SR is considered for improving the machining efficiency. Optimal combination of parameters was obtained Taguchi Optimization technique. The confirmation experiments results shows that the significant improvement in Surface Finish was obtained. ANOVA have been used to analyze the contribution of individual parameters on Surface Roughness. The experimental result demonstrates that the Taguchi method satisfies the practical requirements.
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