Vinay Singh

Optimization of Parameters Using Conductive Powder in Dielectric for EDM of Super Co 605 with Multiple Quality Characteristics

Experiments were performed using conductive powder-mixed dielectric in electrical discharge machining of Super Co 605 and optimization is carried out by means of Taguchi method. The process input parameters selected are flushing pressure, discharge voltage, pulse on-time, polarity, peak current, and pulse off-time to study the performance characteristics in the form of surface roughness, tool wear, and material removal rate. Experiments based on appropriate orthogonal array are conducted and significant parameters are identified. The optimum process conditions simultaneously leading to a better surface roughness, lower tool wear, and higher material removal rate are then demonstrated by confirmation testing. The experimental results confirm an improvement in surface roughness, tool wear, and material removal rate when Taguchi method is used.

Fluoride in irrigation waters of Agra district, Uttar Pradesh

Abstract Underground waters of the semi-arid tract of Agra were examined for their F concentration and other chemical constituents. The F concentration in waters varied from 0.2 to 3.2 mg l −1 and 56% of the waters contained injurious concentration of F for drinking water. However, these waters were not harmful for most crops with respect to F concentration. Fluoride concentration was not correlated with EC, B and Na concentration of groundwaters.