The present study is focused on studying the effect of alkali treatment on the mechanical properties of banana fiber-reinforced epoxy composites. Four batches of samples were prepared with respect to the percentage of sodium hydroxide (NaOH) in the treatment solution (0%, 2.5%, 4.5%, and 6.5%). Later mechanical tests such as tensile, compressive, and interlaminar shear tests were conducted on the prepared composite specimens to determine the influence of alkali treatment on the mechanical characteristics. The test results indicate an overall improvement in all the mechanical properties due to the fiber treatment. Moreover, the samples made from the fiber treated with 4.5% of NaOH solution indicated the highest tensile strength and compressive strength, with an overall increment of 24.2% and 34.8% in tensile and compressive strengths, respectively, when compared with the untreated sample. A linear increment in interlaminar strength is observed with a maximum value of 25.4 N/mm2 for the sample made from the fiber treated with 6.5% of NaOH solution. This increase is due to the fiber flattening process which increases the bonding surface at the interface.
Aluminium, Magnesium and its alloys are preferred wheneverweight reduction is needed without compromising its strength. Both alloys have been used in numerous fields like in aerospace, defence field, automobile wheeling parts and also, they have been used in Medical field because of their biodegradability. In this study, Statistical investigation on surface roughness in Electric discharge machining of aluminium and Magnesium using Taguchi optimization Technique has been reported. Electric discharge machining was carried out under the condition of Current (5, 10, 15 A), Voltage (50, 55, 60 V), Pulse On time (10, 20, 30 µs) and constant flushing pressure of 0.50 Kg/sq.cm. Twenty-seven Experiments are carried out based on L27 orthogonal array. After machining the surface roughness (Ra, Rq, Rz) of the machined surface is measured using SURFTESTSJ-210. Optimizations of the results were done by Taguchi technique and the optimal parameters for the machining operation of aluminium and magnesium are determined. It is found that for Ra, Rq and Rz the most influencing factor is Current followed by the pulse on time, pressure and voltage.
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