For future generation, to keep the world green, the cognizance on natural fiber increases. The natural fiber-reinforced composites have an advantage of being lightweight, renewable, biodegradable, and cheap, eco-friendly. So there is a need to investigate the potential of natural fibers and their composites, which can be used in highly demanding situations. An attempt has been made in present work to explore the possible use of a variety of wild grown fibers in nature in the development of new composites for load carrying structures. This article is detailed about the extraction process of natural fibers and characterization of natural fiber-reinforced composites. The reinforced composites made by the use of Tamarindus Indica (Tamarind) fibers with epoxy and bisphenol resin. The experimental investigations of the natural fiber composites were carried out by means of Scanning Electron Microscope and the mechanical properties such as tensile, flexural, compression and hardness properties of the composites without chemically treated fibers were reported.
In this present study, optimization of drilling parameters in hybrid Al-6061/SiC/B 4 C/talc composites was studied using grey relational analysis. The purpose of this research was the investigation of the effect of drilling parameters on Al6061/SiC/ B 4 C/talc composites fabricated using the stir casting. These hybrid composites containing talc (solid lubricant) particles reduce thrust force, circularity and surface roughness. In drilling, experiments were done based on the Taguchi L 27 orthogonal array method on hybrid Al6061/SiC/B 4 C/talc composites with HSS drill bits of diameter 6 mm, 7 mm and 8 mm used in dry condition. ANOVA examined the effect of various drilling input parameters like cutting speed, feed, depth of cut and percentage of reinforcement on output parameters like thrust force, surface roughness and circularity. Grey relational analysis equations were utilized for finding the optimum machining condition. The most important parameter, namely the cutting speed, was found to have influenced the thrust force, circularity and surface roughness on the drilling of hybrid Al6061/ SiC/B 4 C/talc composites.
Engineering industries are currently using many tool materials such as ceramic,carbide, high speed steel, Cubic Boron nitride and diamond. In most of the small scale industries, the lathe machines are consuming High Speed Steel (HSS) Tool. The HSS tools are easily available and cheapest one. In this present investigation, the Tungsten HSS Single point cutting tool was taken as substrate material. Two substrate HSS Tools were coated with two different combinations of TiAlN composite material using Physical Vapour Deposition coating technique. The surface roughness and hardness were determined for the tools in same condition. The tools were used in lathe machine in same operating condition. The weights of the tools were checked using standard equipment after each machining trials. The loss of tool weight for each trial was determined and the percentage of weight loss was calculated. The life of the Titanium Aluminium Nitride (Ti 70% , Al 25%) coated tool increased by 3.74 times than uncoated tool. The life of the Titanium Aluminium Nitride (Ti 55% , Al 35%) is increased by 2.71 times than uncoated HSS tool.
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