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The usage of AZ91E series magnesium alloy material increases in the field of automobile, aerospace and structural applications because of its enhanced mechanical properties, light weight and good machinability characteristics. The present investigation is to optimize the drilling process parameters of magnesium alloy (AZ91E) hybrid nano composite consisting of chopped basalt fiber (9wt%) and SiCp (7.5wt%) fabricated by vacuum stirring technique. AZ91E hybrid nano composite is drilled by M-Tab vertical machining centre equipped with CNC under dry state (without coolant). The dry state drilling operation was performed by HSS tool with varied input parameters like drill diameter (6mm, 8mm, 10mm and 12mm), spindle speed (200rpm, 300rpm 400rpm 500rpm), feed rate (5mm/min, 10mm/min, 15 mm/min, 20 mm/min) with constant depth of cut (15mm).

Self- assembled ZnO nanostructures were synthesized by a simple, rapid and cost- effective emulsion combustion method. The synthesized ZnO nanostructures have a hexagonal wurtzite structure. TEM micrographs of the sample consisted of looped chains that were <1 μm in length and consisted of 30-120 isometric 13-16 nm sized nanoparticles. The assembling of nanoparticles transforms from branched chain to linear network by increasing the molar concentration of oleic acid from 0.5 to 1.5. The linear network was <700 nm in length and width varies from 15-35 nm respectively. The oleic acid bonding with ZnO was confirmed by Fourier transform infrared spectroscopy. The optical band gap (Eg) of 3.34, 3.38 and 3.43 eV based on the absorption edge 371, 367 and 361 nm respectively. Magnetization study reveals that the ZnO sample exhibits diamagnetic behavior.

In the present investigation silicon carbide nanoparticles reinforced magnesium alloy [AZ91E] composites were prepared by vacuum stir casting process in an inert atmosphere. Required amount of silicon carbide nanoparticles with grain size of 50nm was added into AZ91E molten melt with constant stir speed of 600 rpm and vacuum pressure of 1 lpm to obtain magnesium alloy composite containing 0, 5, 7.5 and 10 wt.% SiCp nanoparticles. The prepared composites were subjected to mechanical and microstructure studies. The mechanical properties were found to increase with the addition of silicon nanoparticles compared to unreinforced magnesium alloy. The maximum impact strength, yield strength and tensile strength were found to be 29.13J, 156 MPa and 401.13 MPa respectively. Microstructure studies reveal uniform distribution of silicon carbide in magnesium alloy matrix.

Zinc oxide semiconductor thin films are deposited on glass substrate at different RF magnetron sputtering parameters. The deposited films were characterized as a function of substrate - target distance, gas flow ratio, working pressure and RF power. X-ray diffraction, Field emission scanning electron microscopy, and hall measurement were utilized to analyze the effect of the deposition condition on the structure, surface morphology and electrical properties of ZnO thin films. The deposition conditions were optimized to give good quality films suitable for the application of flexible or invisible flat panel display. All the films were deposited at 100°C.

In the present experimental investigation magnesium based alloy was prepared by mixing magnesium powder and aluminium powder in the ratio 65:35. The prepared magnesium alloy is used as the matrix material. Metal matrix composites were prepared by stir casting route. The composite was prepared by reinforcing 50 nm alumina nanoparticle so that the final composite contains 5, 10 and 15 wt.% alumina. Mechanical properties such as tensile strength, yield strength, impact strength and hardness were evaluated. Significant improvement was observed in impact strength and hardness value. The result showed that magnesium alloy with 5 wt.% alumina nanoparticle has a maximum impact strength of 25.2 J and hardness value 63.86 Hv respectively. Tensile strength and yield strength shows marginal increase in value.

The utilization of unconventional machining methods such as electron beam machining, electrical discharge machinating, etc., have been increased in the manufacturing industry to create holes on the materials. In this paper, twist drill was used for drilling of Bahunia racemosa (BR)/ glass fiber composites and then the measurement of hole diameter error was analysed. The main objective was to establish a correlation between feed rate, cutting speed and drill tool with the induced hole diameter error in a composites. The drilling process was performed under various cutting speed, feed rates and different drilling tools with a point angle of 118°. A Coordinate measuring machine was used to examine the hole diameter error of drilling hole. Taguchi L9 (33) orthogonal array was used to determine the optimum levels of the parameters and analyze the effect of drilling parameters on hole diameter error.

Formula SAE is a prestigious engineering design competition, where student team design, fabricate and test their formula style race car, with the guidelines of the FSAE rulebook, according to which the car is designed, for example the engine must be a four-stroke, Otto-cycle piston engine with a displacement no greater than 710cc. According to FSAE 2017 Rule Book [1], ARTICLE 3, IC3.2 and IC3.3 state that the maximum sound level should not exceed 110 dBC at an average piston speed of 15:25 m/s (for the KTM 390 engine, which has 60 mm stroke length, the noise level will be measured at 7500 RPM) and 103 dBC at Idle RPM. So, the active muffler which works as a normal reflective muffler till the 7500 RPM range, after which an electronic controlled throttle mechanism is used to reduce the backpressure (since after 7500 RPM the noise level doesn't matter in FSAE) by using tach signal from the engine to control the throttle (two position).

To increase the range of a Battery Electric Vehicle (BEV), a lot of ideas have been proposed. A prominent one among them is the Battery swapping methodology or Rapid Battery Interchange (RBI), where standardized batteries can easily be removed from the BEV and replaced with recharged batteries quickly. The feasibility of this methodology has been highly debated and contested. This paper studies the feasibility of a very popular distribution and maintenance network currently used for LPG distribution in India, to be applied to battery distribution used across different makes and models of BEVs. In India, 33.6 million households subscribe to LPG Cylinders for domestic cooking usage. These standard sized (14.2Kg) cylinders are refilled and redistributed via multiple public sector and private companies.