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Papers by lalit ranakoti

The aluminium matrix composites are classified as lightweight aluminium centric metal matrix comp... more The aluminium matrix composites are classified as lightweight aluminium centric metal matrix composites. It has dual properties of metal and ceramic materials. Now a days, monolithic metals and conventional alloys have been replaced by aluminium metal matrix composites in many applications in the field of automobile and aerospace due to high strength to weight ratio, fracture limit, toughness, wear and sustaining properties at the higher temperature. The paper thus deals with the fabrication of aluminium metal matrix composites with reinforcement of TiB 2 in varying percentage in aluminium alloy Al 1100 through the stir casting process. The mechanical and tribological properties were studied. The fabricated composite exhibited improved tensile strength and hardness whereas ductility reduced. The wear resistances of composites were found directly proportional to the weight percentages of TiB 2 in developed aluminium matrix composites.

Acta Innovations, Dec 16, 2021

Being a biodegradable polymer, poly(lactic acid) (PLA) based composites receive greater preferenc... more Being a biodegradable polymer, poly(lactic acid) (PLA) based composites receive greater preference over nonbiodegradable plastics. Poly(lactic acid) has to find its place in various applications such as polymer composites, agriculture, biomedical, etc. Polymer composites based on PLA possess comparable mechanical strength, endurance, flexibility and endures future opportunities. Several combinations of natural fibers and filler-based PLA composites have been fabricated and investigated for physical and mechanical changes. Moreover, several biopolymers and compatibilizers are added to PLA to provide rigidity. The paper presents a tabulated review of the various natural fiber/filter-based PLA composites and the preparation and outcomes. In addition, enhancement made by the reinforcement of nano filler in the PLA are also discussed in brief. The significance of PLA in the biomedical application has been discussed in brief. The paper also shed lights in the social and economic aspects of PLA.

Solar still is the emerging technique to distilled water at places where there is a huge scarcity... more Solar still is the emerging technique to distilled water at places where there is a huge scarcity of drinking water. The current investigation deals with the productivity enhancement of distilled yield of conventional solar still (CSS) to obtain decontaminated fresh water. Experiments were conducted by modifying CSS for five different cases viz: (a). Conventional solar still without the wick, (b). Conventional solar still with the tilted wick at 15˚, 30˚, and 45˚ (c). Black painted basin conventional solar still (BPBCSS) with the tilted wick at 30˚. All experiments were performed on the month of March for approximate same climatic condition. From the preliminary investigation, the flow rate of basin water on the wick was kept fixat 0.2g/m2.secin such a way that the wick remained completely wet. The overall daily productivity of the caseswas found to be 3.802kg/m2, 3.925kg/m2, 4.25kg/m2,4.102kg/m2, and 4.372 kg/m2 for CSS without the wick, CSS with the tilted wick at 15˚, CSS with th...

Materials Today: Proceedings, 2021

Abstract The work carried in the present study deals with the physical and mechanical characteriz... more Abstract The work carried in the present study deals with the physical and mechanical characterization of walnut filled-vinyl ester composite prepared by gravity die casting and centrifugal casting (functionally graded materials). Among the physical and mechanical properties, void content, hardness, flexural strength, and impact energy in the case of functionally graded materials (FGMs) are found to boost with the increase in filler content. In contrast, tensile strength was found to deteriorate for FGMs as compared to homogeneous and neat composites. Pin-on-disc (POD) machine was used to evluatethe sliding wear performance of the fabricated composites of both types under specific humidity and thermal conditions The overall result shows that the wear rate of FGM composites is comparatively lower than GDC composites.

Acta Innovations, Jul 12, 2022

With continuous miniaturization of modern electronic components, the need of better cooling devic... more With continuous miniaturization of modern electronic components, the need of better cooling devices also keeps on increasing. The improper thermal management of these devices not only hampers the efficiency but can also cause permanent damage. Among various techniques, microchannel heat sink has shown most favourable performance. To further enhance the performance, two techniques i.e., active and passive are used. In passive technique, no external power source is required like heat sink design alteration and working fluid modification. External power source is necessary for heat transfer augmentation in the microchannel heat sink when using the active approach. Due to compact size of microchannel, active techniques are not used more often. However, the present work highlights the different active technique used in microchannel i.e., Electrostatic forces, flow pulsation, magnetic field, acoustic effects, and vibration active techniques. Above mentioned techniques have been analysed in detail.

Energy, Environment, and Sustainability, 2019

This segment encompasses the tribological changes usher by the addition of various reinforcements... more This segment encompasses the tribological changes usher by the addition of various reinforcements to the aluminium metal matrix composite. Aluminium matrix composites (AMCs) are being successfully tailored to achieve certain mechanical properties for specific applications. AMCs can be called as advance engineering materials with excellent properties. High hardness, high thermal conductivity, good yielding strength, strength to weight ratio, low coefficient of thermal expansion and excellent wear resistance are some of the attractive properties which AMCs possess. Applications like automobile, aerospace and several other industrial applications are being attracted towards AMCs due to its qualities. Various reinforcements are available in the market which can be added to aluminium metal to further enhance its properties. Particularly, in the field of tribology, these reinforcements have proved their worth in AMCs. To examine the effects of various reinforcements, a comprehensive study has been reported in the field of tribology for AMCs.

Polymers, Jun 27, 2022

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

De Gruyter eBooks, Feb 6, 2023

CRC Press eBooks, Jul 13, 2021

Materials Today: Proceedings, 2021

Aim of the study is to use natural and synthetic fibers to fabricate a prosthetic limb. Conventio... more Aim of the study is to use natural and synthetic fibers to fabricate a prosthetic limb. Conventionally, natural fibers are not used for prosthesis. However, synthetic fibers such as Carbon fiber, Kevlar fiber and the Glass fiberare extensively in use as reinforcement in the manufacturing of prosthesis. In this paper the influence of different resin on physico-mechanical properties of hybrid fiber reinforced polymer composites were observed.Composites for prosthetic limb were manufactured with constant 5 wt% glass fiberhybridised with varied jute and grewiaoptiva loading (2.5 wt%, 5 wt% and 7.5 wt% each) reinforced based epoxy, vinyl ester and polyester matrix.Results show that the strength and hardness get improved as the ratio of natural fiber increases.The highest tensile, flexural,were obtained forepoxy-basedhybrid composite at 7.5 wt%, vinylester based hybrid composite at 5 wt% samples E3, V2, E3 and E2 respectively. In addition, both Impact energy and hardness were observed to be maximum for epoxy based hybrid composites at 7.5 wt% and 5 wt% respectively. Results also reveal that 5 wt% glass fiber (fixed), 10 wt% natural fibre with epoxy is the best composition among fabricated samples followed by the vinyl ester composite ofthe same composition. As evidence, TOPSIS results also convey the best composition among the fabricated composites.