Tribological Behaviour of Neem Oil with and without Graphene Nanoplatelets Using Four-Ball Tester

Hemanth, G.; Rakesh, A.; Adarsh, K. M.

doi:10.1155/2020/1984931

Cited by 30 publications

(15 citation statements)

References 61 publications

(64 reference statements)

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“…In the author's previous works, the base pongamia, mahua, and neem oils were studied and compared with standard lubricating oil SAE 20W40. Pongamia and Neem oils showed better wear prevention behavior with HNTs and GNPs respectively [16,17]. Also, when the evaluation of GNPs inculcated Mahua oil was done for WPC, 0.25GMO sample showed supreme wear preventive behavior concerning other GNPs blended Mahua oil samples [32].…”

Section: Introductionmentioning

confidence: 92%

“…Further, inculcation of halloysite nanotubes(1.5 wt.%) with pongamia oil resulted in a smoother wear scar [16]. Suresha et al in another article studied the wear preventive and EPC of neem oil [17]. Shahabuddin et al have blended the jatrophabased lubricating oil in the synthetic oil in various percentages and found a 10% blend was portrayed to show the lower friction of 34% and wear by 29% [18].…”

Section: Introductionmentioning

confidence: 99%

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Tribological characteristics of mahua oil with graphene nanoplatelets as anti-wear and extreme pressure additive

Hemanth¹,

Padmanabha²,

Prasanna³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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The tribological investigation was performed to seek the role of graphene nanoplatelets (GNPs) in enhancing the physico-tribological properties of mahua oil. The flashpoint, fire point, viscosity, wear preventive characteristics (WPC) and extreme pressure characteristics (EPC) were conducted following the governing standards. A substantial decrement of 17% in the coefficient of friction, 15.15% in wear scar diameter was observed upon blending the 0.25 wt.% GNPs with mahua oil. The WPC morphology on the steel balls portrayed the micro tracks. The EPC investigation presented 1 wt. % GNPs blended mahua oil with the augmented outcome of 7.7% and this was portrayed to be the best GNPs loading in weld load perspective. However, at 0.1 wt.% of GNPs loading was identified as the best loading with a wear point of view. The morphology of EPC revealed severe abrasion and steel balls were exposed to very high temperatures and have undergone metal squeeze out from the contact surface. This article also discusses the different wear regimes and corresponding wear phenomena in four-ball tribology testing with the aid of micrographs. RECEIVED

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Tribological characteristics of mahua oil with graphene nanoplatelets as anti-wear and extreme pressure additive

Hemanth¹,

Padmanabha²,

Prasanna³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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“…Cutting speed of 800 rpm, feed rate of 0.04 mm rev −1 , depth of cut 0.5 mm, nose radius of 1 mm and negative rake angle of 15 0 were obtained as the optimal values. Suresha et al [10] studied on how neem's viscosity, wear-prevention, and extreme pressure properties could be improved. Neem's viscosity is decreased with rise in temperature and also graphene nano-platelets (GNP) loading up to a range of 0.25 to 1.0 weight percent.…”

Section: Literature Reviewmentioning

confidence: 99%

Optimization of responses in single and multi-point machining processes using Dragon-fly algorithm coupled with TOPSIS and VIKOR decision-making approaches

Ramena,

Arun Vikram,

Maruvada

et al. 2024

Eng. Res. Express

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Due to complex production practices, it is becoming crucial to provide greater thermal management and friction reduction in manufacturing processes. Lubricants play a crucial role by effectively reducing friction, minimizing wear and tear thereby extending the lifespan of the tool. It is observed that there is a shortage of studies associated with the machining of hard materials like Ti-6Al-4V. The present work has therefore focused on the machining of high-grade Titanium alloy under dry and Neem oil aerosol-mist spray wet conditions. The machining is performed on two kinds of machining processes, such as plain facing with single point tool and co-axial turn-mill facing with multi-point cutting tools on computer numerical controlled Turn-mill machine tool. Furthermore, there are very few articles reported on usage of Neem oil (AzadirachtaIndicaL.) as a lubricant. This has motivated the authors to use Neem oil in a mist condition to minimize the quantity of coolant, without compromising on the tool temperature, surface quality, and tool-wear. The responses obtained are subjected to regression analysis to evolve the fitness functions. Multi-objective optimization of these functions is than adopted using Dragon-fly algorithm (MODA) under the constraints of the machining parameters. A set of Pareto optimal solutions for each of the machining cases are obtained and are further evaluated using TOPSIS and VIKOR decision-making approaches to achieve the optimal values of the cutting parameters. The optimum parameters for single point cutting under wet conditions were observed as speed (592 rpm), feed (0.058 mm/rev) and depth of cut (1.00 mm).The corresponding values of responses were tool temperature (37.05 oC), surface roughness (0.128 μm) and tool wear (155.19 μm). The equivalent values for multi-point cutting were determined as 510 rpm, 0.086 mm/rev and 0.25 mm. The responses for these optimal conditions are 32.17 oC, 0.725 μm and 45.72 μm in that order.

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“…The AGNPs were added to the base oils at different weight percentages (0, 0.25, 0.5, and 0.75). 40 Dodecyl sulfate salt solution (in deionized water) was used to increase the surface properties of Ag nanoparticles by avoiding oxide formation and ion emission during the process. This procedure was described in the standard literature.…”

Section: Preparation Of Nano-based Bio-lubricants Samplesmentioning

confidence: 99%

Evaluation of the effect of silver nanoparticles on the tribological and thermophysical properties of bio-lubricants

Chinnachamy¹,

Durairaj

Murugapoopathi

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this article, the effect of infusion of silver nanoparticles into the base oil lubricants was investigated. In this study, Jatropha and Pongamia oils were used as base oils and silver nanoparticles infused at 0.25%, 0.5%, and 0.75% weight-percentage of the base oils to create nano-based bio-lubricants. The influence of silver nanoparticles on the Tribological and Thermophysical properties of the base oils was analyzed through various test procedures. The Pin-on-disc tribometer test was done to measure friction and wear at various loads. Pin made of Aluminum metal matrix composite fabricated by stir casting method was used and the results revealed that the inclusion of silver nanoparticles significantly improved the friction and wear properties of the base oils. Pin-worn surface morphology was analyzed using a field emission scanning electron microscope and X-ray diffraction. Thermal conductivity and kinematic viscosity of nano-based bio-lubricants were evaluated as per ASTM standards and the results showed that both the thermal conductivity and kinematic viscosity increased with the infusion of silver nanoparticles.

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Tribological Behaviour of Neem Oil with and without Graphene Nanoplatelets Using Four-Ball Tester

Cited by 30 publications

References 61 publications

Tribological characteristics of mahua oil with graphene nanoplatelets as anti-wear and extreme pressure additive

Tribological characteristics of mahua oil with graphene nanoplatelets as anti-wear and extreme pressure additive

Optimization of responses in single and multi-point machining processes using Dragon-fly algorithm coupled with TOPSIS and VIKOR decision-making approaches

Evaluation of the effect of silver nanoparticles on the tribological and thermophysical properties of bio-lubricants

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