Comparison of Structure and Quenching Performance of Vegetable Oils

Souza, Ester Carvalho de; Fernandes, Márcio; Augustinho, Sylvana C. M.; Canale, Lauralice de Campos Franceschini; Totten, George E.

doi:10.1520/stp49170s

Cited by 2 publications

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“…Investigations have been carried out on various edible oils such as canola oil, coconut oil, cottonseed oil, groundnut oil, olive oil, palm oil, rapeseed oil, soybean oil, sunflower oil, etc. However, consumption of edible oils for industrial purposes may affect the food chain supply [5][6][7][8][9]. In this present work, the waste coconut cooking oil is used as an alternative quench medium for industrial heat treatment by subjecting it to chemical treatment.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Characteristics and Cooling Performance of Treated Kitchen Coconut Oil

Roy

Samuel

Prabhu

2021

Heat Treating Conference

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Quenching is one of the most basic and widely used heat treatment processes. Mineral Oil or petroleum oil base stocks are the conventional quench media used for quench hardening heat treatment since the 19th century. However, mineral oils are not environment friendly as they are toxic, nonbiodegradable, and non-renewable. Many alternative ecofriendly quenchants have been developed to replace mineral oil such as vegetable oils, polymer quenchants, and nanofluids. Although most of the vegetable oils show superior cooling performance to mineral oil, their practical application is limited owing to their high cost of production and low thermal stability. In this study, the kitchen coconut oil was chemically treated and its cooling performance and heat transfer characteristics were assessed and compared with that of refined coconut oil and mineral oil. The thermophysical properties of chemically treated waste cooking oil were found to be higher than refined and mineral oils. Chemically treated oil showed better wettability. The quenching experiments were conducted using an Inconel 600 standard probe according to ISO 9950 and ASTM D 6200 standards. The vapor blanket stage was shorter for the chemically treated oil as compared with refined and mineral oils. Inverse heat conduction problem (IHCP) was solved for estimating heat flux transients from the temperature data and thermo-physical properties of the Inconel probe. The average peak heat flux was highest for chemically treated oil compared to both refined coconut oil and mineral oil.

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Section: Introductionmentioning

confidence: 99%

Heat Transfer Characteristics and Cooling Performance of Treated Kitchen Coconut Oil

Roy

Samuel

Prabhu

2021

Heat Treating Conference

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“…Vegetable oils are natural products of plant origin consisting of ester mixtures derived from glycerol with chains of fatty acid containing about 14 to 20 carbon atoms with different degree of unsaturation [8]. Physicochemical properties of triglyceride and its applications depend upon fatty acid constituents in their molecule.…”

Section: Introductionmentioning

confidence: 99%

Performance Assessment of Selected Nigerian Vegetable Oils as Quenching Media in Hardening Process for Medium Carbon Steel

Agboola¹,

Kamardeen²,

Mudiare³

et al. 2015

JMMCE

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A comparative study was carried out to investigate the suitability of some selected Nigerian vegetable oils as alternative quenchant to SAE40 engine oil for industrial heat treatment of Medium Carbon steels. The study involved the characterization of physicochemical properties and fatty acid profile of cotton seed oil, palm kernel oil, neem seed oil and palm oil. The quenching performance of these vegetable oils was conducted at quenchant bath temperatures of 34˚C, 50˚C, 70˚C, and 100˚C. SAE40 engine oil (Standard quenchant) and tap water served as control. The effect of cooling rates of the quenching media on mechanical properties and microstructure of the quenched steel samples were investigated. The results obtained show that the different vegetable oils have different viscosity and viscosity-temperature behavior just as their molecular structures were different. The mechanical properties of the as-quenched specimens in these oils show that the hardness of steel quenched in palm kernel oil was highest 40.85HRC. As received sample absorbed the highest amount of energy (183 J) before fracture while sample quenched in water absorbs least energy (28 J). Hence vegetable oil is suitable as alternative quenchant to petroleum based SAE40 engine oil for quenching medium carbon steels, without cracking or distortion, the most suitable among them being palm kernel oil.

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Comparison of Structure and Quenching Performance of Vegetable Oils

Cited by 2 publications

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Heat Transfer Characteristics and Cooling Performance of Treated Kitchen Coconut Oil

Heat Transfer Characteristics and Cooling Performance of Treated Kitchen Coconut Oil

Performance Assessment of Selected Nigerian Vegetable Oils as Quenching Media in Hardening Process for Medium Carbon Steel

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