Pouvoir de refroidissement des solutions de trempe à base de polymères hydrosolubles

Ikkene, Rafika; Koudil, Zahia; Mouzali, M.

doi:10.1016/j.crci.2007.09.005

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…The estimation of different cooling parameters, obtained from cooling curves, is essential for predicting the performances of a quenchant, namely hardening power-HP, HTC, and microstructure, which are the main purpose of this study. The assessment of quenching performance by cooling curve analysis is the most informative method of characterizing a quenchant, since it is seen as quality control tools to analyze the effect of experimental parameters on the cooling capacity of the quenchant (Ref [33][34][35]. In this work, an equipment from Swerea IVF called IVF SmartQuench was used for producing cooling curves of the quenchants.…”

Section: Cooling Curve Analysismentioning

confidence: 99%

Cooling Characteristic of Polymeric Quenchant: Calculation of HTC and Prediction of Microstructure and Hardness

Ikkene

Koudil

MOUZALI

2014

J. of Materi Eng and Perform

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The present paper discusses the influence of experimental conditions on the quenching performance of poly(2-ethyl-2-oxazoline) (PEOX) aqueous solutions used as cooling medium, using a standard ISO Inconel alloy probe for measurements of cooling rate. The evaluation procedure is demonstrated on characterization of cooling power of water-based polymer (PEOX) solutions by using different concentration, temperatures, and agitation conditions of the cooling media. The results show that the different experimental conditions have a significant effect on the cooling performance. The polymer quenching mechanism and the comparative cooling characteristics of water, and water-based PEOX polymer solution with concentrations from 2.5 to 15 wt.% were discussed. The study involved the assessment of the quenching severity by calculating the hardening power (HP) via empirical equations. Calculation of heat transfer coefficients as well as prediction of microstructural constituents and the hardness profile in a cross-section of steel sample were carried out on the basis of inverse calculation from the recorded cooling curve.

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Section: Cooling Curve Analysismentioning

confidence: 99%

Cooling Characteristic of Polymeric Quenchant: Calculation of HTC and Prediction of Microstructure and Hardness

Ikkene

Koudil

MOUZALI

2014

J. of Materi Eng and Perform

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“…Most of the time, when boiling takes place in industrial processes, the liquid located far from the vaporizing front is below its saturation temperature. The difference in temperature (usually called subcooling) has been shown to significantly improve heat transfers [9,[28][29][30][31][32][33]. The entire boiling curve is shifted at a higher Leindenfrost temperature the minimum temperature for the stabilization of a vapor film.…”

Section: Introductionmentioning

confidence: 99%

A Vaporization Model for Continuous Surface Force Approaches and Subcooled Configurations

Brissot,

Cailly-Brandstäter,

Hachem

et al. 2023

Fluids

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The integration of phase change phenomena through an interface is a numerical challenge that requires proper attention. Solutions to properly ensure mass and energy conservation were developed for finite difference and finite volume methods, but not for Finite Element methods. We propose a Finite Element phase change model based on an Eulerian framework with a Continuous Surface Force (CSF) approach. It handles both momentum and energy conservation at the interface for anisotropic meshes in a light an efficient way. To do so, a model based on the Level Set method is developed. A thick interface is considered to fit with the CSF approach. To properly compute the energy conservation, heat fluxes are extended through this interface thanks to the resolution of a transport equation. A dedicated pseudo compressible Navier–Stokes solver is added to compute velocity jumps with a source term at the interface in the velocity divergence equation. Several 1D and 2D benchmarks are considered with increasing complexity to highlight the performances of each feature of the framework. This stresses the capacity of the model to properly tackle phase change problems.

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Cooling Capacity Optimization: Calculation of Hardening Power of Aqueous Solution Based on Poly(N-Vinyl-2-Pyrrolidone)

Koudil

Ikkene

Mouzali

2013

J. of Materi Eng and Perform

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Pouvoir de refroidissement des solutions de trempe à base de polymères hydrosolubles

Abstract: Laboratoire d'e ´tudes physico-chimiques des mate ´riaux, application a `l'environnement (LEPCMAE),

Cited by 5 publications

References 15 publications

Cooling Characteristic of Polymeric Quenchant: Calculation of HTC and Prediction of Microstructure and Hardness

Cooling Characteristic of Polymeric Quenchant: Calculation of HTC and Prediction of Microstructure and Hardness

A Vaporization Model for Continuous Surface Force Approaches and Subcooled Configurations

Cooling Capacity Optimization: Calculation of Hardening Power of Aqueous Solution Based on Poly(N-Vinyl-2-Pyrrolidone)

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