Comparaison de deux approches numériques pour le traitement de boruration thermochimique de l’acier XC38

Mebarek, Bendaoud; Zanoun, A.; Rais, Abdelmajid

doi:10.1051/metal/2015046

Cited by 3 publications

(6 citation statements)

References 11 publications

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“…The kinetic data and the boron activation energy in the pure iron were found in the reference , the diffusion coefficients of boron in the α-Fe and γ-Fe phases are taken from the reference [14][15][16][17][18][19][20][21][22][23][24]27].…”

Section: Resultsmentioning

confidence: 99%

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Simulation of the incubation time for the formation of (FeB/Fe₂B) bilayer on pure iron

Mebarek

Кеддам

Kulka

2021

Koroze a Ochrana Materialu

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In this work, a mathematical model was used in order to study the growth kinetics of (Fe2B/FeB) bilayer during bori-ding process basing on the second Fick’s law and mass balance equation. The run of the numerical simulation allowed calculating the incubation time (τ) of each boronized layer (Fe2B or FeB), and estimating the effect of this parameter on the growth of the boronized layer. The boride incubation time for forming the FeB or Fe2B layer on the pure iron substrate was incorporated into the present mathematical model. To simulate the value of the growth rate constant and the incubation time for the bilayer configuration, the experimental data available in the literature concerning the boronizing of pure iron were considered. Based on the experimental and simulation results, it was shown that the incubation time decreases with increasing temperature in the FeB and Fe2B phases. It was concluded from this study that the thickness of each boride layer depended on its growth rate constant and on another parameter kτ which was the rate constant of incubation time.The obtained results confirmed the validity of the present mathematical model and gave a good estimate of the incubation time during the formation of each boride layer as well as formulated the variation of this parameter with a mathematical equation. Furthermore, the comparison of experimental data with the simulated results of boronized layer thickness allowed to validate the present model.

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Section: Resultsmentioning

confidence: 99%

“…There are many studies in the literature devoted to modeling of boronizing kinetics, using a mathematical or predictive model [15][16]. Brakman et al [17] developed a simple model to study the growth kinetics of bilayer configuration (FeB/Fe 2 B) obtained after the powder-pack boronizing.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the incubation time for the formation of (FeB/Fe₂B) bilayer on pure iron

Mebarek

Кеддам

Kulka

2021

Koroze a Ochrana Materialu

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“…Generally, the presence of some alloying elements in the treated material modifies strongly the structure of the boride layer by diminishing its thickness and slowing down the diffusion rate of boron atoms [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…The significant advantages of this process are easy handling, simplicity, and the possibility of changing the chemical composition of the powder [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Diffusion Model for Simulating the Kinetics of Boronizing Process in the Case of FeB/Fe2B Bilayer Configuration

Belguendouz¹,

Mebarek²,

Кеддам³

et al. 2020

ACSM

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In this work, we developed a diffusion model based on the second Fick's law and the solving of the mass balance equations of the (FeB/Fe2B) interface to simulate the boronizing kinetics in the case of bilayer configuration (FeB/Fe2B) formed on AISI D2 steel. It is known that the boronizing process is a thermochemical surface treatment generally carried out at temperatures ranging between 1223 K and 1323 K. The knowledge of the temperature and the processing time are necessary to simulate and optimize the boronizing process. The developed model in this study is used to estimate the value of the growth rate constant in each phase, to simulate the boride layer thickness formed on AISI D2 steel, to determine the boron concentration profile and to evaluate the mass gain at the surface of the borided AISI D2 steel. To validate the developed model, we used the experimental data taken from the literature concerning the layers thicknesses of FeB and Fe2B layers obtained for different process parameters. Finally, these experimental values are compared to the calculated results. A good agreement was observed between the simulated results and the experimental data.

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Simulation of the Growth Kinetics of FeB and Fe2B Layers on AISI D2 Steel by the Integral Method

Кеддам¹,

Kulka

2018

Phys. Metals Metallogr.

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In the present study, a new diffusion model based on the integral method was suggested to investigate the boriding kinetics of pack-borided AISI D2 steel. This diffusion model considered the effect of boride incubation time of the total boride layer (FeB + Fe 2 B). Firstly, the diffusion coefficients of boron in the FeB and Fe 2 B layers were estimated using a simple approach derived from the integral method. Secondly, the values of boron activation energies for the FeB and Fe 2 B layers were determined and compared with the literature data. The formulated diffusion model has been validated by using additional boriding conditions. The total boride layer thicknesses, obtained experimentally at 1243 K for 2, 4 and 6 h, were compared to the predicted thicknesses. Finally, a good agreement was observed between the experimental and the predicted results.

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Comparaison de deux approches numériques pour le traitement de boruration thermochimique de l’acier XC38

Cited by 3 publications

References 11 publications

Simulation of the incubation time for the formation of (FeB/Fe₂B) bilayer on pure iron

Simulation of the incubation time for the formation of (FeB/Fe₂B) bilayer on pure iron

Diffusion Model for Simulating the Kinetics of Boronizing Process in the Case of FeB/Fe2B Bilayer Configuration

Simulation of the Growth Kinetics of FeB and Fe2B Layers on AISI D2 Steel by the Integral Method

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Comparaison de deux approches numériques pour le traitement de boruration thermochimique de l’acier XC38

Cited by 3 publications

References 11 publications

Simulation of the incubation time for the formation of (FeB/Fe2B) bilayer on pure iron

Simulation of the incubation time for the formation of (FeB/Fe2B) bilayer on pure iron

Diffusion Model for Simulating the Kinetics of Boronizing Process in the Case of FeB/Fe2B Bilayer Configuration

Simulation of the Growth Kinetics of FeB and Fe2B Layers on AISI D2 Steel by the Integral Method

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Simulation of the incubation time for the formation of (FeB/Fe₂B) bilayer on pure iron

Simulation of the incubation time for the formation of (FeB/Fe₂B) bilayer on pure iron