Characterization and Diffusion Kinetics of the Plasma Paste Borided AISI 440C Steel

Кеддам, М.; Chegroune, R.; Kulka, Michał; Panfil, Dominika; Ulker, Sukru; Taktak, Sukru

doi:10.1007/s12666-016-0934-4

Cited by 23 publications

(14 citation statements)

References 25 publications

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“…It is possible to obtain the expression of boron-concentration profile through the Fe 2 B layer using the Goodman's method also called the heat balance integral method (HBIM) [31]. for (5) By adopting such a shape, the distribution of boron concentration inside the Fe 2 B layer depends on the three time-dependent unknowns a(t), b(t) and u(t). It is also noted that the two parameters a(t) and b(t) must be positive because of a decreasing nature of the boron-concentration profile.…”

Section: The Integral Methodsmentioning

confidence: 99%

“…However, the Fe 2 B phase is more desirable than a double layer (FeB+Fe 2 B) because high tensile stresses develop in the FeB phase which is harder than Fe 2 B [2]. The boriding process can be carried out by using different processes such as: plasma boriding [3], plasma paste boriding [4,5], gas-boriding [6,7], liquid boriding [8], laser boriding [9] and solid boriding (paste or powder) [10][11][12]. Among all boriding methods, only powder packboriding has been widely employed in the industry since it is simpler and more economic.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the growth kinetics of Fe2B layers by the integral method

Кеддам¹,

Kulka

2018

J min metall B Metall

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In this study, an alternative approach based on the integral method was proposed to estimate the values of boron diffusion coefficients in the Fe 2 B layers grown at the surface of Armco iron. The set of differential algebraic equations (DAE) system was obtained to estimate the value of activation energy for boron diffusion when pack-boriding of Armco iron in the range of 1123 to 1273 K taking into account the boride incubation time. The present model has been validated by making a comparison between the experimental value of Fe 2 B layer thickness obtained at 1253 K for 5 h and the predicted results by using two different approaches. A good agreement was observed between these two set of data.

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Section: The Integral Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the growth kinetics of Fe2B layers by the integral method

Кеддам¹,

Kulka

2018

J min metall B Metall

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“…where E, H, P and c are Young's modulus (GPa), hardness (GPa), applied load (N) and crack length (m), respectively. The value of E is taken as 290 GPa [7].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Microstructural evolution and mechanical behaviour of boronized martensitic stainless steels

Mohan

Chaudhari

2022

Surface Engineering

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13Cr-4Ni and 16Cr-5Ni martensitic stainless steels are boronized at 900°C, 950°C and 1000°C for 2, 4, 6, 8 h using powder pack boronizing followed by tempering at 600°C for 2 h. Boronized layer morphology, composition and case depth are studied using optical microscopy, XRD, XPS and SEM. The influence of temperature and duration of boronizing on the growth kinetics of boronized layer is studied. Higher alloy content of 16Cr-5Ni MSS resulted in higher activation energy of boronizing, limiting the attainable case depth. Higher boronizing temperatures produced additional borides besides iron borides that increased hardness and decreased ductility, strain energy density and fracture toughness. Identified boronizing parameters could be useful in enhancing the performance of these grades in hydraulic machinery.

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“…The values of boron activation energies in some alloyed steels taken from the literature [8,17,[31][32][33][34][35][36] were compared to the estimated values from the integral method for AISI 316 steel as shown in Table 4. The reported values in terms of activation energies depended on different factors such as: the chemical composition of steels, the boriding method, the method of their determination and the chemical reactions involved during the boriding process.…”

Section: Determination Of Activation Energies For Boron Diffusion In mentioning

confidence: 99%

Application of integral method for investigating the boriding kinetics of AISI 316 steel

Zouzou

Кеддам

2020

Metall. Res. Technol.

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The present work is dealing with the modelling of boriding kinetics of AISI 316 steel in the temperature range 1123-1273 K. A diffusion model based on the integral method was used in order to investigate the kinetics of formation of FeB and Fe 2 B layers and that of diffusion zone formed on AISI 316 steel by considering the presence of boride incubation times. By using a particular solution of the resulting differential algebraic system, the diffusion coefficients in FeB, Fe 2 B and diffusion zone (DZ) were estimated as well as the corresponding values of activation energies. Finally, this present diffusion model has been experimentally validated for two additional boriding conditions (1243 K for 3 and 5 h of treatment). A good concordance was observed between the experimental and the simulated results in terms of layers' thicknesses.

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Characterization and Diffusion Kinetics of the Plasma Paste Borided AISI 440C Steel

Cited by 23 publications

References 25 publications

Analysis of the growth kinetics of Fe2B layers by the integral method

Analysis of the growth kinetics of Fe2B layers by the integral method

Microstructural evolution and mechanical behaviour of boronized martensitic stainless steels

Application of integral method for investigating the boriding kinetics of AISI 316 steel

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