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Evaluation of the effective diffusion coefficient of boron in the Fe2B phase in the presence of chemical stresses

  • Zahra Nait Abdellah , Mourad Keddam and Abdelhamid Elias
Published/Copyright: March 30, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 104 Issue 3

Abstract

In this work, the effective diffusion coefficient of boron in the Fe2B phase was evaluated by considering the effect of chemical stresses in the case of paste-boriding of AISI 4140 steel. Two kinetic approaches were proposed to evaluate the diffusion coefficient of boron in the Fe2B phase in the temperature range of 1 123–1 273 K, and considering the effect of the boride incubation times. By applying the mass balance equation at the (Fe2B/substrate) interface and the theory of elasticity, it is possible to determine the effective diffusion coefficient of boron in the Fe2B phase. The obtained value of activation energy of boron diffusion in the presence of chemical stresses was estimated as 158.78 kJ mol−1 using the experimental parabolic growth constants taken from the literature. In addition, the simulated values of effective diffusion coefficients of boron in the Fe2B phase are found to be sensitive to the change in the boriding temperature and to the increase in the upper boron content in the Fe2B phase within its composition range

Keywords: Boriding; Kinetics; Simulation; Chemical stresses; Boride incubation time
* Correspondence address, Prof. Mourad Keddam, Laboratoire de Technologie des Matériaux, Faculté de Génie Mécanique et Génie des Procédés, U.S.T.H.B, B.P. 32 El-Alia, Bab Ezzouar 16111, Alger Algeria. Tel: + 213 21 24 79 19, Fax: + 213 21 24 79 19, E-mail: or

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Received: 2012-1-17
Accepted: 2012-8-8
Published Online: 2014-03-30
Published in Print: 2013-03-14

© 2013, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110862
Keywords for this article
Boriding; Kinetics; Simulation; Chemical stresses; Boride incubation time

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. The thermodynamics of boron extraction from liquid silicon using SiO2–CaO–MgO slag treatment
  5. Viscosity estimation of semi-solid alloys based on thermal simulation compression tests
  6. Original Contributions
  7. Experimental study of phase equilibria in the “SnO”–CaO–SiO2 system in equilibrium with tin metal
  8. Prediction of the solidification path of Al-4.37Cu-27.02Mg ternary eutectic alloy with a unified microsegregation model coupled with Thermo-Calc
  9. Evaluation of the effective diffusion coefficient of boron in the Fe2B phase in the presence of chemical stresses
  10. Morphology evolution of γ′ precipitates in GTD-111 Ni-based superalloy with heat treatment parameters
  11. Hot forming of a new steel used in stamping dies and tooling
  12. Mechanical properties and corrosion behaviour of freestanding, precipitate-free magnesium WE43 thin films
  13. Sliding wear performance of Fe-, Ni- and Co-based hardfacing alloys for PTA cladding
  14. The suitability of selected austenitic stainless steels and hastelloy C276 alloys as substrates for thin film deposition using spray pyrolysis
  15. Synthesis, structural, optical and thermal analysis of nanostructured ZnO
  16. Electrical conductivity variation of (Bi2Te3)0.25(Sb2Te3)0.75 crystal grown using the zone melting method
  17. X-ray Absorption Near Edge Structure Studies of Pb1-xMnxTe(In, Ga) Systems
  18. DGM News
  19. DGM News
  20. Grain refining of aluminium alloys and silicon by means of boron-nitride particles
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