Modelling the Boronizing Kinetics in AISI 316 Stainless Steel

• Authors: Z. Nait Abdellah , M. Keddam , A. Elias
• Languages of publication: EN

Abstracts

EN

This work deals with the simulation of the growth kinetics of the (FeB/Fe_2B) bilayer and the diffusion zone on a substrate of AISI 316 stainless steel exposed to the powder-pack boriding process, in the temperature range of 1123-1273 K and a time duration ranging from 2 to 10 h. The developed diffusion model employs a set of mass balance equations at the three growth fronts: [(FeB/Fe_2B), (FeB/diffusion zone) and (diffusion zone/substrate)] under certain assumptions, including the effect of the incubation times during the formation of iron borides and the diffusion zone. For this purpose, a computer code written in Matlab (version 6.5) was created to simulate the boriding kinetics. A good concordance was obtained when comparing the experimental parabolic growth constants taken from the literature and the simulated values of the parabolic growth constants: (k_{FeB}, k_1 and k_2). Moreover, the present model was also used to predict the thicknesses of the FeB and Fe_2B layers and the diffusion zone thickness at various treatment times and boriding temperatures. The simulated values were in good agreement with the experimental borided layers thicknesses.

Keywords

EN

81.15.Aa; 68.55.A-; 68.47.De; 68.55.jd

Discipline

• 81.15.Aa: Theory and models of film growth
• 68.55.jd: Thickness
• 68.55.A-: Nucleation and growth
• 68.47.De: Metallic surfaces

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 3
• Pages: 588-592

Dates

published

2012-09

Contributors

author

Z. Nait Abdellah

• Département de Chimie, Faculté des Sciences, Université Mouloud Mammeri, 15000, Tizi-Ouzou, Algeria
• Laboratoire de Technologie des Matériaux, Département de SDM, Faculté de Génie Mécanique, et Génie des Procédés, USTHB, B.P. N°32, 16111, El-Alia, Bab-Ezzouar, Algiers, Algeria

author

M. Keddam

• Laboratoire de Technologie des Matériaux, Département de SDM, Faculté de Génie Mécanique, et Génie des Procédés, USTHB, B.P. N°32, 16111, El-Alia, Bab-Ezzouar, Algiers, Algeria

author

A. Elias

• Département de Chimie, Faculté des Sciences, Université Mouloud Mammeri, 15000, Tizi-Ouzou, Algeria

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Identifiers

DOI

10.12693/APhysPolA.122.588