Numerical modeling of layer growth resulting from low temperature hybrid thermochemical treatment in AISI 316L stainless steel / Annissa Fanya

Low temperature hybrid thermochemical treatment in austenitic stainless steel leads to the formation of expanded austenite which consist of dual layer structure due to the simultaneous diffusion of nitrogen and carbon. The resultant layer can improve the surface mechanical properties of the stainles...

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Main Author:	Fanya, Annissa
Format:	Thesis
Language:	English
Published:	2023
Subjects:	TJ Mechanical engineering and machinery
Online Access:	https://ir.uitm.edu.my/id/eprint/82572/2/82572.pdf
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id	my-uitm-ir.82572
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spelling	my-uitm-ir.825722024-01-15T08:47:25Z Numerical modeling of layer growth resulting from low temperature hybrid thermochemical treatment in AISI 316L stainless steel / Annissa Fanya 2023 Fanya, Annissa TJ Mechanical engineering and machinery Low temperature hybrid thermochemical treatment in austenitic stainless steel leads to the formation of expanded austenite which consist of dual layer structure due to the simultaneous diffusion of nitrogen and carbon. The resultant layer can improve the surface mechanical properties of the stainless steel without deteriorates its corrosion resistance since the treatment is conducted in low temperature below 500°C. By using empirical approach and trial and error methods, it is difficult to understand the nature of the combined diffusion effect on the kinetic aspect of the hybrid layer development optimally. Besides, it is very time consuming and requires high cost. The present study aims to simulate the concentration-depth profiles as a result of the nitrogen and carbon simultaneous diffusion during low temperature hybrid thermochemical treatment in austenitic stainless steel by numerical modelling. The central explicit finite difference method is applied to calculate the diffusion equation in determining the concentration along the diffusion depth. The model incorporates several factors as another driving forces aside from concentration gradient as described by Fick’s 2nd law including the concentration-dependent diffusion coefficient, the composition-induced stress, and the trapping. 2023 Thesis https://ir.uitm.edu.my/id/eprint/82572/ https://ir.uitm.edu.my/id/eprint/82572/2/82572.pdf text en public masters Universiti Teknologi MARA (UiTM) College of Engineering Adenan, Mohd Shahriman
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Adenan, Mohd Shahriman
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Fanya, Annissa Numerical modeling of layer growth resulting from low temperature hybrid thermochemical treatment in AISI 316L stainless steel / Annissa Fanya
description	Low temperature hybrid thermochemical treatment in austenitic stainless steel leads to the formation of expanded austenite which consist of dual layer structure due to the simultaneous diffusion of nitrogen and carbon. The resultant layer can improve the surface mechanical properties of the stainless steel without deteriorates its corrosion resistance since the treatment is conducted in low temperature below 500°C. By using empirical approach and trial and error methods, it is difficult to understand the nature of the combined diffusion effect on the kinetic aspect of the hybrid layer development optimally. Besides, it is very time consuming and requires high cost. The present study aims to simulate the concentration-depth profiles as a result of the nitrogen and carbon simultaneous diffusion during low temperature hybrid thermochemical treatment in austenitic stainless steel by numerical modelling. The central explicit finite difference method is applied to calculate the diffusion equation in determining the concentration along the diffusion depth. The model incorporates several factors as another driving forces aside from concentration gradient as described by Fick’s 2nd law including the concentration-dependent diffusion coefficient, the composition-induced stress, and the trapping.
format	Thesis
qualification_level	Master's degree
author	Fanya, Annissa
author_facet	Fanya, Annissa
author_sort	Fanya, Annissa
title	Numerical modeling of layer growth resulting from low temperature hybrid thermochemical treatment in AISI 316L stainless steel / Annissa Fanya
title_short	Numerical modeling of layer growth resulting from low temperature hybrid thermochemical treatment in AISI 316L stainless steel / Annissa Fanya
title_full	Numerical modeling of layer growth resulting from low temperature hybrid thermochemical treatment in AISI 316L stainless steel / Annissa Fanya
title_fullStr	Numerical modeling of layer growth resulting from low temperature hybrid thermochemical treatment in AISI 316L stainless steel / Annissa Fanya
title_full_unstemmed	Numerical modeling of layer growth resulting from low temperature hybrid thermochemical treatment in AISI 316L stainless steel / Annissa Fanya
title_sort	numerical modeling of layer growth resulting from low temperature hybrid thermochemical treatment in aisi 316l stainless steel / annissa fanya
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	College of Engineering
publishDate	2023
url	https://ir.uitm.edu.my/id/eprint/82572/2/82572.pdf
_version_	1794191933793370112

Numerical modeling of layer growth resulting from low temperature hybrid thermochemical treatment in AISI 316L stainless steel / Annissa Fanya

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