Modelling_Carburisation_in_9Cr-1Mo_Ferritic_Steel.pdf (1.95 MB)
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Modelling carburisation in 9Cr-1Mo ferritic steel tube substrates in experimental CO2 atmospheres

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journal contribution
posted on 26.09.2019, 13:44 authored by M. S. A. Karunaratne, S. Yan, Rachel ThomsonRachel Thomson, Lawrence Coghlan, Rebecca HigginsonRebecca Higginson
By combining modelling and experimental work, new insights have been gained into the combined oxidation/carburisation of 9Cr-1Mo steels in CO2 rich environments. The breakaway-oxidation process is preceded by the rejection of carbon into the scale due to the poor solubility of carbon in the metal. Experimental TEM work reveals the formation of a carbide rich layer near the substrate surface which forms a further barrier against carbon ingress. The eventual oxidation of this layer could contribute to breakaway oxidation. A 2D finite-difference based diffusion model developed in combination with Thermo-Calc software underlines the role of specimen geometry on breakaway initiation.

Funding

EDF Energy

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Corrosion Science

Volume

163

Publisher

Elsevier

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Corrosion Science and the definitive published version is available at https://doi.org/10.1016/j.corsci.2019.108248.

Acceptance date

25/09/2019

Publication date

2019-09-27

Copyright date

2020

ISSN

0010-938X

Language

en

Depositor

Dr Rebecca Higginson

Article number

108248

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