Modelling_Carburisation_in_9Cr-1Mo_Ferritic_Steel.pdf (1.95 MB)
Download fileModelling carburisation in 9Cr-1Mo ferritic steel tube substrates in experimental CO2 atmospheres
journal contribution
posted on 2019-09-26, 13:44 authored by M. S. A. Karunaratne, S. Yan, Rachel ThomsonRachel Thomson, Lawrence Coghlan, Rebecca HigginsonRebecca HigginsonBy 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 ScienceVolume
163Publisher
ElsevierVersion
- AM (Accepted Manuscript)
Rights holder
© ElsevierPublisher 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
2019-09-25Publication date
2019-09-27Copyright date
2020ISSN
0010-938XPublisher version
Language
- en