Constrained Equilibrium Reactions in a Low Carbon Steel During Heat Treatments Below the MS

Felipe M. Castro Cerda; Constantinos Goulas; Eliseo I. Hernández; Juan P. Sanhueza; Tanya Ros-Yanez; Roumen H. Petrov

doi:10.1002/srin.202200841

Constrained Equilibrium Reactions in a Low Carbon Steel During Heat Treatments Below the M_S

Felipe M. Castro Cerda^*, Constantinos Goulas, Eliseo I. Hernández, Juan P. Sanhueza, Tanya Ros-Yanez, Roumen H. Petrov

^*Corresponding author for this work

Advanced Manufacturing, Sustainable Products & Energy Systems

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Abstract

Isothermal heat treatments below the martensite start temperature are carried out in a 0.25C-1.4Mn-1.4Si-0.32Mo steel (in wt%). The microstructural observation reveals a combination of tempered lath and plate martensite, accompanied by bainite and retained austenite. The temperature variation of the austenitic carbon content under different constrained equilibrium models is calculated and compared with experimental measurements. Neither of the existing models seems to predict the behavior of the measured austenitic carbon content in the temperature range studied. The results suggest that the diffusional formation of bainite governs the carbon content of austenite at temperatures nearby the M_S.

Original language	English
Article number	2200841
Journal	Steel research international
Volume	94
Issue number	8
DOIs	https://doi.org/10.1002/srin.202200841
Publication status	Published - Aug 2023

Keywords

Austenite
Constrained equilibrium
Martensite
Quenching and partitioning
Stabilization
2024 OA procedure

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10.1002/srin.202200841

ArticleFinal published version, 2.91 MBLicence: Taverne

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title = "Constrained Equilibrium Reactions in a Low Carbon Steel During Heat Treatments Below the MS",

abstract = "Isothermal heat treatments below the martensite start temperature are carried out in a 0.25C-1.4Mn-1.4Si-0.32Mo steel (in wt%). The microstructural observation reveals a combination of tempered lath and plate martensite, accompanied by bainite and retained austenite. The temperature variation of the austenitic carbon content under different constrained equilibrium models is calculated and compared with experimental measurements. Neither of the existing models seems to predict the behavior of the measured austenitic carbon content in the temperature range studied. The results suggest that the diffusional formation of bainite governs the carbon content of austenite at temperatures nearby the MS.",

keywords = "Austenite, Constrained equilibrium, Martensite, Quenching and partitioning, Stabilization, 2024 OA procedure",

author = "{Castro Cerda}, {Felipe M.} and Constantinos Goulas and Hern{\'a}ndez, {Eliseo I.} and Sanhueza, {Juan P.} and Tanya Ros-Yanez and Petrov, {Roumen H.}",

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month = aug,

doi = "10.1002/srin.202200841",

language = "English",

volume = "94",

journal = "Steel research international",

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T1 - Constrained Equilibrium Reactions in a Low Carbon Steel During Heat Treatments Below the MS

AU - Castro Cerda, Felipe M.

AU - Goulas, Constantinos

AU - Hernández, Eliseo I.

AU - Sanhueza, Juan P.

AU - Ros-Yanez, Tanya

AU - Petrov, Roumen H.

PY - 2023/8

Y1 - 2023/8

N2 - Isothermal heat treatments below the martensite start temperature are carried out in a 0.25C-1.4Mn-1.4Si-0.32Mo steel (in wt%). The microstructural observation reveals a combination of tempered lath and plate martensite, accompanied by bainite and retained austenite. The temperature variation of the austenitic carbon content under different constrained equilibrium models is calculated and compared with experimental measurements. Neither of the existing models seems to predict the behavior of the measured austenitic carbon content in the temperature range studied. The results suggest that the diffusional formation of bainite governs the carbon content of austenite at temperatures nearby the MS.

AB - Isothermal heat treatments below the martensite start temperature are carried out in a 0.25C-1.4Mn-1.4Si-0.32Mo steel (in wt%). The microstructural observation reveals a combination of tempered lath and plate martensite, accompanied by bainite and retained austenite. The temperature variation of the austenitic carbon content under different constrained equilibrium models is calculated and compared with experimental measurements. Neither of the existing models seems to predict the behavior of the measured austenitic carbon content in the temperature range studied. The results suggest that the diffusional formation of bainite governs the carbon content of austenite at temperatures nearby the MS.

KW - Austenite

KW - Constrained equilibrium

KW - Martensite

KW - Quenching and partitioning

KW - Stabilization

KW - 2024 OA procedure

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DO - 10.1002/srin.202200841

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VL - 94

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Constrained Equilibrium Reactions in a Low Carbon Steel During Heat Treatments Below the M_S

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