Constrained Equilibrium Reactions in a Low Carbon Steel During Heat Treatments Below the M<sub>S</sub>

Journal article (2023)

Authors

F. Castro Cerda Universidad de Santiago de Chile
Constantinos Goulas University of Twente
Eliseo I. Hernández Universidad de Santiago de Chile, Universiteit Gent
Juan P. Sanhueza University of Concepcion
Tanya Ros-Yanez Cleveland-Cliffs Inc.
R.H. Petrov Team Maria Santofimia Navarro - Mechanical, Maritime and Materials Engineering , Universiteit Gent
Research Group
Team Maria Santofimia Navarro (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2023 F. Castro Cerda, Constantinos Goulas, Eliseo I. Hernández, Juan P. Sanhueza, Tanya Ros-Yanez, R.H. Petrov
DOI
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https://doi.org/10.1002/srin.202200841
Martensite Austenite Stabilization Quenching and partitioning Constrained equilibrium
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Published Date

2023

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Research Group

Team Maria Santofimia Navarro

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.