Cementite dissolution kinetics and its impact on austenite formation and carbon distribution during continuous heating of cold-rolled low-carbon steel
Abstract
The present work combines advanced microstructural characterization and thermodynamic calculations to investigate austenite formation from ferrite-pearlite cold rolled steel. Slow 3°C/s and relatively fast 30°C/s heating rates similar to the industrial processing conditions were applied. In situ synchrotron High Energy X-ray diffraction (HEXRD) was used to track the evolutions of austenite, ferrite and cementite fractions in real time as a function of temperature. The carbon concentration in austenite was measured by tracking its cell parameter. Main stages of microstructural evolutions, including recrystallization, were examined by Scanning Electron Microscopy (SEM) after interrupted heating at different temperatures. The austenite transformation kinetics during the heating stage were observed to be independent of the heating rate, regardless of interactions with recrystallization. This is interpreted by assuming that the austenite grows into ferrite under local equilibrium with negligible partition (LENP). The concentration of carbon in the austenite is in agreement with this assumption, but the fraction of austenite is overestimated. This discrepancy is interpreted by considering the kinetics of the cementite carbides dissolution, which retards the release of the carbon and thus the formation of austenite.
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BibTeX
@article{barchid2026cementite,
title = {{Cementite dissolution kinetics and its impact on austenite formation and carbon distribution during continuous heating of cold-rolled low-carbon steel}},
author = {Ayyoube Barchid and Julien Teixeira and Sebastien Allain and Benoît Denand and Guillaume Geandier and Brahim Boubeker and Youssef Samih and Johan Jacquemin},
journal = {Journal of Materials Research and Technology},
year = {2026},
month = oct,
doi = {10.1016/j.jmrt.2026.08.036},
url = {https://hal.science/hal-05845865v1},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Cementite dissolution kinetics and its impact on austenite formation and carbon distribution during continuous heating of cold-rolled low-carbon steel
AU - Ayyoube Barchid
AU - Julien Teixeira
AU - Sebastien Allain
AU - Benoît Denand
AU - Guillaume Geandier
AU - Brahim Boubeker
AU - Youssef Samih
AU - Johan Jacquemin
PY - 2026
DA - 2026/10/30
JO - Journal of Materials Research and Technology
DO - 10.1016/j.jmrt.2026.08.036
UR - https://hal.science/hal-05845865v1
AB - The present work combines advanced microstructural characterization and thermodynamic calculations to investigate austenite formation from ferrite-pearlite cold rolled steel. Slow 3°C/s and relatively fast 30°C/s heating rates similar to the industrial processing conditions were applied. In situ synchrotron High Energy X-ray diffraction (HEXRD) was used to track the evolutions of austenite, ferrite and cementite fractions in real time as a function of temperature. The carbon concentration in austenite was measured by tracking its cell parameter. Main stages of microstructural evolutions, including recrystallization, were examined by Scanning Electron Microscopy (SEM) after interrupted heating at different temperatures. The austenite transformation kinetics during the heating stage were observed to be independent of the heating rate, regardless of interactions with recrystallization. This is interpreted by assuming that the austenite grows into ferrite under local equilibrium with negligible partition (LENP). The concentration of carbon in the austenite is in agreement with this assumption, but the fraction of austenite is overestimated. This discrepancy is interpreted by considering the kinetics of the cementite carbides dissolution, which retards the release of the carbon and thus the formation of austenite.
SN - 2238-7854
SN - 2214-0697
ER -