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@ARTICLE{deCastro:639102,
author = {de Castro, Pedro José and de Figueiredo Silveira, Antonio
Carlos and da Silva Rocha, Alexandre and Stark, Andreas and
Sourmail, Thomas and Epp, Jeremy},
title = {{I}mpact of hot and warm deformation on the bainite
morphology and kinetics during continuous cooling of low-
and medium-{C} carbide-free bainitic steels},
journal = {Materials and design},
volume = {257},
issn = {0264-1275},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PUBDB-2025-04305},
pages = {114433},
year = {2025},
abstract = {This work aims to describe the microstructural evolution of
bainite during continuous cooling from austenite with
varying grain size, morphology and defect density in two
carbide-free bainitic steels with low and medium C contents.
To achieve these conditions, hot and warm deformations were
applied, and compared to an undeformed condition.
Thermomechanical treatments were performed with a
dilatometer and monitored in-situ via high-energy X-Ray
diffraction. EBSD was employed for identifying the variant
pairing behaviour and misorientation distributions. In
comparison to the undeformed condition, a delay in the
transformation kinetics was observed for the deformed
conditions of both steels. The delay was correlated to the
dislocation density of austenite before the onset of the
bainitic transformation. Due to the delay, the bainite
transformation temperature was lower in the deformed
conditions. In spite of this, there was an increase in the
frequency of low-angle misorientation boundaries as given by
the misorientation distributions. This effect is unexpected
in view of established thermodynamic models for prediction
of the bainite morphology. This discrepancy was attributed
to the substructure introduced by the deformation, which was
inherited by bainite. A microstructure evolution history was
proposed based on the concurring metallurgical phenomena
during the deformation and subsequent continuous cooling.},
cin = {DOOR ; HAS-User / Hereon},
ddc = {690},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)Hereon-20210428},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3) / DFG project
G:(GEPRIS)327887503 - Energieeffiziente Prozesskette für
neue bainitische Schmiedestähle durch die Anwendung
thermo-mechanischer Umformprozesse (327887503)},
pid = {G:(DE-HGF)POF4-6G3 / G:(GEPRIS)327887503},
experiment = {EXP:(DE-H253)P-P07-20150101},
typ = {PUB:(DE-HGF)16},
doi = {10.1016/j.matdes.2025.114433},
url = {https://bib-pubdb1.desy.de/record/639102},
}