TY - JOUR
T1 - Assessing the scale contributing factors of three carbide-free bainitic steels
T2 - A complementary theoretical and experimental approach
AU - Eres-Castellanos, Adriana
AU - Hidalgo, Javier
AU - Zorgani, Muftah
AU - Jahazi, Mohammad
AU - Toda-Caraballo, Isaac
AU - Caballero, Francisca G.
AU - Garcia-Mateo, Carlos
PY - 2021
Y1 - 2021
N2 - The bainitic ferrite plate thickness is the main parameter that controls the strength of this type of microstructures. Such thickness has been proved to mainly depend on the austenite yield strength, the driving force for the transformation and the transformation temperature. However, no research has focused on how these parameters evolve throughout the transformation and how this evolution can affect the outcome. In this study, thermal and thermomechanical treatments have been performed in three selected steels. The treatments have been designed in such a way that all the mentioned parameters are comparable, aiming to obtain similar microstructures in terms of bainitic ferrite plate thickness. However, significant differences have been found among the microstructures, with variations in plate thickness larger than 100 nm. These results indicate that there might be other factors that take part in the scale of bainitic microstructures. To explain these differences and based on the kinetics of the transformation and on the carbon content of austenite at the end of the transformation, a possible explanation has been proposed.
AB - The bainitic ferrite plate thickness is the main parameter that controls the strength of this type of microstructures. Such thickness has been proved to mainly depend on the austenite yield strength, the driving force for the transformation and the transformation temperature. However, no research has focused on how these parameters evolve throughout the transformation and how this evolution can affect the outcome. In this study, thermal and thermomechanical treatments have been performed in three selected steels. The treatments have been designed in such a way that all the mentioned parameters are comparable, aiming to obtain similar microstructures in terms of bainitic ferrite plate thickness. However, significant differences have been found among the microstructures, with variations in plate thickness larger than 100 nm. These results indicate that there might be other factors that take part in the scale of bainitic microstructures. To explain these differences and based on the kinetics of the transformation and on the carbon content of austenite at the end of the transformation, a possible explanation has been proposed.
KW - Anisotropy
KW - Ausforming
KW - Bainite
KW - Dilatometry
KW - Microstructural characterization
KW - Thermomechanical treatment
UR - http://www.scopus.com/inward/record.url?scp=85092532256&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2020.109217
DO - 10.1016/j.matdes.2020.109217
M3 - Article
AN - SCOPUS:85092532256
SN - 0264-1275
VL - 197
JO - Materials and Design
JF - Materials and Design
M1 - 109217
ER -