TY - JOUR
T1 - Influence of bainite reaction on the kinetics of carbon redistribution during the Quenching and Partitioning process
AU - Nishikawa, Arthur S.
AU - Santofimia Navarro, Maria
AU - Sietsma, Jilt
AU - Goldenstein, Hélio
N1 - Accepted Author Manuscript
PY - 2018
Y1 - 2018
N2 - In the present study the microstructural evolution and kinetics of carbon redistribution during the partitioning step of the Quenching and Partitioning process are investigated by means of a modeling approach that simultaneously considers the martensite-austenite carbon partitioning and the decomposition of austenite into bainitic ferrite. The development of the phase fractions, interface position, and carbon compositions are analyzed for two different binary Fe-C alloys with distinct initial carbon compositions and simulation geometries. The composition dependence of carbon diffusivity in austenite is taken into account for solving the diffusion field equations. Simulations indicate that kinetics of carbon partitioning from martensite to austenite is controlled by carbon diffusion in martensite and it is little affected by simultaneous occurrence of bainite reaction. On the other hand martensite-austenite carbon partitioning strongly influences the bainite reaction by inhibiting the growth of bainitic ferrite.
AB - In the present study the microstructural evolution and kinetics of carbon redistribution during the partitioning step of the Quenching and Partitioning process are investigated by means of a modeling approach that simultaneously considers the martensite-austenite carbon partitioning and the decomposition of austenite into bainitic ferrite. The development of the phase fractions, interface position, and carbon compositions are analyzed for two different binary Fe-C alloys with distinct initial carbon compositions and simulation geometries. The composition dependence of carbon diffusivity in austenite is taken into account for solving the diffusion field equations. Simulations indicate that kinetics of carbon partitioning from martensite to austenite is controlled by carbon diffusion in martensite and it is little affected by simultaneous occurrence of bainite reaction. On the other hand martensite-austenite carbon partitioning strongly influences the bainite reaction by inhibiting the growth of bainitic ferrite.
KW - Bainite
KW - Mixed-mode model
KW - Modeling
KW - Quenching and Partitioning
UR - http://www.scopus.com/inward/record.url?scp=85030710143&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:78aed900-ff24-408e-bc86-7459406ac0a2
U2 - 10.1016/j.actamat.2017.09.048
DO - 10.1016/j.actamat.2017.09.048
M3 - Article
AN - SCOPUS:85030710143
VL - 142
SP - 142
EP - 151
JO - Acta Materialia
JF - Acta Materialia
SN - 1359-6454
ER -