Microstructures resulting from the interaction between ferrite recrystallization and austenite formation in dual-phase steels
GERMAIN, Lionel
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
Labex DAMAS
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
Labex DAMAS
HAZOTTE, Alain
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
Labex DAMAS
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Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
Labex DAMAS
GERMAIN, Lionel
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
Labex DAMAS
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
Labex DAMAS
HAZOTTE, Alain
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
Labex DAMAS
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
Labex DAMAS
CHBIHI, Abdelahad
ArcelorMittal Maizières Research SA
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
< Reduce
ArcelorMittal Maizières Research SA
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
Language
en
Article de revue
This item was published in
Journal of Materials Science. 2015, vol. 50, n° 1, p. 374-381
Springer Verlag
English Abstract
The present work investigates the interactions between ferrite recrystallization and austenite formation in dual-phase steels by experiments performed at high heating rate (100 °C/s). It was shown that both ferrite ...Read more >
The present work investigates the interactions between ferrite recrystallization and austenite formation in dual-phase steels by experiments performed at high heating rate (100 °C/s). It was shown that both ferrite recrystallization and austenite formation are strongly coupled and interdependent. The kinetics of ferrite recrystallization is strongly affected by the formation of austenite and can be even inhibited in some cases. The microstructure is more heterogeneous and anisotropic when both the austenite formation and the ferrite recrystallization overlap. It was highlighted that the degree of anisotropy depends on the volume fraction of austenite at a given temperature. Furthermore, an unusual behavior for austenite growth was highlighted. It is characterized by a much higher volume fraction than those obtained under OrthoEquilibrium and ParaEquilibrium. The results, especially those at 715 °C close to the eutectoid plateau, at which the driving force for austenite growth is classically low, suggest a diffusionless transformation for austeniteRead less <
ANR Project
Design des Alliages Métalliques pour Allègement des Structures - ANR-11-LABX-0008
Origin
Hal imported