Evolution of microstructure and mechanical properties of medium Mn steels during double annealing
ARLAZAROV, Artem
ArcelorMittal Maizières Research SA
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
ArcelorMittal Maizières Research SA
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
GOUNÉ, Mohamed
ArcelorMittal Maizières Research SA
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
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ArcelorMittal Maizières Research SA
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
ARLAZAROV, Artem
ArcelorMittal Maizières Research SA
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
ArcelorMittal Maizières Research SA
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
GOUNÉ, Mohamed
ArcelorMittal Maizières Research SA
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
< Reduce
ArcelorMittal Maizières Research SA
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Language
en
Article de revue
This item was published in
Materials Science and Engineering: A. 2012, vol. 542, p. 31-39
Elsevier
English Abstract
A double annealing process was applied to cold rolled medium Mn steel. The evolution of both microstructure and mechanical properties during the second annealing were analysed. Austenite reverted transformation (ART) was ...Read more >
A double annealing process was applied to cold rolled medium Mn steel. The evolution of both microstructure and mechanical properties during the second annealing were analysed. Austenite reverted transformation (ART) was observed during intercritical annealing. It was shown that a complex ultra-fine microstructure composed of three phases (retained austenite/martensite/ferrite) was formed and two types of morphologies were detected (lath-like and polygonal). Furthermore, a high volume fraction of retained austenite (22%), which was stabilized at room temperature, was the origin of a TRIP effect. A good balance between strength and ductility can be achieved by optimizing the heat treatment. The various results are discussed and some mechanisms are proposed to explain the observations.Read less <
English Keywords
Medium Mn steel
Retained austenite
Martensite recrystallization
Phase transformation
Transformation induced plasticity (TRIP)
Origin
Hal imported