|About this Abstract
||Materials Science & Technology 2012
||Steel Product Metallurgy and Applications
||Characterization of Microstructure Formation and Mechanical Behavior of an Advanced Medium Mn Steel
||Artem Arlazarov, Alain Hazotte, Olivier Bouaziz, Mohamed Gouné, Fréderic Kegel
|On-Site Speaker (Planned)
Nowadays, an important activity and interest can be noticed in the development and investigation of steels with the Mn content in between 4 and 12wt.%. Recent studies showed a very significant potential of such steels in terms of mechanical behaviour. An intercritical annealing of medium Mn steel provides an attractive combination of strength and ductility. In the past, some researchers already worked with such type of compositions and the observed formation of austenite from the initial martensitic structure was called “Austenite Reverted Transformation” (ART). These days, the ART concept is more and more used for the development of “third generation high strength steels”.For the moment all the ART treatments can be divided on two categories according to the initial structure before annealing: ART annealing of deformed martensite or bainite-martensite structure and ART annealing of fresh (non-deformed) martensite. In this study, a first attempt to describe the difference between two types of ART was done. Different annealing treatments were performed on a 0.1C – 4.6Mn (wt.%) steel with two initial microstructures in order to study recrystallization and austenite nucleation and growth. In addition, the tensile properties of this steel were measured as a function of ART holding time in the case of samples submitted to a double annealing.
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