In Situ High-Temperature EBSD and 3D Phase Field Studies of the Austenite-Ferrite Transformation in a Medium Mn Steel

Hussein Farahani*, Gerrit Zijlstra, Maria Giuseppina Mecozzi, Václav Ocelík, Jeff Th. M. De Hosson, Sybrand Van Der Zwaag

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

9 Citaten (Scopus)
51 Downloads (Pure)

Samenvatting

In this research, in situ high-temperature electron backscattered diffraction (EBSD) mapping is applied to record and analyze the migration of the α/3 interfaces during cyclic austenite-ferrite phase transformations in a medium manganese steel. The experimental study is supplemented with related 3D phase field (PF) simulations to better understand the 2D EBSD observations in the context of the 3D transformation events taking place below the surface. The in situ EBSD observations and PF simulations show an overall transformation behavior qualitatively similar to that measured in dilatometry. The behavior and kinetics of individual austenite-ferrite interfaces during the transformation is found to have a wide scatter around the average interface behavior deduced on the basis of the dilatometric measurements. The trajectories of selected characteristic interfaces are analyzed in detail and yield insight into the effect of local conditions in the vicinity of interfaces on their motion, as well as the misguiding effects of 2D observations of processes taking place in 3D.

Originele taal-2English
Pagina's (van-tot)639-655
Aantal pagina's17
TijdschriftMicroscopy and Microanalysis
Volume25
Nummer van het tijdschrift3
DOI's
StatusPublished - jun-2019

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