Print Email Facebook Twitter In situ high-temperature EBSD and 3D phase field studies of the austenite-ferrite transformation in a medium Mn steel Title In situ high-temperature EBSD and 3D phase field studies of the austenite-ferrite transformation in a medium Mn steel Author Farahani, H. (TU Delft (OLD) MSE-3; TU Delft Novel Aerospace Materials) Zijlstra, Gerrit (Rijksuniversiteit Groningen) Mecozzi, M.G. (TU Delft (OLD) MSE-3) Ocelík, Václav (Rijksuniversiteit Groningen) De Hosson, Jeff Th M. (Rijksuniversiteit Groningen) van der Zwaag, S. (TU Delft Novel Aerospace Materials; Tsinghua University) Date 2019 Abstract 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. Subject austenite-ferrite interface migrationcyclic partial phase transformationsEBSDmedium manganese steelphase field simulationsteel To reference this document use: http://resolver.tudelft.nl/uuid:6e2d9587-7800-4e21-8eb6-e585c4f63fb7 DOI https://doi.org/10.1017/S143192761900031X Embargo date 2020-01-01 ISSN 1431-9276 Source Microscopy and Microanalysis, 25 (3), 639-655 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2019 H. Farahani, Gerrit Zijlstra, M.G. Mecozzi, Václav Ocelík, Jeff Th M. De Hosson, S. van der Zwaag Files PDF in_situ_hightemperature_e ... _steel.pdf 1.77 MB Close viewer /islandora/object/uuid:6e2d9587-7800-4e21-8eb6-e585c4f63fb7/datastream/OBJ/view