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  Growth of bainitic ferrite and carbon partitioning during the early stages of bainite transformation in a 2 mass silicon steel studied by in situ neutron diffraction, TEM and APT

Timokhina, I. B., Liss, K.-D., Raabe, D., Rakha, K., Beladi, H., Xiong, X., et al. (2016). Growth of bainitic ferrite and carbon partitioning during the early stages of bainite transformation in a 2 mass silicon steel studied by in situ neutron diffraction, TEM and APT. Journal of Applied Crystallography, 49, 399-414. doi:10.1107/S1600576716000418.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-B9C7-E Version Permalink: http://hdl.handle.net/21.11116/0000-0001-B9C8-D
Genre: Journal Article

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 Creators:
Timokhina, Iliana B.1, Author              
Liss, Klaus-Dieter2, Author              
Raabe, Dierk3, Author              
Rakha, Khushboo1, Author              
Beladi, Hossein1, Author              
Xiong, Xiangyuan4, Author              
Hodgson, Peter D.1, Author              
Affiliations:
1Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, Geelong, VIC, Australia, persistent22              
2Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales 2232, Australia, ou_persistent22              
3Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
4Monash Centre for Electron Microscopy, Monash University, VIC, Australia, persistent22              

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Free keywords: Austenite; Bainite; Electron microscopy; Ferrite; Grain boundaries; High resolution transmission electron microscopy; Isotherms; Neutron diffraction; Neutrons; Probes; Silicon steel; Steel metallography; Transmission electron microscopy, Atom probe tomography; Bainite transformations; Bainitic ferrite; Carbon content; Retained austenite, Bainitic transformations
 Abstract: In situ neutron diffraction, transmission electron microscopy (TEM) and atom probe tomography (APT) have been used to study the early stages of bainite transformation in a 2 mass Si nano-bainitic steel. It was observed that carbon redistribution between the bainitic ferrite and retained austenite at the early stages of the bainite transformation at low isothermal holding occurred in the following sequence: (i) formation of bainitic ferrite nuclei within carbon-depleted regions immediately after the beginning of isothermal treatment; (ii) carbon partitioning immediately after the formation of bainitic ferrite nuclei but substantial carbon diffusion only after 33 min of bainite isothermal holding; (iii) formation of the carbon-enriched remaining austenite in the vicinity of bainitic laths at the beginning of the transformation; (iv) segregation of carbon to the dislocations near the austenite/ferrite interface; and (v) homogeneous redistribution of carbon within the remaining austenite with the progress of the transformation and with the formation of bainitic ferrite colonies. Bainitic ferrite nucleated at internal defects or bainite/austenite interfaces as well as at the prior austenite grain boundary. Bainitic ferrite has been observed in the form of an individual layer, a colony of layers and a layer with sideplates at the early stages of transformation. © 2016 International Union of Crystallography.

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Language(s): eng - English
 Dates: 2016
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1107/S1600576716000418
BibTex Citekey: Timokhina2016399
 Degree: -

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Title: Journal of Applied Crystallography
  Abbreviation : J. Appl. Cryst.
Source Genre: Journal
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Publ. Info: Oxford, England : Blackwell Publishing on behalf of the International Union of Crystallography
Pages: - Volume / Issue: 49 Sequence Number: - Start / End Page: 399 - 414 Identifier: ISSN: 0021-8898
CoNE: https://pure.mpg.de/cone/journals/resource/954925410812