Application of advanced experimental techniques for the microstructural characterization of nanobainitic steels Timokhina, Ilana, Beladi, Hossein, Xiong, Xiang, Adachi, Yoshitaka and Hodgson, Peter 2011, Application of advanced experimental techniques for the microstructural characterization of nanobainitic steels, Solid state phenomena, vol. 172-174, pp. 1249-1254. Attached Files Name Description MIMEType Size Downloads Title Application of advanced experimental techniques for the microstructural characterization of nanobainitic steels Author(s) Timokhina, Ilana orcid.org/0000-0003-1989-0835 Beladi, Hossein orcid.org/0000-0003-0131-707X Xiong, Xiang Adachi, Yoshitaka Hodgson, Peter Journal name Solid state phenomena Volume number 172-174 Start page 1249 End page 1254 Total pages 6 Publisher Scitec Publications Place of publication Uetikon-Zurich, Switzerland Publication date 2011 ISSN 1012-0394 Keyword(s) APT bainitic ferrite high strength steels nanos-tructured bainitic steel retained austenite TEM TRIP effect Summary A 0.79C-1.5Si-1.98Mn-0.98Cr-0.24Mo-1.06Al-1.58Co (wt%) steel was isothermally heat treated at 350°C bainitic transformation temperature for 1 day to form fully bainitic structure with nano-layers of bainitic ferrite and retained austenite, while a 0.26C-1.96Si-2Mn-0.31Mo (wt%) steel was subjected to a successive isothermal heat treatment at 700°C for 300 min followed by 350°C for 120 min to form a hybrid microstructure consisting of ductile ferrite and fine scale bainite. The dislocation density and morphology of bainitic ferrite, and retained austenite characteristics such as size, and volume fraction were studied using Transmission Electron Microscopy. It was found that bainitic ferrite has high dislocation density for both steels. The retained austenite characteristics and bainite morphology were affected by composition of steels. Atom Probe Tomography (APT) has the high spatial resolution required for accurate determination of the carbon content of the bainitic ferrite and retained austenite, the solute distribution between these phases and calculation of the local composition of fine clusters and particles that allows to provide detailed insight into the bainite transformation of the steels. The carbon content of bainitic ferrite in both steels was found to be higher compared to the para-equilibrium level of carbon in ferrite. APT also revealed the presence of fine C-rich clusters and Fe-C carbides in bainitic ferrite of both steels. Notes Presented at the International Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM 2010) Language eng Field of Research 091207 Metals and Alloy Materials Socio Economic Objective 861103 Basic Iron and Steel Products HERDC Research category C1 Refereed article in a scholarly journal Copyright notice ©2011, Trans Tech Publications, Switzerland Persistent URL http://hdl.handle.net/10536/DRO/DU:30044212 Document type: Journal Article Collection: Centre for Material and Fibre Innovation Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Thu, 05 Apr 2012, 15:58:07 EST Wed, 18 Apr 2012, 09:58:08 EST Wed, 18 Apr 2012, 09:59:53 EST Fri, 08 Nov 2013, 11:41:41 EST Fri, 17 Oct 2014, 11:27:36 EST Sat, 02 Dec 2017, 01:34:59 EST Filtered Full Citation counts:   Cited 0 times in TR Web of Science Cited 3 times in Scopus Search Google Scholar Access Statistics: 412 Abstract Views, 6 File Downloads  -  Detailed Statistics Created: Thu, 05 Apr 2012, 15:58:07 EST

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