The formation of ultrafine ferrite through static transformation in low carbon steels Adachi, Yoshitaka, Wakita, Masayuki, Beladi, Hossein and Hodgson, Peter 2007, The formation of ultrafine ferrite through static transformation in low carbon steels, Acta Materialia, vol. 55, no. 14, pp. 4925-4934, doi: 10.1016/j.actamat.2007.05.024. Attached Files Name Description MIMEType Size Downloads Title The formation of ultrafine ferrite through static transformation in low carbon steels Author(s) Adachi, Yoshitaka Wakita, Masayuki Beladi, Hossein orcid.org/0000-0003-0131-707X Hodgson, Peter Journal name Acta Materialia Volume number 55 Issue number 14 Start page 4925 End page 4934 Publisher Elsevier Science Place of publication Oxford, England Publication date 2007-07-03 ISSN 1359-6454 1873-2453 Keyword(s) ultrarefinement heavy deformation warm deformation transformation microbands Summary A novel approach was used to produce an ultrafine grain structure in low carbon steels with a wide range of hardenability. This included warm deformation of supercooled austenite followed by reheating in the austenite region and cooling (RHA). The ultrafine ferrite structure was independent of steel composition. However, the mechanism of ferrite refinement hanged with the steel quench hardenability. In a relatively low hardenable steel, the ultrafine structure was produced through dynamic strain-induced transformation, whereas the ferrite refinement was formed by static transformation in steels with high quench hardenability. The use of a model Ni–30Fe austenitic alloy revealed that the deformation temperature has a strong effect on the nature of the intragranular defects. There was a transition temperature below which the cell dislocation structure changed to laminar microbands. It appears that the extreme refinement of ferrite is due to the formation of extensive high angle intragranular defects at these low deformation temperatures that then act as sites for static transformation. Language eng DOI 10.1016/j.actamat.2007.05.024 Field of Research 091207 Metals and Alloy Materials Socio Economic Objective 970109 Expanding Knowledge in Engineering HERDC Research category C1 Refereed article in a scholarly journal Copyright notice ©2007, Elsevier Persistent URL http://hdl.handle.net/10536/DRO/DU:30007133 Document type: Journal Article Collections: Centre for Material and Fibre Innovation GTP Research 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 Feb 2009, 15:08:33 EST Wed, 30 Sep 2009, 15:53:46 EST Mon, 16 Jun 2014, 08:26:09 EST Fri, 17 Oct 2014, 08:51:39 EST Tue, 10 May 2016, 09:08:14 EST Filtered Full Citation counts:   Cited 46 times in TR Web of Science Cited 51 times in Scopus Search Google Scholar Access Statistics: 1035 Abstract Views, 0 File Downloads  -  Detailed Statistics Created: Mon, 29 Sep 2008, 08:48:40 EST

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