Evolution of strain-induced precipitates in a model austenitic Fe-30Ni-Nb steel and their effect on the flow behaviour Poddar, Debasis, Cizek, Pavel, Beladi, Hossein and Hodgson, Peter D 2014, Evolution of strain-induced precipitates in a model austenitic Fe-30Ni-Nb steel and their effect on the flow behaviour, Acta Materialia, vol. 80, pp. 1-15, doi: 10.1016/j.actamat.2014.07.035. Attached Files Name Description MIMEType Size Downloads Title Evolution of strain-induced precipitates in a model austenitic Fe-30Ni-Nb steel and their effect on the flow behaviour Author(s) Poddar, Debasis Cizek, Pavel Beladi, Hossein orcid.org/0000-0003-0131-707X Hodgson, Peter D Journal name Acta Materialia Volume number 80 Start page 1 End page 15 Total pages 15 Publisher Elsevier Place of publication Amsterdam, The Netherlands Publication date 2014 ISSN 1359-6454 Keyword(s) Austenitic steel Dislocation boundaries Hot compression Strain-induced precipitation Transmission electron microscopy Science & Technology Technology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science MICROALLOYED AUSTENITE HOT DEFORMATION RECRYSTALLIZATION NB KINETICS N) CRYSTALLOGRAPHY DISLOCATIONS MECHANISM ALLOYS Summary The present work investigated the evolution of strain-induced NbC precipitates in a model austenitic Fe-30Ni-Nb steel deformed at 925 °C to a strain of 0.2 during post-deformation holding between 3 and 1000 s and their effect on the reloading flow stress. The precipitate particles preferentially nucleated on the nodes of the periodic dislocation networks constituting microband walls. Holding for 10 s resulted in the formation of fine, largely coherent NbC particles with a mean diameter of ∼5 nm, which displayed a cube-on-cube orientation relationship with austenite and caused the maximum increase in the reloading steady-state flow stress. A further increase in the holding time from 30 to 1000 s led to the formation of semi-coherent, gradually coarser and more widely spaced particles with a mean diameter of 8 nm and above, which led to a gradual decrease in the reloading steady-state flow stress. The holding time increase resulted in progressive disintegration of the dislocation substructure and dislocation annihilation through static recovery processes, which was also reflected by the measured softening fractions. The precipitate particle shape changed during post-deformation annealing from elliptical to faceted octahedral and subsequently to tetra-kai-decahedral. © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. Language eng DOI 10.1016/j.actamat.2014.07.035 Field of Research 091207 Metals and Alloy Materials Socio Economic Objective 861206 Structural Metal Products HERDC Research category C1 Refereed article in a scholarly journal ERA Research output type C Journal article Copyright notice ©2014, Elsevier Persistent URL http://hdl.handle.net/10536/DRO/DU:30068129 Document type: Journal Article Collection: Institute for Frontier Materials Related Links Link Description Connect to published version 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 Tue, 09 Dec 2014, 14:01:11 EST Mon, 02 Feb 2015, 09:57:43 EST Mon, 02 Feb 2015, 09:58:15 EST Mon, 02 Feb 2015, 13:15:46 EST Tue, 17 Feb 2015, 13:09:11 EST Tue, 17 Feb 2015, 13:11:23 EST Tue, 17 Feb 2015, 13:15:36 EST Fri, 27 Feb 2015, 13:35:10 EST Mon, 23 Mar 2015, 13:21:48 EST Tue, 21 Apr 2015, 06:06:35 EST Thu, 23 Apr 2015, 12:31:05 EST Fri, 29 May 2015, 14:06:24 EST Tue, 13 Feb 2018, 10:43:50 EST Filtered Full Citation counts:   Cited 20 times in TR Web of Science Cited 21 times in Scopus Search Google Scholar Access Statistics: 284 Abstract Views, 2 File Downloads  -  Detailed Statistics Created: Fri, 27 Feb 2015, 13:35:10 EST

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