Sensitivity of deformation twinning to grain size in titanium and magnesium Ghaderi, Alireza and Barnett, Matthew R. 2011, Sensitivity of deformation twinning to grain size in titanium and magnesium, Acta materialia, vol. 59, no. 20, pp. 7824-7839, doi: 10.1016/j.actamat.2011.09.018. Attached Files Name Description MIMEType Size Downloads Title Sensitivity of deformation twinning to grain size in titanium and magnesium Author(s) Ghaderi, Alireza orcid.org/0000-0002-6774-9302 Barnett, Matthew R. orcid.org/0000-0001-8287-9044 Journal name Acta materialia Volume number 59 Issue number 20 Start page 7824 End page 7839 Total pages 16 Publisher Elsevier Place of publication Amsterdam, The Netherlands Publication date 2011-12 ISSN 1359-6454 1873-2453 Keyword(s) twinning grain size titanium magnesium Summary The impact of grain size on deformation twinning in commercial purity titanium and magnesium alloy Mg–3Al–1Zn (AZ31) is investigated. Tensile tests were carried out for the titanium samples; compression testing was employed for the magnesium specimens. Average values of the true twin length, true twin thickness and the number density of twins were determined using stereology. A key difference between these two materials is that twinning contributes little to the plastic strain in the titanium while it accounts for nearly all of the early plastic strain in the magnesium. In some respects (e.g. volume fraction and number density) the phenomenology of twinning differed between the two materials, while in others (e.g. twin shape and size) both materials showed a similar response. It is found that in both materials, twins span the entirety of their parent grains only for grain sizes less than ∼30 μm. Both the nucleation density per unit of nucleating interface (i.e. grain and twin boundaries) and the aspect ratio of twins scale with applied stress. The impact of grain size on twin volume fraction is modelled analytically. Language eng DOI 10.1016/j.actamat.2011.09.018 Field of Research 091207 Metals and Alloy Materials Socio Economic Objective 861199 Basic Metal Products (incl. Smelting, Rolling, Drawing and Extruding) not elsewhere classified HERDC Research category C1 Refereed article in a scholarly journal Copyright notice ©2011, Elsevier Persistent URL http://hdl.handle.net/10536/DRO/DU:30044437 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 Wed, 18 Apr 2012, 10:24:21 EST Wed, 18 Apr 2012, 10:25:33 EST Mon, 17 Jun 2013, 17:39:10 EST Mon, 30 Sep 2013, 13:56:11 EST Fri, 13 Jun 2014, 13:53:01 EST Fri, 06 Feb 2015, 10:56:04 EST Filtered Full Citation counts:   Cited 214 times in TR Web of Science Cited 226 times in Scopus Search Google Scholar Access Statistics: 789 Abstract Views, 3 File Downloads  -  Detailed Statistics Created: Wed, 18 Apr 2012, 10:24:02 EST by Leanne Swaneveld

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