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Title: Enhanced gradient crystal-plasticity study of size effects in a β-titanium alloy
Authors: Demiral, Murat
Nowag, Kai
Roy, Anish
Ghisleni, Rudy
Michler, Johann
Silberschmidt, Vadim V.
Keywords: Strain gradient plasticity
Size effect
Single crystal
Titanium alloy
Micropillar compression
Issue Date: 2017
Publisher: © IOP Publishing
Citation: DEMIRAL, M. ... et al, 2017. Enhanced gradient crystal-plasticity study of size effects in a β-titanium alloy. Modelling and Simulation in Materials Science and Engineering, 25 (3), 035013.
Abstract: A calibrated model of enhanced strain-gradient crystal plasticity is proposed, which is shown to characterize adequately deformation behaviour of b.c.c. single crystals of a β-Ti alloy (Ti-15-3-3-3). In this model, in addition to strain gradients evolving in the course of deformation, incipient strain gradients, related to a component's surface-to-volume ratio, is accounted for. Predictive capabilities of the model in characterizing a size effect in an initial yield and a work-hardening rate in small-scale components is demonstrated. The characteristic length-scale, i.e. the component's dimensions below which the size effect is observed, was found to depend on densities of polar and statistical dislocations and interaction between them.
Description: This is an author-created, un-copyedited version of an article published in Modelling and Simulation in Materials Science and Engineering. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/1361-651X/aa5ce3.
Sponsor: The research leading to these results received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement No. PITNGA-2008-211536, project MaMiNa.
Version: Accepted for publication
DOI: 10.1088/1361-651X/aa5ce3
URI: https://dspace.lboro.ac.uk/2134/24254
Publisher Link: http://dx.doi.org/10.1088/1361-651X/aa5ce3
ISSN: 0965-0393
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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