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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 paper is closed access until 16th March 2018.
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:Closed Access (Mechanical, Electrical and Manufacturing Engineering)

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