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Enhanced gradient crystal-plasticity study of size effects in a β-titanium alloy

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journal contribution
posted on 01.03.2017, 11:12 by Murat Demiral, Kai Nowag, Anish RoyAnish Roy, Rudy Ghisleni, Johann Michler, Vadim SilberschmidtVadim Silberschmidt
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.

Funding

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.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Modelling and Simulation in Materials Science and Engineering

Volume

25

Issue

3

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.

Publisher

© IOP Publishing

Version

AM (Accepted Manuscript)

Publication date

2017-03-16

Notes

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.

ISSN

0965-0393

eISSN

1361-651X

Language

en