Demiral, MuratNowag, KaiRoy, AnishGhisleni, RudyMichler, JohannSilberschmidt, Vadim V.2018-09-122018-09-122017Demiral, M...et al. (2017). Enhanced gradient crystal-plasticity study of size effects in a beta-titanium alloy. Modelling and Simulation in Materials Science and Engineering, 25(3). http://dx.doi.org/10.1088/1361-651X/aa5ce30965-0393http://hdl.handle.net/20.500.12416/1713A calibrated model of enhanced strain-gradient crystal plasticity is proposed, which is shown to characterize adequate deformation behaviour of bcc single crystals of a beta-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.eninfo:eu-repo/semantics/closedAccessStrain Gradient PlasticitySize EffectSingle CrystalTitanium AlloyMicropillar CompressionArticle25310.1088/1361-651X/aa5ce3