Atomistic processes controlling flow stress scaling during compression of nanoscale face-centered-cubic crystals

F Sansoz - Acta Materialia, 2011 - Elsevier
The size dependence of strength observed in submicrometer face-centered-cubic (fcc)
metallic crystals under uniform deformation depends on the interaction of pre-existing …

Effect of surface orientation on the plasticity of small bcc metals

D Kaufmann, AS Schneider, R Moenig… - International Journal of …, 2013 - Elsevier
The basic dislocation processes responsible for plasticity of fcc and bcc metals are
fundamentally different. Dislocation based deformation in fcc metals is not very sensitive to …

Data-driven exploration and continuum modeling of dislocation networks

M Sudmanns, J Bach, D Weygand… - … and Simulation in …, 2020 - iopscience.iop.org
The microstructural origin of strain hardening during plastic deformation in stage II
deformation of face-centered cubic (fcc) metals can be attributed to the increase in …

Intrinsic size dependent plasticity in BCC micro-pillars under uniaxial tension and pure torsion

JD Gravell, W Cai, WD Nix, H Gao - Extreme Mechanics Letters, 2020 - Elsevier
The mechanical behavior of submicron body-centered cubic (BCC) micro-pillars is
investigated by three-dimensional dislocation dynamics (DD) simulations to better …

Theoretical and numerical investigations on confined plasticity in micropillars

Y Cui, Z Liu, Z Zhuang - Journal of the Mechanics and Physics of Solids, 2015 - Elsevier
Multiscale dislocation dynamic simulations are systematically carried out to reveal the
dislocation mechanism controlling the confined plasticity in coated micropillar. It is found that …

A continuum model for dislocation dynamics in three dimensions using the dislocation density potential functions and its application to micro-pillars

Y Zhu, Y Xiang - Journal of the Mechanics and Physics of Solids, 2015 - Elsevier
In this paper, we present a dislocation-density-based three-dimensional continuum model,
where the dislocation substructures are represented by pairs of dislocation density potential …

Microstructural investigation of the hardening mechanism in fcc crystals during high rate deformations

M Yaghoobi, GZ Voyiadjis - Computational Materials Science, 2017 - Elsevier
The present paper studies the hardening mechanism in fcc metallic structures during high
rate deformations by incorporating the dislocation network properties. The large scale …

Microstructural constitutive model for polycrystal viscoplasticity in cold and warm regimes based on continuum dislocation dynamics

SAH Motaman, U Prahl - Journal of the Mechanics and Physics of Solids, 2019 - Elsevier
Viscoplastic flow of polycrystalline metallic materials is the result of motion and interaction of
dislocations, line defects of the crystalline structure. In the microstructural/physics-based …

Mechanical annealing under low-amplitude cyclic loading in micropillars

Y Cui, Z Liu, Z Wang, Z Zhuang - Journal of the Mechanics and Physics of …, 2016 - Elsevier
Mechanical annealing has been demonstrated to be an effective method for decreasing the
overall dislocation density in submicron single crystal. However, simultaneously significant …

Microstructure versus size: nano/microscale deformation of solute-strengthening Al alloys via pillar compression tests

S Yan, H Zhou, QH Qin - Materials Research Letters, 2019 - Taylor & Francis
Effect of solutes, crystal orientation, sample's size, and dislocation density on the
nano/microscale deformation of solute-strengthening Al alloys has been investigated via …