Theoretical and numerical investigations of single arm dislocation source controlled plastic flow in FCC micropillars
The 'dislocation source'controlled plastic behaviors in submicron single crystals, which differ
significantly from macroscopic plastic flow, are widely observed in recent in situ TEM tests. In …
significantly from macroscopic plastic flow, are widely observed in recent in situ TEM tests. In …
Stochastic behaviors in plastic deformation of face-centered cubic micropillars governed by surface nucleation and truncated source operation
Three dimensional dislocation dynamics (DD) simulations are performed to investigate the
governing mechanism of size dependent plastic deformation in submicron face-centered …
governing mechanism of size dependent plastic deformation in submicron face-centered …
The role of the weakest-link mechanism in controlling the plasticity of micropillars
JA El-Awady, M Wen, NM Ghoniem - Journal of the Mechanics and Physics …, 2009 - Elsevier
We present a computational study on the effects of sample size on the strength and plastic
flow characteristics of micropillars under compression loading. We conduct three …
flow characteristics of micropillars under compression loading. We conduct three …
Discrete dislocation simulations of the plasticity of micro-pillars under uniaxial loading
J Senger, D Weygand, P Gumbsch, O Kraft - Scripta Materialia, 2008 - Elsevier
Recent experiments have shown an unexpected strong size effect in uniaxial compression
tests of metallic micro-pillars, such as the flow stress increases with decreasing pillar …
tests of metallic micro-pillars, such as the flow stress increases with decreasing pillar …
Dislocation escape-related size effects in single-crystal micropillars under uniaxial compression
H Tang, KW Schwarz, HD Espinosa - Acta Materialia, 2007 - Elsevier
The size-dependence of the plastic response of single-crystal micropillars at
submicron/micron length scales under compression was investigated using three …
submicron/micron length scales under compression was investigated using three …
Geometrical analysis of 3D dislocation dynamics simulations of FCC micro-pillar plasticity
A geometrical analysis of 3D dislocation dynamics simulations of FCC micro-pillar plasticity
shows that the insertion of jogged dislocations before relaxation or enabling cross-slip …
shows that the insertion of jogged dislocations before relaxation or enabling cross-slip …
Analysis of heterogeneous deformation and dislocation dynamics in single crystal micropillars under compression
The size dependent deformation of Cu single crystal micropillars with thickness ranging from
0.2 to 2.5 μm subjected to uniaxial compression is investigated using a Multi-scale …
0.2 to 2.5 μm subjected to uniaxial compression is investigated using a Multi-scale …
Latent hardening/softening behavior in tension and torsion combined loadings of single crystal FCC micropillars
JD Gravell - Acta Materialia, 2020 - Elsevier
In metallic materials, the activation of one slip system increases the flow strength of other slip
systems, which is phenomenon known as latent hardening. This latent hardening behavior …
systems, which is phenomenon known as latent hardening. This latent hardening behavior …
Interpreting strain burst in micropillar compression through instability of loading system
Understanding the mechanism of intermittent plastic flow in single crystal at micron to nano
scale is vitally important to the fields where the reliability of system is paramount. Jumps in …
scale is vitally important to the fields where the reliability of system is paramount. Jumps in …
Micro-pillar plasticity: 2.5 D mesoscopic simulations
AA Benzerga - Journal of the Mechanics and Physics of Solids, 2009 - Elsevier
The plastic behavior of micro-and nano-scale crystalline pillars is investigated under
nominally uniform compression. The transition from forest hardening to exhaustion …
nominally uniform compression. The transition from forest hardening to exhaustion …