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 …
Plasticity of bcc micropillars controlled by competition between dislocation multiplication and depletion
Recent micropillar experiments have shown strong size effects at small pillar diameters. This
“smaller is stronger” phenomenon is widely believed to involve dislocation motion, which …
“smaller is stronger” phenomenon is widely believed to involve dislocation motion, which …
Microstructure versus Size: Mechanical Properties<? format?> of Electroplated Single Crystalline Cu Nanopillars
We report results of uniaxial compression experiments on single-crystalline Cu nanopillars
with nonzero initial dislocation densities produced without focused ion beam (FIB) …
with nonzero initial dislocation densities produced without focused ion beam (FIB) …
Temperature and strain-rate dependence of surface dislocation nucleation
Dislocation nucleation is essential to the plastic deformation of small-volume crystalline
solids. The free surface may act as an effective source of dislocations to initiate and sustain …
solids. The free surface may act as an effective source of dislocations to initiate and sustain …
Mechanical response of freestanding Au nanopillars under compression
We employ molecular dynamics simulations of defect-free nanopillars with realistic
cylindrical geometries to obtain an atomic-level picture of their deformation behavior under …
cylindrical geometries to obtain an atomic-level picture of their deformation behavior under …
Uniaxial compression of fcc Au nanopillars on an MgO substrate: The effects of prestraining and annealing
The size-dependent strength of face-centered cubic (fcc) metals, as revealed by uniaxial
compression of nanopillars, suggests that plasticity is dislocation source-controlled, with …
compression of nanopillars, suggests that plasticity is dislocation source-controlled, with …
Obstacles and sources in dislocation dynamics: Strengthening and statistics of abrupt plastic events in nanopillar compression
Mechanical deformation of nanopillars displays features that are distinctly different from the
bulk behavior of single crystals: Yield strength increases with decreasing size and plastic …
bulk behavior of single crystals: Yield strength increases with decreasing size and plastic …
Strain rate effects on the mechanical response in multi-and single-crystalline Cu micropillars: Grain boundary effects
JY Zhang, G Liu, J Sun - International Journal of Plasticity, 2013 - Elsevier
Homogeneous interfaces like grain boundaries (GBs) play an important role in crystalline
plasticity as they often serve as obstacles for dislocation motion, as well as dislocation …
plasticity as they often serve as obstacles for dislocation motion, as well as dislocation …
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 …
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 …