Local lattice instability analysis on mode I crack tip in hcp-Mg: Unstable mode for crack propagation vs. dislocation emission
Sign Up to like & getrecommendations! Published in 2017 at "Computational Materials Science"
DOI: 10.1016/j.commatsci.2017.02.004
Abstract: Abstract As a series study discussing local deformation by the atomic elastic stiffness, B ij α = Δ σ i α / Δ e j , various molecular dynamics simulations are performed on the basal,… read more here.
Keywords: crack tip; mode crack; dislocation emission; crack ... See more keywords
The shock response of crystalline Ni with H-free and H-segregated 〈1 1 0〉 symmetric tilt GBs
Sign Up to like & getrecommendations! Published in 2018 at "Computational Materials Science"
DOI: 10.1016/j.commatsci.2018.02.030
Abstract: Abstract The shock responses of crystalline Ni with two types of symmetric tilt grain boundaries (STGBs) are studied by large-scale molecular dynamics simulations, with special concerns on the effect of hydrogen segregated STGBs on them.… read more here.
Keywords: dislocation emission; symmetric tilt; segregated stgbs; crystalline ... See more keywords
Effect of nanotwin and dislocation pileup at twin boundary on dislocation emission from a semi-elliptical blunt crack tip in nanocrystalline materials
Sign Up to like & getrecommendations! Published in 2018 at "Engineering Fracture Mechanics"
DOI: 10.1016/j.engfracmech.2018.09.025
Abstract: Abstract The effects of the nanotwin and dislocation pileup at the twin boundary on lattice dislocation emission from a surface semi-elliptical blunt crack in deformed nanocrystalline materials (NCMs) are investigated. The nanotwin as a stress… read more here.
Keywords: dislocation pileup; dislocation emission; dislocation; blunt crack ... See more keywords
Enhanced ductility of nanomaterials through cooperative dislocation emission from cracks and grain boundaries
Sign Up to like & getrecommendations! Published in 2020 at "International Journal of Mechanical Sciences"
DOI: 10.1016/j.ijmecsci.2020.105652
Abstract: Abstract An analytical model is established to explore the cooperative mechanism between the dislocation emission from cracks and grain boundaries driven by grain boundary sliding in deformed nanocrystalline materials. In our model, high local stress… read more here.
Keywords: grain boundary; grain boundaries; dislocation emission; emission ... See more keywords
Effects of Ag and Zr solutes on dislocation emission from Σ11(332)[110] symmetric tilt grain boundaries in Cu: Bigger is not always better
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Plasticity"
DOI: 10.1016/j.ijplas.2018.05.009
Abstract: Abstract Solute additions are commonly used to stabilize nanocrystalline materials against grain growth, and can simultaneously enhance the strength of the material by impeding dislocation emission from the grain boundaries. In this study we demonstrate… read more here.
Keywords: dislocation emission; solutes dislocation; dislocation; grain boundaries ... See more keywords