Ensembles of gliding grain boundary dislocations in ultrafine grained materials produced by severe plastic deformation
AA Nazarov - Scripta materialia, 1997 - osti.gov
Severe plastic deformation which is now widely used to produce an ultrafine grained (UFG)
structure in metals and alloys necessarily leads to the accumulation of interfacial …
structure in metals and alloys necessarily leads to the accumulation of interfacial …
Dense dispersed shear bands in gradient-structured Ni
During tensile deformation, nanostructured (NS) metals often fail soon after yielding by
forming a localized shear band. Here we report the observation of high density of shear …
forming a localized shear band. Here we report the observation of high density of shear …
Twinning-assisted dynamic adjustment of grain boundary mobility
Grain boundary (GB) plasticity dominates the mechanical behaviours of nanocrystalline
materials. Under mechanical loading, GB configuration and its local deformation geometry …
materials. Under mechanical loading, GB configuration and its local deformation geometry …
Gradient nanostructured steel with superior tensile plasticity
Nanostructured metallic materials with abundant high-angle grain boundaries exhibit high
strength and good radiation resistance. While the nanoscale grains induce high strength …
strength and good radiation resistance. While the nanoscale grains induce high strength …
Nonequilibrium grain boundaries in bulk nanostructured metals and their recovery under the influences of heating and cyclic deformation
AA Nazarov - Letters on materials, 2018 - lettersonmaterials.com
Extrinsic grain boundary dislocations (EGBDs) are formed in grain boundaries during plastic
deformation of polycrystals EGBDs cause a nonequilibrium structure of grain boundaries …
deformation of polycrystals EGBDs cause a nonequilibrium structure of grain boundaries …
Strain gradient plasticity in gradient structured metals
Structural gradients in metallic materials can give rise to substantial extra strengths
compared to their non-gradient counterparts. This strengthening effect originates from the …
compared to their non-gradient counterparts. This strengthening effect originates from the …
High-strength nanocrystalline intermetallics with room temperature deformability enabled by nanometer thick grain boundaries
Although intermetallics are attractive for their high strength, many of them are often brittle at
room temperature, thereby severely limiting their potential as structural materials. Here, we …
room temperature, thereby severely limiting their potential as structural materials. Here, we …
A unified framework for polycrystal plasticity with grain boundary evolution
Plastic deformation in polycrystals is governed by the interplay between intra-granular slip
and grain boundary-mediated plasticity. However, while the role played by bulk dislocations …
and grain boundary-mediated plasticity. However, while the role played by bulk dislocations …
Martensitic transformation dominated tensile plastic deformation of nanograins in a gradient nanostructured 316L stainless steel
TH Fang, NR Tao - Acta Materialia, 2023 - Elsevier
We systematically investigated the tensile deformation mechanisms and mechanical
properties of a gradient nanograined AISI 316 L stainless steel prepared by means of …
properties of a gradient nanograined AISI 316 L stainless steel prepared by means of …
Enhanced strain-rate sensitivity in fcc nanocrystals due to grain-boundary diffusion and sliding
Recent experiments on face-centered cubic (fcc) and hexagonal close packed (hcp)
nanocrystalline metals reported an increase of more than 10-fold in strain-rate sensitivity in …
nanocrystalline metals reported an increase of more than 10-fold in strain-rate sensitivity in …