TY - JOUR
T1 - Yield strength of nanocrystalline materials under high-rate plastic deformation
AU - Borodin, E. N.
AU - Mayer, A. E.
PY - 2012/4/1
Y1 - 2012/4/1
N2 - A high-rate plastic deformation of fine-grained materials has been considered as a result of competing processes of dislocation gliding in the grains and grain-boundary sliding. A structural model has been proposed for describing the grain-boundary sliding as a dominant mechanism of plasticity of nanocrystalline metals. The dependence of the yield strength on the material properties, temperature, and deformation rate has been studied numerically. For the adequate description of the experimental data and molecular dynamics calculations, it is necessary to take into account two parameters, namely, the barrier stress, which is dependent on the elastic constants of a material, and the boundary viscosity, which is substantially dependent on temperature.
AB - A high-rate plastic deformation of fine-grained materials has been considered as a result of competing processes of dislocation gliding in the grains and grain-boundary sliding. A structural model has been proposed for describing the grain-boundary sliding as a dominant mechanism of plasticity of nanocrystalline metals. The dependence of the yield strength on the material properties, temperature, and deformation rate has been studied numerically. For the adequate description of the experimental data and molecular dynamics calculations, it is necessary to take into account two parameters, namely, the barrier stress, which is dependent on the elastic constants of a material, and the boundary viscosity, which is substantially dependent on temperature.
UR - http://www.scopus.com/inward/record.url?scp=84859845463&partnerID=8YFLogxK
U2 - 10.1134/S1063783412040038
DO - 10.1134/S1063783412040038
M3 - Article
AN - SCOPUS:84859845463
SN - 1063-7834
VL - 54
SP - 808
EP - 815
JO - Physics of the Solid State
JF - Physics of the Solid State
IS - 4
ER -