title: Dynamical Models of Plasticity with Nonmonotonic Deformation Curves for Nanomaterials
metadata.name: dc.contributor.author
metadata.value: Selyutina, Nina
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Borodin, Elijah
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Petrov, Yuri
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2022-11-26T19:43:51Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2022-11-26T19:43:51Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2022-11
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/38616
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Nanomaterials are widely used in different fields, such as microelectronics, industry, and
  nanocomposites, and they can exhibit unstable deformation behaviour depending on the strain
  rates. Under strain rates of 10^-4–10^-1 s^-1, the deformation of nanomaterials, unlike the quasi-static
  deformation of micromaterials, is characterized by the presence of the rate sensitivity as a possible
  scale phenomenon in dynamic plasticity. In this paper, the relaxation model of plasticity for the
  prediction of deformation curves at different strain rates is used. It allows us to comprehensively
  study the effects of strain hardening in a wide range of deformation conditions for coarse-grained
  materials and nanomaterials. Considering the plastic deformation of the nanosized samples in
  the early stages, dynamical softening, associated with a generation of new defects, and dynamic
  hardening, are crucial. The proposed model, using one parameter or the classical hardening law as
  an example of nanosized gold whisker crystals, tungsten single-crystal pillars, and single-crystalline
  Au-Ag alloy nanowires, is verified. Calculated sets of parameters of characteristic time, as a parameter
  of rate sensitivity of a material, and hardening parameters for different nanomaterials are compared.
  It is shown that the characteristic relaxation times for the single-crystal nanomaterials (10^0–10^3 s) are
  greater than for the nanostructured materials (10^-6–10^-4 s). Despite the manifestation of dynamics
  at different strain rates of nanomaterials, single crystal and nanostructured materials, the proposed
  model can be successfully applied to materials with different degrees of hardening or softening.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Dynamical Models of Plasticity with Nonmonotonic Deformation Curves for Nanomaterials
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 2022 metals-12-01835.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/38616/1/2022%20metals-12-01835.pdf
resources.format: Adobe PDF
resources.size: 2,02 MB