Effect of strain rate on the formation of a dislocation structure in a dispersion-hardened alloy with incoherent nanosized particles
A study was made of the influence of the strain rate on the change in the densities of the components of the dislocation subsystem in dispersion-hardened materials with different scale characteristics of the strengthening phase in a wide temperature range. The study was carried out by methods of mathematical modeling. It is shown that the plastic shear rate of heterophase alloys with incoherent nanosized particles affects the formation of dipole dislocation structures and, consequently, the hardening of the material. It was found that in a material with the smallest particles at high temperatures, dipoles do not appear in the composition of the dislocation structure at any strain rates. It is shown that during plastic deformation the density of shear-forming dislocations is higher than the density of dislocations in prismatic loops at all temperatures and strain rates in materials with strengthening particles of various sizes.
Keywords
mathematical modeling,
plastic deformation rate,
dispersion-hardened materials,
nanosized particles,
dislocation densityAuthors
| Daneyko O.I. | Tomsk State University of Architecture and Building; National Research Tomsk State University | olya_dan@mail.ru |
| Kovalevskaya T.A. | Tomsk State University of Architecture and Building | takov47@mail.ru |
Всего: 2
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