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Influence of grain size distribution on the mechanical behavior of materials in a wide range of strain rates N. V. Skripnyak, E. G. Skripnyak, V. V. Skripnyak, V. A. Skripnyak

Contributor(s): Skripnyak, Evgeniya G | Skripnyak, Vladimir V | Skripnyak, Vladimir A | Skripnyak, Nataliya VMaterial type: ArticleArticleSubject(s): деформации | механическое поведение | магниево-алюминиевые сплавы | крупнозернистые сплавыGenre/Form: статьи в сборниках Online resources: Click here to access online In: M2D2017 : proceedings of the 7th International Conference on Mechanics and Materials in Design (Albufeira/Portugal, 11-15 June 2017) P. 1749-1762Abstract: This work compares the mechanical behavior of alloys with influence of grain size distribution on the in a wide range of strain rates. Constitutive model was proposed for describing the inelastic deformation and damage of alloys with face centered cubic and hexagonal close packed structures and distribution of grain sizes. It was shown that the dependences of the yield stress on logarithm of normalized strain rate for aluminium and magnesium alloys with a bimodal distribution of grains and coarse-grained alloys are similar. The yield stress at room temperature of the magnesium and aluminium alloy increased on 10 - 15 % in comparison with a coarse-grained alloy if the volume fracture of the UFG grains is close to the percolation threshold.
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Библиогр.: 46 назв.

This work compares the mechanical behavior of alloys with influence of grain size
distribution on the in a wide range of strain rates. Constitutive model was proposed for
describing the inelastic deformation and damage of alloys with face centered cubic and
hexagonal close packed structures and distribution of grain sizes. It was shown that the
dependences of the yield stress on logarithm of normalized strain rate for aluminium and
magnesium alloys with a bimodal distribution of grains and coarse-grained alloys are similar.
The yield stress at room temperature of the magnesium and aluminium alloy increased on 10 -
15 % in comparison with a coarse-grained alloy if the volume fracture of the UFG grains is
close to the percolation threshold.

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