Bimodal Structures of Solids Obtained under Megaplastic Strain


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The evolution of the defect structure of aluminum alloys of different compositions under megaplastic strain at a high quasi-hydrostatic pressure has been studied. The theoretical analysis and numerical calculation of the evolution of the defect structure of solids (metals) under this impact have been performed within the three-defect model of nonequilibrium evolution thermodynamics. The calculation of defect kinetics shows that the presence of coarse grains submerged into a matrix of fine grains at specified parameters and coefficients leads to the additional generation of dislocations and, as a consequence, to the greater dislocation strengthening of a material.

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L. Metlov

Galkin Donetsk Physicotechnical Institute; Donetsk National University

Email: brodova@imp.uran.ru
乌克兰, ul. Rozy Luksemburg 72, Donetsk, 83114; ul. Shestisotletiya 21, Vinnitsa, 21021

I. Brodova

Mikheev Institute of Metal Physics, Ural Branch

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Email: brodova@imp.uran.ru
俄罗斯联邦, ul. Sof’I Kovalevskoi 18, Ekaterinburg, 620137

V. Tkachenko

Galkin Donetsk Physicotechnical Institute

Email: brodova@imp.uran.ru
乌克兰, ul. Rozy Luksemburg 72, Donetsk, 83114

A. Petrova

Mikheev Institute of Metal Physics, Ural Branch

Email: brodova@imp.uran.ru
俄罗斯联邦, ul. Sof’I Kovalevskoi 18, Ekaterinburg, 620137

I. Shirinkina

Mikheev Institute of Metal Physics, Ural Branch

Email: brodova@imp.uran.ru
俄罗斯联邦, ul. Sof’I Kovalevskoi 18, Ekaterinburg, 620137

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