Using the method of molecular dynamics simulations, the dynamics of structure rearrangement in the course of relaxation in a three-dimensional aluminum is investigated via introduction of one-dimensional chains containing equal number of vacancies and interstitial atoms and located in close-packed positions along the <101 > directions. This model represents a starting material structure possessing regions with differing mass densities: m+ and m–. The process of relaxation is shown to proceed via a number of phases: generation of shock waves, nucleation of vortex displacements of atoms, transformation of shock waves into acoustic waves, and correlated high-velocity collective displacements of atoms from interstitial into vacancy positions. The latter displacements are developed at velocities much higher than acoustic velocity.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 3, pp. 42–46, March, 2011.
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Starostenkov, M.D., Markidonov, A.V., Tikhonova, T.A. et al. High-velocity mass transfer in FCC-metals containing chains of vacancies and interstitial atoms. Russ Phys J 54, 308–313 (2011). https://doi.org/10.1007/s11182-011-9616-1
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DOI: https://doi.org/10.1007/s11182-011-9616-1