High-velocity mass transfer in FCC-metals containing chains of vacancies and interstitial atoms

• Published in: Russian physics journal 2011-08, Vol.54 (3), p.308-313
• Main Authors: Starostenkov, M. D., Markidonov, A. V., Tikhonova, T. A., Potekaev, A. I., Kulagina, V. V.
• Format: Article
• Language: English
• Subjects: Condensed Matter Physics; Hadrons; Heavy Ions; Lasers; Laws, regulations and rules; Mathematical and Computational Physics; Nuclear Physics; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Telecommunication; Theoretical
• ISSN: 1064-8887; 1573-9228
• DOI: 10.1007/s11182-011-9616-1

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  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.