Interaction of discrete breathers with primary lattice defects in bcc Fe

Research output: Contribution to journalArticle

Authors

Institutes & Expert groups

  • NSC - Kharkov Institute of Physics and Technology
  • IMSP - Institute for Metals Superplasticity Problems
  • NRCKI - National research Center Kurchatov Institute
  • PbPU - Peter the Great St.Petersburg Polytechnic University - Russia

Documents & links

Abstract

The interaction of discrete breathers with the primary lattice defects in transition metals such as vacancy, dislocation, and surface is analyzed on the example of bcc iron employing atomistic simulations. Scattering of discrete breathers on the lattice defects induces localized atomic excitations, with intensity and relaxation time depending on the defect structure and breather kinetic energy. The dissipation of the intrinsic breather energy due to the scattering is computed and analyzed. It is concluded that the breather-to-defect energy transfer may stipulate the activation of the lattice defects causing unexpected athermal effects such as enhanced mass transfer or electroplasticity, already experimentally reported but so far not fully understood at the atomic-scale level.

Details

Original languageEnglish
Article number085007
JournalModelling and Simulation in Materials Science and Engineering
Volume23
Issue number8
DOIs
Publication statusPublished - 20 Oct 2015

Keywords

  • discrete breather, bcc lattice, iron, lattice defect, vacancy, dislocation, surface

ID: 3368239