Simulation of dislocation damping spectra associated with the collective motion of point defects and kink chain subjected to bulk segregation

Ogurtani T., Gungor M., Oren E.

JOURNAL OF APPLIED PHYSICS, vol.91, no.4, pp.1860-1870, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 91 Issue: 4
  • Publication Date: 2002
  • Doi Number: 10.1063/1.1429769
  • Journal Name: JOURNAL OF APPLIED PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1860-1870
  • Middle East Technical University Affiliated: No

Abstract

A theory of interactive and completely coupled systems of dislocations and mobile point defects is presented. The computer simulations yield an accurate prediction of experimental spectral data in terms of dislocation induced Cottrell relaxation and its gradual conversion into a Cottrell-Koster relaxation peak at high concentrations of spherical point defect. The bulk segregation of point defects to the kinked-dislocation line is also accounted for. Excellent results are obtained in computer simulations of aging, peaking, and finally the stabilization behavior of transient dislocation damping peaks. (C) 2002 American Institute of Physics.