Effect of isothermal annealing on the Bordoni relaxation in cold worked copper

Siddiqui R., Alp T.

Journal of Materials Science, vol.26, no.23, pp.6362-6372, 1991 (Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 26 Issue: 23
  • Publication Date: 1991
  • Doi Number: 10.1007/bf02387816
  • Journal Name: Journal of Materials Science
  • Journal Indexes: Scopus
  • Page Numbers: pp.6362-6372
  • Istanbul Medipol University Affiliated: No


The Bordoni relaxation in ultra-purity cold worked copper subsequent to isothermal annealing in the temperature range 298-423 K at 700 Hz frequency is investigated using a set up based on the electrostatic system. The Bordoni peak is observed at 79±2 K. The annealing characteristics of the Bordoni peak are found to be of complex nature. The decay and subsequent regrowth of the peak following annealing above room temperature are interpreted in terms of defects diffusing to dislocations and their removal from dislocations, respectively. The calculated activation energy values for the first decrease (0.55 eV), first increase (0.24 eV) and first minimum (0.27 eV) are in good agreement with the activation energies for interstitial and divacancy diffusion estimated by different workers. The activation energy for divacancy diffusion is computed to be 0.49 eV. © 1991 Chapman & Hall.