Effect of cobalt on the aging kinetics and the properties of a CuCoNiBe alloy

Atapek S. H.

MATERIALS TESTING, vol.57, no.1, pp.17-21, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 57 Issue: 1
  • Publication Date: 2015
  • Doi Number: 10.3139/120.110669
  • Title of Journal : MATERIALS TESTING
  • Page Numbers: pp.17-21


In this study, the effect of cobalt on the aging kinetics of a precipitation hardening CuCoNiBe alloy was studied by variations in hardness and electrical conductivity. Based on the linear relationship between electrical conductivity and volume fraction of the precipitates, phase transformation kinetics of the alloys having different cobalt contents were formulated using the Avrami equation. It was concluded that (i) aging kinetics slowed down in high cobalt alloyed copper alloy, (ii) the calculated electrical conductivity values using Avrami equation were in good agreement with the experimental data, and (iii) aged alloys had higher hardness and electrical conductivity than the as-cast ones.