Investigation of the hardening of neutron irradiated and thermally aged iron-copper alloys, on the basis of mechanical and magnetic relaxation phenomena

Research output: ThesisDoctoral thesis

Authors

Abstract

The life-time of RPV depends on its resistance against brittle fracture which is influenced by neutron irradiation induced damage during operation. The informations about microscopic properties of irradiation induced defect - in particular Cu-precipitates, their possible interaction with other defects and the full correlation with macroscopic mechanical properties are not yet established. The present work takes a place in an extensive study of the hardening (the main reason for embrittlement) which occurs in RPV steels due to the copper-precipitation. The effect of Cu-precipitation in the dislocation dynamics is studied by relaxation techniques. The results are related to the temperature dependent internal friction and magnetic after-effect spectra of pure Fe and Fe-Cu alloys, with a variety of Cu-precipitation stages, obtained by both thermal aging and neutron irradiation. These results are correlated with the results of the mechanical tests on the same samples.

Details

Original languageEnglish
Awarding Institution
  • UGent - Universiteit Gent
Supervisors/Advisors
Place of PublicationGent, Belgium
Publisher
  • UGent - Universiteit Gent
Print ISBNs978-90-8578-500-2
Publication statusPublished - Apr 2012

Keywords

  • hardening, Fe-Cu, dislocations, carbon, Cu-precipitates

ID: 381874