Irradiation-induced defects and Cu precipitates in ternary Fe-based model alloys for nuclear reactor pressure vessel steels studied by positron annihilation and 3D atom probe

T. Toyama, Y. Nagai, Z. Tang, M. Hasegawa, T. Ohkubo, K. Hono

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Positron annihilation and three dimensional (3D) atom probe techniques are employed to study irradiation-induced defects and ultrafine Cu precipitates in model alloys for nuclear reactor pressure vessel (RPV) steels, Fe-0.3Cu-0.7Ni and Fe-0.3Cu-1.5Mn after irradiation by 3MeV electrons. The coincidence Doppler broadening (CDB) and positron lifetime clearly showed the vacancy-multi Cu atom complexes for all the alloys after irradiation. Positron annihilation revealed that the vacancies anneal out but Cu atoms aggregate to the ultrafme Cu precipitates by post-irradiation annealing at 400°C. The 3D atom probe also shows the Cu precipitate, but no enrichment of Ni or Mn atoms therein, which is consistent with the results of positron annihilation.

Original languageEnglish
Title of host publicationPositron Annihilation
Subtitle of host publicationProceedings of the 13th International Conference on Positron Annihilation, ICPA-13
EditorsToshio Hyodo, Haruo Saito, Yoshinori Kobayashi, Yasuyuki Nagashima
PublisherTrans Tech Publications Ltd
Pages195-197
Number of pages3
ISBN (Print)9780878499366
DOIs
Publication statusPublished - 2004 Jan 1
EventPositron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13 - Kyoto, Japan
Duration: 2003 Sep 72003 Sep 12

Publication series

NameMaterials Science Forum
Volume445-446
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

OtherPositron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13
CountryJapan
CityKyoto
Period03/9/703/9/12

Keywords

  • Irradiation Effects
  • Irradiation-Enhanced Precipitation
  • Nuclear Reactor Pressure Vessel Steels
  • Positron Annihilation
  • Three-Dimensional Atom Probe

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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