Irradiation hardening and microstructaral evolution in Fe-Cu model aloys

Takeshi Kitao, Ryuta Kasada, Akihiko Kimura, Hayato Nakata, Kouji Fukuya, Hideki Matsui, Minoru Narui

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


Irradiation hardening and microstructural evolution under neutron and electron irradiation have been investigated for pure-Fe and Fe-Cu model alloys. Neutron and electron irradiations were performed in the Japan Material Test Reactor (JMTR) and with using Phodtron electron accelerator at about 290°C and 270±30°C, respectively. Irradiation hardening of pure-Fe and Fe-Cu model alloys is saturated at about 1 × 10-3 dpa in both the neutron and electron irradiation. Irradiation hardening recovered in two temperature ranges. The recovery in the lower temperature range depends on copper concentration and electron irradiation dose, while the recovery at a higher temperature range does not. Recovery behavior of the irradiation hardening suggests indirectly that copper atoms suppress the growth of interstitial clusters. The recovery behavior of positron lifetime does not coincide with that of the hardness, suggesting that the vacancy clusters are not the direct main factor controlling the hardening by matrix damages. irradiation hardening, matrix defect, copper-rich.

Original languageEnglish
Pages (from-to)365-375
Number of pages11
JournalASTM Special Technical Publication
Issue number1447
Publication statusPublished - 2004
EventEffects of Radiation on Materials: 21st International Symposium - Tucson, AZ, United States
Duration: 2002 Jun 182002 Jun 20


  • Electron irradiation
  • Fe-Cu model alloys
  • Neutron irradiation
  • Post-irradiation annealing
  • Precipitate
  • Vacancy cluster


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