Modeling of microstructure evolution and mechanical property change of reduced-activation martensitic steel during varying-temperature irradiation

R. Kasada, A. Kimura

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The effects of varying-temperature irradiation on mechanical properties and microstructure of reduced-activation 9Cr martensitic steels (RAMS) were investigated by means of micro-Vickers hardness tests and positron annihilation lifetime spectrometry. In case of stepwise increasing-temperature irradiation of 473/623 K, irradiation hardening accumulated at the lower temperature still existed after the elevation in temperature, while in case of the 493/693 K varying irradiation, the low temperature irradiation hardening disappeared after the elevation in irradiation temperature. In both the varying-temperature irradiations, it was observed that microvoids disappeared after the elevation in irradiation temperature. Result of a computer simulation of the evolution of defect clusters using rate theory were in good agreement with the experimental results when I-clusters were considered to be a factor controlling irradiation hardening.

Original languageEnglish
Pages (from-to)188-192
Number of pages5
JournalJournal of Nuclear Materials
Volume283-287
Issue numberPART I
DOIs
Publication statusPublished - 2000 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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