Depth-dependent nanoindentation hardness of reduced-activation ferritic steels after MeV Fe-ion irradiation

Ryuta Kasada, Satoshi Konishi, Kiyohiro Yabuuchi, Shuhei Nogami, Masami Ando, Dai Hamaguchi, Hiroyasu Tanigawa

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The irradiation hardening behavior of F82H reduced-activation ferritic steels after MeV Fe-ion beam irradiation experiments was investigated with a nanoindentation test. Two sets of ion-irradiation experiments were conducted at 270 °C with 10.5 MeV Fe3+ ions up to 5 dpa at a 1000 nm depth at TIARA facility and at 290 °C with 6.4 MeV Fe3+ ions up to 3 dpa at a 600 nm depth at DuET facility, respectively. The measured nanoindentation hardness was converted to the depth-dependent bulk-equivalent hardness based on a combination of the Nix-Gao model to explain the indentation size effect and the film/substrate model to explain the damage gradient effect in the ion-irradiated region and softer substrate effect of the non-irradiated region beyond the irradiated depth range.

Original languageEnglish
Pages (from-to)1637-1641
Number of pages5
JournalFusion Engineering and Design
Volume89
Issue number7-8
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • Ion irradiation
  • Irradiation hardening
  • Nanoindentation
  • Reduced-activation ferritic steel

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Civil and Structural Engineering
  • Mechanical Engineering

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