Ion-irradiation hardening of brazed joints of tungsten and oxide dispersion strengthened (ODS) ferritic steel

Y. Himei, Kiyohiro Yabuuchi, R. Kasada, S. Noh, H. Noto, T. Nagasaka, S. Nogami, A. Kimura

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Irradiation hardening and microstructural change of the brazed-joint of W and oxide dispersion strengthened ferritic steel (ODS-FS was investigated by nano-indentation hardness test and transmission electron microscopy after ion irradiation with 6.4MeV Fe3+ ions at 500°C up to 10 dpa. Dual-beam irradiation of Fe3+ ions and energy-degraded 1MeV He+ ion was also carried out. A considerable irradiation hardening occurred in the W base metal where dislocation loops and nano-scaled voids or He-bubbles were observed. Dual-beam irradiation enhanced the hardening. No significant hardening was observed in ODS-FS. The hardness of insert material was reduced after irradiation, which is due to the recovery of dislocations generated during joining process.

Original languageEnglish
Pages (from-to)446-450
Number of pages5
JournalMaterials Transactions
Volume54
Issue number4
DOIs
Publication statusPublished - 2013 Apr 8

Keywords

  • Hardening mechanism
  • Helium-implantation
  • Ion-irradiation
  • Tungsten and oxide dispersion strengthened (W/ODS steel joint

ASJC Scopus subject areas

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

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