Precipitation of solid transmutation elements in irradiated tungsten alloys

Takashi Tanno, Akira Hasegawa, Mitsuhiro Fujiwara, Jian Chao He, Shuhei Nogami, Manabu Satou, Toetsu Shishido, Katsunori Abe

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

Tungsten-based model alloys were fabricated to simulate compositional changes by neutron irradiation, performed in the JOYO fast test reactor. The irradiation damage range was 0.17-1.54 dpa and irradiation temperatures were 400, 500 and 750°C. After irradiation, microstructural observations and electrical resistivity measurements were carried out. A number of precipitates were observed after 1.54 dpa irradiation. Rhenium and osmium were precipitated by irradiation, which suppressed the formation of dislocation loops and voids. Structures induced by irradiation were not observed so much after 0.17 dpa irradiation. Electrical resistivity measurements showed that the effects of osmium on the electrical resistivity, related to impurity solution content, were larger than that of rhenium. Measurements of electrical resistivity of ternary alloys showed that the precipitation behavior was similar to that in binary alloys.

Original languageEnglish
Pages (from-to)2259-2264
Number of pages6
JournalMaterials Transactions
Volume49
Issue number10
DOIs
Publication statusPublished - 2008 Oct

Keywords

  • Composition change
  • Electrical resistivity
  • Neutron irradiation
  • Precipitation
  • Solid transmutation element
  • Tungsten

ASJC Scopus subject areas

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

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