Fabrication and characterization of W-Re-Os alloys for studying transmutation effects of W in fusion reactors

Jian Chao He, Akira Hasegawa, Mitsuhiro Fujiwara, Manabu Satou, Touetsu Shishido, Katsunori Abe

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Tungsten (W) is a candidate material for plasma-facing components in fusion reactors. Large amounts of solid transmuted elements of W such as Re and Os will be produced under fusion neutron irradiation. In order to investigate the effects of transmutation products, a series of W-Re-Os alloys were fabricated by an arc melting method. The nominal compositions of these samples were selected based on theoretical predictions of changes in chemical composition for the transmutation of W to Re and Os. Significant hardening, an increase in electrical resistivity and changes in the lattice constant were observed as a function of the Re and Os content. Microstructural observations revealed the existence of the ε phase precipitate, which did not significantly affect physical properties and hardness compared with solid solution effect. The main objectives of this work were to demonstrate the processes of material fabrication and to study unirradiated material properties.

Original languageEnglish
Pages (from-to)2657-2660
Number of pages4
JournalMaterials Transactions
Volume45
Issue number8
DOIs
Publication statusPublished - 2004 Aug

Keywords

  • Electrical resistivity
  • Lattice constant
  • Precipitation
  • Solid solution hardening
  • Transmutation products
  • Tungsten

ASJC Scopus subject areas

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

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