Tensile and impact properties of tungsten-rhenium alloy for plasma-facing components in fusion reactor

Shotaro Watanabe, Shuhei Nogami, Jens Reiser, Michael Rieth, Sven Sickinger, Siegfried Baumgärtner, Takeshi Miyazawa, Akira Hasegawa

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Low temperature brittleness and high ductile-to-brittle transition temperature (DBTT) are potential drawbacks related to the mechanical properties of tungsten (W) for divertor application in fusion reactors. In the present study, to improve the mechanical properties of W, rhenium (Re) addition has been applied as a solid solution alloying method. In this paper, the effects of Re addition on the tensile and Charpy impact properties of W thick plate fabricated by powder metallurgy and hot rolling were investigated, which has enough volume as the plasma facing material and the microstructural uniformity for mass-production. At the temperature below 1000 °C, the W-3%Re showed 5–30% higher strength, 10–35% higher total elongation, 100 °C lower DBTT, and 16% higher upper shelf energy than those of the pure W.

Original languageEnglish
Article number111323
JournalFusion Engineering and Design
Volume148
DOIs
Publication statusPublished - 2019 Nov

Keywords

  • Alloying
  • Charpy impact properties
  • Fusion reactor
  • Recrystallization
  • Rhenium
  • Tensile properties
  • Tungsten

ASJC Scopus subject areas

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

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