Tensile properties of K-doped W-3%Re

Makoto Fukuda, Shuhei Nogami, Akira Hasegawa, Hiroshi Usami, Kiyohiro Yabuuchi, Takeo Muroga

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

In this work, the tensile properties of K-doped W-3%Re were investigated. This material was fabricated by powder metallurgy and hot rolling on an industrial scale. It is expected that there would be improvement of the high-temperature strength, an increase of the recrystallization temperature, and a decrease in the ductile-brittle transition temperature (DBTT) of pure tungsten due to the dispersion of K bubbles and the addition of 3% Re. In addition, suppression of the formation of irradiation-induced defect clusters is also expected. Tensile tests in the temperature range from room temperature to 1800 °C were conducted. After the tensile tests, fracture surface observations were carried out using a scanning electron microscope (SEM). The tensile strength decreased with increasing test temperature. Elongation of K-doped W-3%Re was observed above 500 °C. The results of fracture surface observation showed that delamination of the layered structure occurred at 500, 700, and 900 °C and cracking along the grain boundaries occurred at 1500 and 1800 °C.

Original languageEnglish
Pages (from-to)1033-1036
Number of pages4
JournalFusion Engineering and Design
Volume89
Issue number7-8
DOIs
Publication statusPublished - 2014 Oct

Keywords

  • Fracture manner
  • K-doped W-3%Re
  • Tensile property

ASJC Scopus subject areas

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

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