Effect of microstructural anisotropy on the mechanical properties of K-doped tungsten rods for plasma facing components

Shuhei Nogami, Wenhai Guan, Makoto Fukuda, Akira Hasegawa

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The effect of microstructural anisotropy in pure tungsten (W) and potassium (K) doped W rods (20 mm in diameter) on their mechanical properties was investigated by tensile tests along the axial and radial directions at temperatures from 473 K to 1573 K and fracture analysis. K-doping led to improved tensile strength regardless of the test direction and temperature. K-doping did not alter the elongation regardless of the test direction in the temperature range showing ductile fracture. The ductility at lower temperature range was improved by the K-doping, especially in tensile tests along the radial direction. The lowest temperature of ductile fracture along both axial and radial directions decreased from 1373 K to 973 K because of K-doping. Thus, K-doping could suppress the influence of microstructural anisotropy on tensile properties, especially ductility, in large diameter W rods.

Original languageEnglish
Pages (from-to)1549-1553
Number of pages5
JournalFusion Engineering and Design
Volume109-111
DOIs
Publication statusPublished - 2016

Keywords

  • Microstructural anisotropy
  • Potassium doping
  • Tensile property
  • Tungsten

ASJC Scopus subject areas

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

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