Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4921382 | Fusion Engineering and Design | 2016 | 5 Pages |
Abstract
The effect of microstructural anisotropy in pure tungsten (W) and potassium (K) doped W rods (20Â mm in diameter) on their mechanical properties was investigated by tensile tests along the axial and radial directions at temperatures from 473Â K to 1573Â 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 1373Â K to 973Â 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.
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Authors
Shuhei Nogami, Wenhai Guan, Makoto Fukuda, Akira Hasegawa,