ANISOTROPY IN THE MECHANICAL PROPERTIES OF POTASSIUM AND RHENIUM DOPED TUNGSTEN ALLOY PLATES FOR FUSION REACTOR APPLICATIONS

The effects of K-bubble dispersion and 3 wt.% Re addition on the tensile properties and their anisotropy in W were investigated in this work. K-doped W and K-doped W-3%Re showed similar to 45 and similar to 65% higher tensile strengths than pure W, respectively. The ultimate tensile strength and its temperature dependence in pure W, K-doped W, and K-doped W-3%Re showed anisotropy. However, the effects of K-bubble dispersion and 3% Re addition on the anisotropic tensile strength were not clearly observed. K-doped W and K-doped W-3%Re showed better deformation abilities than pure W K-doped W-3%Re showed better tensile properties than pure W under non-irradiation conditions used in this work. Since irradiation hardening is suppressed by adding 3% Re, K-doped W-3%Re is expected to be more advantageous as a plasma facing material in a fusion reactor than pure W and K-doped W