Neutron irradiation tolerance of potassium-doped and rhenium-alloyed tungsten
| Autor: | Chao Yin, Gerald Pintsuk, Akira Hasegawa, Shuhei Nogami, Dmitry Terentyev, Michael Rieth, Aleksandr Zinovev |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Nuclear transmutation Metallurgy Doping chemistry.chemical_element 02 engineering and technology Rhenium Tungsten 021001 nanoscience & nanotechnology 01 natural sciences 010305 fluids & plasmas Nuclear Energy and Engineering chemistry Neutron flux Powder metallurgy 0103 physical sciences General Materials Science ddc:620 0210 nano-technology Ductility Embrittlement Engineering & allied operations |
| Zdroj: | Journal of Nuclear Materials, 553, Art.-Nr.: 153009 |
| ISSN: | 0022-3115 1873-4820 |
| DOI: | 10.5445/ir/1000133973 |
| Popis: | Tungsten (W) based materials for fusion reactor applications have been developed in Japan for the last decade to improve thermo-mechanical properties and tolerance with respect to neutron-irradiation effects. Potassium (K) doping for dispersion strengthening and alloying by rhenium (Re) for solid solute softening and strengthening were applied to W fabricated by powder metallurgy. Thereby modified W materials, e.g. K-doped W and K-doped W-3%Re, demonstrated a higher recrystallization temperature threshold, an increase in strength and ductility, and a reduction in ductile-to-brittle transition temperature (DBTT) compared to pure W in the non-irradiated state. Embrittlement caused by displacement damage and its amplification due to solid transmutation products is expected to be an intrinsic issue of W based materials under neutron irradiation environment inherent to future fusion reactors. In this paper, the effect of K-doping and alloying by Re on the neutron-irradiation-induced embrittlement of W was investigated at neutron fluence causing a considerable amount of solid transmutation products. |
| Databáze: | OpenAIRE |
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