@article{oai:repo.qst.go.jp:00084518,
 author = {Gietl, Hanns and Koyanagi, Takaaki and Hu, Xunxiang and Fukuda, Makoto and Hasegawa, Akira and Katoh, Yutai and Makoto, Fukuda},
 journal = {Journal of Alloys and Compounds},
 month = {Dec},
 note = {To understand the microstructural stability of candidate plasma-facing materials under fusion-relevant environments, neutron irradiation of W and W-3%Re alloys with and without K and La dopants was per formed in the mixed-spectrum High Flux Isotope Reactor at nominal temperatures of ~850 °C and ~1100 °C to calculated doses between 0.42 and 0.47 dpa. To the best of our knowledge, this study presents the first experimental evidence of radiation-enhanced recrystallization in W and undoped W–Re alloys at ~850 °C, conditions where thermal annealing does not cause any grain growth in a similar timescale. Potassium- or lanthanum-doped tungsten alloys showed more resistance to radiation-enhanced grain growth. We explain the acceleration of grain growth by analyzing the self-diffusion constant under atomic displacement environments. The microstructural observations of the studied W variants suggest that La doping is more effective than K doping for mitigating recrystallization. This study also found that radiation-enhanced crystallization is an important consideration when designing and applying W to plasma-facing components in future nuclear fusion reactors.},
 title = {Neutron irradiation-enhanced grain growth in tungsten and tungsten alloys},
 volume = {901},
 year = {2021}
}