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Oct 13 – 18, 2014
Hotel Park Inn Pribaltiyskaya
Europe/Moscow timezone

Neutron Irradiation Effects on Grain-Refined W and W-Alloys

Oct 18, 2014, 9:50 AM
Blue 1-5 (Hotel Park Inn Pribaltiyskaya)

Blue 1-5

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation


Mr Akira Hasegawa (Japan)


Microstructural data of neutron irradiated W such as size and number density of voids and precipitates obtained by W up to 1.5dpa irradiation in the temperature range of 400-800C were compiled quantitatively. Nucleation and growth process of these defects were clarified and a qualitative prediction of the damage structure development and hardening of W in fusion reactor environments were made taking into account the solid transmutation effects for the first time. Irradiation behavior of grain-refined W-alloys, produced by K- or La-doping, was also examined. Expected radiation resistant W-alloys, by combined Re addition and the grain refining process, were fabricated and characterization of unirradiated state were performed.
Country or International Organisation Japan
Paper Number MPT/1-4

Primary author

Mr Akira Hasegawa (Japan)


Dr Kiyohiro Yabuuchi (Tohoku.University) Mr Makoto Fukuda (Tohoku University) Dr Shuhei Nogami (Tohoku University) Dr Takashi Tanno (Japan Atomic Energy Agency) Prof. Takeo Muroga (National Institute for Fusion Science) Dr Teruya Tanaka (National Institute for Fusion Science)

Presentation materials