Microstructural development and radiation hardening of neutron irradiated Mo-Re alloys

Nemoto, Yoshiyuki; Hasegawa, Akira*; Sato, Manabu*; Abe, Katsunori*; Hiraoka, Yutaka*

Journal of Nuclear Materials, 324(1), p.62 - 70, 2004/01

https://doi.org/10.1016/j.jnucmat.2003.09.007

In this study, stress-relieved specimens and recrystallized specimens of pure Mo and Mo-Re alloys (Re content=2,4,5,10,13 and 41wt%) were neutron irradiated up to 20dpa at various temperatures (681-1072K). On microstructure observation, sigma phase and chi phase precipitates were observed in all irradiated Mo-Re alloys. Voids were observed in all irradiated specimen, and dislocation loops and dislocations were observed in the specimens that were irradiated at lower temperatures. On Vickers hardness testing, all of the irradiated specimens showed hardening. Especially Mo-41Re were drastically embrittled after irradiation at 874K or less. From these results, authors discuss about relation between microstructure development and radiation hardening, embrittlement, and propose the most efficient Re content and thermal treatment for Mo-Re alloys to be used under irradiation condition.

Radiation induced electric conductivity of alumina insulator and its application to radiation dosimetry in high energy and high flux neutron field

Oyama, Yukio; ; Noda, Kenji; Maekawa, Hiroshi

KEK-Proceedings-95-1, 0, p.293 - 302, 1995/06

no abstracts in English

Calculation of neutron field generated at thick Li target bombarded with 10-40 MeV deuterons for energy selective neutron irradiation test facility

Oyama, Yukio; Yamaguchi, Seiya*; Kosako, Kazuaki*; Maekawa, Hiroshi

JAERI-M 92-191, 46 Pages, 1992/12

JAERI-M-92-191.pdf:1.12MB

no abstracts in English