TY - JOUR
T1 - Microstructural development and radiation hardening of neutron irradiated Mo-Re alloys
AU - Nemoto, Yoshiyuki
AU - Hasegawa, Akira
AU - Satou, Manabu
AU - Abe, Katsunori
AU - Hiraoka, Yutaka
N1 - Funding Information:
This work was supported by JUPITER program (Japan-USA Program of Irradiation Test for Fusion Research) and by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan. EDS analysis of this work was done with the advice of Dr Dave Gelles and Dr John Vetrano at Pacific Northwest National Laboratory, USA. To whom the authors are grateful.
PY - 2004/1/1
Y1 - 2004/1/1
N2 - Stress-relieved specimens and recrystallized specimens of pure Mo and Mo-Re alloys with Re contents of 2, 4, 5, 10, 13 and 41 wt% were neutron irradiated up to 20 dpa at temperatures from 681 to 1072 K. On microstructural observation, sigma phase and chi phase precipitates were found in all irradiated Mo-Re alloys. Voids were observed in all irradiated specimens, 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 874 K or below. From these results, the authors discuss about the relation between microstructure development and radiation hardening and embrittlement, and propose the optimum Re content and thermal treatment for Mo-Re alloys to be used under irradiation conditions.
AB - Stress-relieved specimens and recrystallized specimens of pure Mo and Mo-Re alloys with Re contents of 2, 4, 5, 10, 13 and 41 wt% were neutron irradiated up to 20 dpa at temperatures from 681 to 1072 K. On microstructural observation, sigma phase and chi phase precipitates were found in all irradiated Mo-Re alloys. Voids were observed in all irradiated specimens, 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 874 K or below. From these results, the authors discuss about the relation between microstructure development and radiation hardening and embrittlement, and propose the optimum Re content and thermal treatment for Mo-Re alloys to be used under irradiation conditions.
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U2 - 10.1016/j.jnucmat.2003.09.007
DO - 10.1016/j.jnucmat.2003.09.007
M3 - Article
AN - SCOPUS:0344153758
SN - 0022-3115
VL - 324
SP - 62
EP - 70
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1
ER -