TY - JOUR
T1 - Impact properties of NIFS-HEAT-2 (V-4Cr-4Ti) after YAG laser welding and neutron irradiation at 563 K
AU - Nagasaka, Takuya
AU - Heo, Nam Jin
AU - Muroga, Takeo
AU - Nishimura, Arata
AU - Watanabe, Hideo
AU - Narui, Minoru
AU - Shinozaki, Kenji
N1 - Funding Information:
This study was supported by JUPITER-II program (Japan–USA Program of Irradiation Test for Fusion Research), and the inter-university cooperative research program of the Irradiation Experimental Facility, Institute for Materials Research, Tohoku University.
PY - 2004/8/1
Y1 - 2004/8/1
N2 - Weld specimens of the reference low activation vanadium alloy, NIFS-HEAT-2, were irradiated up to the neutron fluence of 4.5 × 1023 nm-2 (0.08 dpa) at 563 K in JMTR. The weld metal showed larger irradiation hardening than that of the base metal, and the weld metal showed an embrittlement at 77 K. However, irradiation hardening at the weld metal was effectively reduced by post weld heat treatment at 873 and 1223 K. Mechanisms of irradiation hardening, and behavior of C, N and O impurities in the weld metal was discussed, based on the characterization of radiation defects.
AB - Weld specimens of the reference low activation vanadium alloy, NIFS-HEAT-2, were irradiated up to the neutron fluence of 4.5 × 1023 nm-2 (0.08 dpa) at 563 K in JMTR. The weld metal showed larger irradiation hardening than that of the base metal, and the weld metal showed an embrittlement at 77 K. However, irradiation hardening at the weld metal was effectively reduced by post weld heat treatment at 873 and 1223 K. Mechanisms of irradiation hardening, and behavior of C, N and O impurities in the weld metal was discussed, based on the characterization of radiation defects.
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U2 - 10.1016/j.jnucmat.2004.04.171
DO - 10.1016/j.jnucmat.2004.04.171
M3 - Conference article
AN - SCOPUS:3342977163
SN - 0022-3115
VL - 329-333
SP - 1539
EP - 1543
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3 PART B
T2 - Proceedings of the 11th Conference on Fusion Research
Y2 - 7 December 2003 through 12 December 2003
ER -