Impact properties of NIFS-HEAT-2 (V–4Cr–4Ti) after YAG laser welding and neutron irradiation at 563 K

Weld specimens of the reference low activation vanadium alloy, NIFS-HEAT-2, were irradiated up to the neutron fluence of 4.5 × 10 23 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....

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Veröffentlicht in:Journal of nuclear materials 2004-08, Vol.329, p.1539-1543
Hauptverfasser: Nagasaka, Takuya, Heo, Nam-Jin, Muroga, Takeo, Nishimura, Arata, Watanabe, Hideo, Narui, Minoru, Shinozaki, Kenji
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container_end_page 1543
container_issue
container_start_page 1539
container_title Journal of nuclear materials
container_volume 329
creator Nagasaka, Takuya
Heo, Nam-Jin
Muroga, Takeo
Nishimura, Arata
Watanabe, Hideo
Narui, Minoru
Shinozaki, Kenji
description Weld specimens of the reference low activation vanadium alloy, NIFS-HEAT-2, were irradiated up to the neutron fluence of 4.5 × 10 23 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.
doi_str_mv 10.1016/j.jnucmat.2004.04.171
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title Impact properties of NIFS-HEAT-2 (V–4Cr–4Ti) after YAG laser welding and neutron irradiation at 563 K
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