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

Takuya Nagasaka; Nam Jin Heo; Takeo Muroga; Arata Nishimura; Hideo Watanabe; Minoru Narui; Kenji Shinozaki

doi:10.1016/j.jnucmat.2004.04.171

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

Takuya Nagasaka, Nam Jin Heo, Takeo Muroga, Arata Nishimura, Hideo Watanabe, Minoru Narui, Kenji Shinozaki

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Conference article › peer-review

22 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1539-1543
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	329-333
Issue number	1-3 PART B
DOIs	https://doi.org/10.1016/j.jnucmat.2004.04.171
Publication status	Published - Aug 1 2004
Event	Proceedings of the 11th Conference on Fusion Research - Kyoto, Japan Duration: Dec 7 2003 → Dec 12 2003

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

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10.1016/j.jnucmat.2004.04.171

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@article{662e1c1cb0bd4a7ebd509a9bece5415c,

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

abstract = "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.",

author = "Takuya Nagasaka and Heo, {Nam Jin} and Takeo Muroga and Arata Nishimura and Hideo Watanabe and Minoru Narui and Kenji Shinozaki",

note = "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.; Proceedings of the 11th Conference on Fusion Research ; Conference date: 07-12-2003 Through 12-12-2003",

year = "2004",

month = aug,

day = "1",

doi = "10.1016/j.jnucmat.2004.04.171",

language = "English",

volume = "329-333",

pages = "1539--1543",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

number = "1-3 PART B",

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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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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 -

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

Abstract

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