Impact properties of NIFS-HEAT-2 (V–4Cr–4Ti) after YAG laser welding and neutron irradiation at 563 K
Impact properties of NIFS-HEAT-2 (V–4Cr–4Ti) after YAG laser welding and neutron irradiation at 563 K
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DOI：
10.1016/j.jnucmat.2004.04.171
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发表时间：
2004-08
影响因子：
3.1
通讯作者：
T. Nagasaka;N. Heo;T. Muroga;A. Nishimura;Hideo Watanabe;M. Narui;K. Shinozaki
中科院分区：
文献类型：
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作者：
T. Nagasaka;N. Heo;T. Muroga;A. Nishimura;Hideo Watanabe;M. Narui;K. Shinozaki
参考低活化钒合金 NIFS-HEAT-2 的焊接样本在 JMTR 中于 563 K 下辐照至 4.5×1023nm−2(0.08 dpa) 的中子注量。焊缝金属比母材表现出更大的辐照硬化，焊缝金属在77 K时出现脆化。然而，通过873和1223 K的焊后热处理，有效降低了焊缝金属的辐照硬化。基于辐射缺陷的表征，讨论了辐照硬化的机理以及焊缝金属中C、N和O杂质的行为。
Weld specimens of the reference low activation vanadium alloy, NIFS-HEAT-2, were irradiated up to the neutron fluence of 4.5×1023nm−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.