@article{b775baee99af4aca81d9449b52da31ac,
title = "Neutron irradiation response of explosion-welded CuCrZr/316LN joints for ITER application",
abstract = "Explosion-welded CuCrZr/316LN joints, which serve as key joining components in enhanced-heat-flux type first wall panels of ITER, have been neutron irradiated in the BR2 reactor (Belgium) at <190 °C, up to 0.3 dpa. The joints have maintained good structural integrity after irradiation and were free of void swelling. Radiation defects featuring black-spot contrasts were produced on both sides of the CuCrZr/316LN interface. They were on the order of 1022 m−3 in number density and all less than 4 nm in average size. Radiation-enhanced diffusion might have favoured the dissolution of interlayers which were characteristic of pristine CuCrZr/316LN joints, and accelerated the diffusion of key elements (e.g. Cu, Fe) across the interface. The joint interface experienced an increase of Vickers hardness by ~ 21% (∆Hv = 48) after neutron irradiation. Heat treatments of 500 °C/1 h resulted in moderate softening of the interface, while 800 °C/1 h gave rise to a complete elimination of irradiation-induced hardening effect, respectively.",
keywords = "CuCrZr/316LN, Explosion welding, Mechanical properties, Microstructure, Neutron irradiation",
author = "Xiaoou Yi and Yufeng Du and Yihang Li and Wentuo Han and Pingping Liu and Kenta Yoshida and Takeshi Toyama and Jiming Chen and Qian Zhan and Farong Wan and Somei Ohnuki and Yasuyoshi Nagai",
note = "Funding Information: Post-irradiation experiments on CuCrZr/316LN joints were conducted at the International Research Centre for Nuclear Materials Science (Oarai), Institute for Materials Research (IMR), Tohoku University. The authors wish to thank the IMR staffs K. Suzuki and T. Maniwa for their kind assistance. X. Yi acknowledges funding support from the Global Institute for Materials Research Tohoku (GIMRT) program via proposal No. 19M0504 and the National Natural Science Foundation of China via grant No. 51701014. J.M. Chen acknowledges the Science and Technology program of Sichuan Province, China for funding support No. 2019YJ0301. Funding Information: Post-irradiation experiments on CuCrZr/316LN joints were conducted at the International Research Centre for Nuclear Materials Science (Oarai), Institute for Materials Research (IMR), Tohoku University. The authors wish to thank the IMR staffs K. Suzuki and T. Maniwa for their kind assistance. X. Yi acknowledges funding support from the Global Institute for Materials Research Tohoku (GIMRT) program via proposal No. 19M0504 and the National Natural Science Foundation of China via grant No. 51701014 . J.M. Chen acknowledges the Science and Technology program of Sichuan Province, China for funding support No. 2019YJ0301. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",
year = "2021",
month = aug,
doi = "10.1016/j.fusengdes.2021.112620",
language = "English",
volume = "169",
journal = "Fusion Engineering and Design",
issn = "0920-3796",
publisher = "Elsevier BV",
}