@article{c8f44e15e19345e2896b2fba032d4fc8,
title = "Heavy-ion irradiation and post-irradiation annealing effects in explosion-welded CuCrZr/316LN joints for ITER application",
abstract = "Bimetallic plates of CuCrZr/316LN are important heat sink components in the ITER first wall. Their in-reactor performance was investigated with 6.4 MeV Fe3+ ion irradiation (500 °C/10.5 dpa), as an analogue for neutron damage. Detailed characterizations showed that the CuCrZr/316LN joints have maintained good structural integrity after irradiation. The as-irradiated interface consisted of a nanocrystalline interlayer, typically of <1 μm in width, mixed of CuCrZr and 316LN grains measuring 20–250 nm in size. Black-spots and loop/loop rafts dominated the damage microstructure on 316LN and CuCrZr sides of the interface, respectively. A series of 30 min long post-irradiation annealing experiments saw the onset of interlayer evolution in CuCrZr/316LN joints at 400 °C by grain boundary motion and Ostwald ripening, and further acceleration at ≥600 °C. Structural collapse of the interlayer is expected at extended time scales. Finally, a brief comparison between heavy-ion and neutron irradiation damage (Yi et al. 2021) in CuCrZr/316LN joints is made, with regard to defect production and interfacial transport behaviour of chemical elements.",
keywords = "Annealing, CuCrZr/316LN, Diffusion, Explosion welding, Heavy-ion irradiation, Microstructure",
author = "Xiaoou Yi and Yufeng Du and Diancheng Geng and Zihao Li and Wentuo Han and Pingping Liu and Jiming Chen and Kiyohiro Yabuuchi and Kenta Yoshida and Somei Ohnuki and Qian Zhan and Farong Wan and Yasuyoshi Nagai",
note = "Funding Information: Heavy-ion irradiations were carried out on the dual-ion irradiation experimental test facility (DuET) at Kyoto University, Japan. The authors wish to thank the Institute of Advanced Energy, Kyoto University for allocation of facility beam time, via proposal No. ZE2020B-13. X. Yi acknowledges the National Natural Science Foundation of China for funding support via grant No. 51701014 ; the Southwestern Institute of Physics (SWIP), China for supplying test pieces of ITER-grade explosion-welded CuCrZr/316LN joints; the International Research Centre for Nuclear Materials Science (Oarai) – Institute for Materials Research (IMR), Tohoku University for allocation of JEM ARM200F machine time via proposals No. 19M0042, 20M0502 and Prof. T. Toyama for enlightening discussions. J.M. Chen acknowledges the Science and Technology Program of Sichuan Province, China for funding support via grant No. 2019YJ0301. All authors wish to thank Dr. Q.S. Deng from Beijing University of Technology, China for help and guidance with FIB sample preparation. Funding Information: Heavy-ion irradiations were carried out on the dual-ion irradiation experimental test facility (DuET) at Kyoto University, Japan. The authors wish to thank the Institute of Advanced Energy, Kyoto University for allocation of facility beam time, via proposal No. ZE2020B-13. X. Yi acknowledges the National Natural Science Foundation of China for funding support via grant No. 51701014; the Southwestern Institute of Physics (SWIP), China for supplying test pieces of ITER-grade explosion-welded CuCrZr/316LN joints; the International Research Centre for Nuclear Materials Science (Oarai) ? Institute for Materials Research (IMR), Tohoku University for allocation of JEM ARM200F machine time via proposals No. 19M0042, 20M0502 and Prof. T. Toyama for enlightening discussions. J.M. Chen acknowledges the Science and Technology Program of Sichuan Province, China for funding support via grant No. 2019YJ0301. All authors wish to thank Dr. Q.S. Deng from Beijing University of Technology, China for help and guidance with FIB sample preparation. Publisher Copyright: {\textcopyright} 2021 Elsevier Inc.",
year = "2021",
month = aug,
doi = "10.1016/j.matchar.2021.111252",
language = "English",
volume = "178",
journal = "Materials Characterization",
issn = "1044-5803",
publisher = "Elsevier Inc.",
}