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On the irradiation tolerance of nano-grained Ni-Mo-Cr alloy: 1MeV He+ irradiation experiment.

Zhu, Z., Huang, H., Muransky, O., Zhu, Z. and Huang, Y., 2021. On the irradiation tolerance of nano-grained Ni-Mo-Cr alloy: 1MeV He+ irradiation experiment. Journal of Nuclear Materials. (In Press)

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Abstract

The irradiation damage behavior is surveyed in the nano-grained GH3535 condition irradiated by He ion to various dose. The evolution of defects and hardness changes are characterized by transmission electron microscopy and nanoindentation respectively to explore the irradiation tolerance of the nano-grained GH3535 condition, with the annealed GH3535 condition as reference material. The results show that though both the average size and number density of He bubbles increase with an increase in the irradiation dose, the smaller volume fraction is found in the nano-grained GH3535 condition compared with the annealed GH3535 condition under the same irradiation condition. This indicates that the nano-grained GH3535 condition possess better irradiation swelling resistance than the annealed GH3535 condition. However, the increase in the hardness of the nano-grained GH3535 condition is more significant than in the annealed GH3535 condition under the same irradiation dose. This suggests stronger irradiation-induced hardening of the nano-grained alloy comparing to coarse-grained alloy, due to the impeding effect caused by grain boundaries decorated with He bubbles. This study provides insight into the design of irradiation-tolerant nickel-based alloys for nuclear industry applications.

Item Type:Article
ISSN:0022-3115
Uncontrolled Keywords:Nano-grained nickel-based alloys; He ion irradiation; He bubble; Swelling; Irradiation induced hardening
Group:Faculty of Science & Technology
ID Code:34854
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:20 Nov 2020 20:38
Last Modified:20 Nov 2020 20:38

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