Synergistic effects on microstructural evolution and hardening of the Hastelloy N alloy under subsequent He and Xe ion irradiation

Synergistic effects in the evolution of He bubbles and dislocation loops in Hastelloy N alloy were investigated using transmission electron microscopy and nanoindentation. Results show that the sizes of both He bubbles and dislocation loops induced by the He and Xe irradiation were larger than those...

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Bibliographic Details
Published in:Journal of applied physics 2018-05, Vol.123 (20)
Main Authors: Gao, Jie, Huang, Hefei, Liu, Jizhao, Liu, Renduo, Lei, Qiantao, Li, Yan
Format: Article
Language:English
Subjects:
Applied physics
Bubbles
Dislocation loops
Evolution
Hardening
Hastelloy (trademark)
Helium
Ion irradiation
Microstructure
Nanoindentation
Transmission electron microscopy
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Summary:Synergistic effects in the evolution of He bubbles and dislocation loops in Hastelloy N alloy were investigated using transmission electron microscopy and nanoindentation. Results show that the sizes of both He bubbles and dislocation loops induced by the He and Xe irradiation were larger than those in the individual irradiation cases. The corresponding hardening degree of irradiated sample was also measured to be higher than the combined hardening value of two individual irradiation cases. The underlying physics controlling the synergistic effects have revealed that the vacancies are preferentially captured by pre-existed He bubbles as compared to their annihilation with the interstitial atoms during the subsequent Xe irradiation.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.5030028