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Nanoindentation and TEM to Study the Cavity Fate after Post-Irradiation Annealing of He Implanted EUROFER97 and EU-ODS EUROFER



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Roldán, Marcelo and Fernández, Pilar and Rams, Joaquín and Sánchez, Fernando and Gómez Herrero, Adrián (2018) Nanoindentation and TEM to Study the Cavity Fate after Post-Irradiation Annealing of He Implanted EUROFER97 and EU-ODS EUROFER. Micromachines, 9 (12). p. 633. ISSN 2072-666X

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Official URL: https://doi.org/10.3390/mi9120633


The effect of post-helium irradiation annealing on bubbles and nanoindentation hardness of two reduced activation ferritic martensitic steels for nuclear fusion applications (EUROFER97 and EU-ODS EUROFER) has been studied. Helium-irradiated EUROFER97 and EU-ODS EUROFER were annealed at 450 °C for 100 h in an argon atmosphere. The samples were tested by nanoindentation and studied by transmission electron microscopy extracting some focused ion beam lamellae containing the whole implanted zone (≈50 µm). A substantial increment in nanoindentation hardness was measured in the area with higher helium content, which was larger in the case of EUROFER97 than in EU-ODS EUROFER. In terms of microstructure defects, while EU-ODS EUROFER showed larger helium bubbles, EUROFER97 experienced the formation of a great population density of them, which means that the mechanism that condition the evolution of cavities for these two materials are different and completely dependent on the microstructure.

Item Type:Article
Uncontrolled Keywords:nanoindentation; reduced activation ferritic martensitic (RAFM) steels; helium irradiation; irradiation hardening; nuclear fusion structural materials
Subjects:Sciences > Physics > Electronics
Sciences > Computer science > Electronics
ID Code:66539
Deposited On:05 Jul 2021 14:21
Last Modified:14 Jan 2022 12:26

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