Ion Radiation Impact on Microstructure and Mechanical Properties of W–6Re Alloy at 500°С

The paper reports the results of the ion irradiation impact on a monocrystalline tungsten alloy, W–6Re. This material is considered for use in the design of fusion reactors. Irradiation was carried out in order to simulate radiation effects and analyze the radiation resistance of the fusion reactor...

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Veröffentlicht in:Physics of atomic nuclei 2020, Vol.83 (12), p.1638-1643
Hauptverfasser: Nikitin, A. A., Bobyr, N. P., Rogozhkin, S. V., Fedin, P. A., Karateev, I. A., Gladkih, E. V., Zakharova, P. S.
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Sprache:eng
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Zusammenfassung:The paper reports the results of the ion irradiation impact on a monocrystalline tungsten alloy, W–6Re. This material is considered for use in the design of fusion reactors. Irradiation was carried out in order to simulate radiation effects and analyze the radiation resistance of the fusion reactor material. Specimens were irradiated with 5.6 MeV Fe ions at 500°C up to a maximum damage dose of 8 dpa. Microstructure of W–6Re was analyzed before and after irradiation. It is shown with transmission electron microscopy that the formation of structural defects, dislocation loops with sizes of 2–15 nm and a number density of 1.2 × 10 23 m –3 occurs as a result of irradiation. Detailed analysis by atomic probe tomography microscope revealed the decomposition of the solid solution with the formation of nanoscale segregations enriched in rhenium by 18 at %. The radiation-induced hardening of the irradiated layer is determined by nanoindentation. The strength increment was 1.6 GPa.
ISSN:1063-7788
1562-692X
DOI:10.1134/S1063778820120054