Accumulation and Recovery Processes in a High-Entropy Alloy Irradiated with 2.5 MeV Electrons

The accumulation and annealing characteristics of irradiation-induced defects in an Al-Co-Cr-Cu-Fe-Ni high-entropy alloy have been studied during low-temperature (80 K) irradiation with 2.5 MeV electrons and subsequent isochronous annealing. The data obtained are compared with the literature results...

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Bibliographic Details
Published in:AIP conference proceedings 2012-03
Main Authors: Petrusenko, Yuri, Bakai, Alexander, Borysenko, Valeriy, Mayevsky, Eduard, Liaw, Peter K, Wang, Gongyao, Yeh, Jien-Wei
Format: Article
Language:English
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Summary:The accumulation and annealing characteristics of irradiation-induced defects in an Al-Co-Cr-Cu-Fe-Ni high-entropy alloy have been studied during low-temperature (80 K) irradiation with 2.5 MeV electrons and subsequent isochronous annealing. The data obtained are compared with the literature results on the point-defect generation and annealing behavior in crystalline Fe-Cr-Ni alloys and steels under electron irradiation. Qualitatively irradiation dose dependences of the electrical resistivity of both families of alloys are rather similar and can be interpreted using the basic parameter of a resistivity increase per Frenkel pair. The isochronous annealing behavior for the high-entropy alloy is also similar to that of the Fe-Cr-Ni system. The characteristic activation energy of the vacancy-annealing stage is estimated. It is concluded that the increase of the resistivity during electron irradiation is induced by the Frenkel pair generation. The observed resistivity changes during annealing are caused by vacancies and compositional ordering and disordering.
ISSN:0094-243X