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Metal processing
ArticleName Changes of structure, phase composition and properties of aluminum-base alloys during electron and neutron irradiation
ArticleAuthor Platov Yu. M., Ivanov L. I., Zabolotny V. T., Lazorenko V. M., Tovtin V. I.
ArticleAuthorData

Establishment of Russian Academy of Sciences Baykov Institute of Metallurgy and Materials Science (IMET RAS)

Yu. M. Platov, Chief Scientist
L. I. Ivanov, Chief Scientist
V. T. Zabolotniy, Deputy Director of Institute, Chief Scientist
V. M. Lazorenko, Senior Researcher
V. I. Tovtin, Senior Researcher, e-mail: tovtinv@list.ru

Abstract

The mechanisms of interstitial dislocation loops formation under electron irradiation of pure Al and Al—Mg, Al—Zn and Al—Sc solid solutions are studied. The analytical expression describing the kinetics of accumulation of interstitials in the loops is obtained. Numerical calculations of the nucleation and growth parameters for electron irradiated Al are conducted in the frame of classical and kinetics models. It is shown, that critical nucleus of loop is a complex consisting of two dumbbell interstitials. The formula describing kinetics of low temperature radiation hardening of irradiated materials is obtained. Calculations of radiation harding of Al, Al—Mg, Al—Zn and Al—Sc are carried out with the with the using of this formula. The change of the phase composition of these alloys during electron and neutron irradiation are obtained experimentally. The Al–Mg–Sc alloys are proposed for using as prospective radiation resistance structural materials for nuclear energetic. These alloys do not change their mechanical properties after neutron irradiation (fluence 2,5·1020 cm–2, T = 150 oC) that has been testing the alloys at 20–300 oC.

keywords Interstitial dislocation loops, aluminum-base alloys, electron and neutron irradiation, numerical calculations, classical and kinetics models
References

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