V. I. Bobrovskii

ON MODELS FOR ESTIMATING THE POST-RADIATION DEFECT STATE OF THE γ‘-PHASE

Processes that take place in the precipitates of γ‘-phase under irradiation with fast neutrons are topical and draw attention when one searches for ways of improving radiation resistance of structural reactor steels. A special feature of these processes is that the formation of vacancies and interstices proceeds at the background of a disordering of the initial crystal lattice, which manifests itself in the formation of antisite defects. X-ray and neutron diffraction techniques are efficient tools of studying changes that occur in the post-radiation structural state of such systems. However, interpretation of the experimental results calls for more complicated models for the description of structural effects exerted by accumulation of radiation defects in the material than those developed before for elementary metals. Several models are proposed in this paper.

Acknowledgment: The research was carried out at the IMP Neutron Material Science Complex within the state assignment of the Ministry of Science and Higher Education of the Russian Federation (theme “Neutron” No. AAAA-A19-119112590082-1).

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