Mats V. Radiation-stimulated processes in nanostructured zirconium and Zr1Nb, Zr2,5Nb alloys under electron irradiation.

A systematic study of features of transformation of nanostructure of zirconium and his alloys is in process undertaken with niobium, formed by an intensive flowage, under the action of irradiation electrons.Conformities to law and mechanisms of forming of the ultra fine-grained and nanostructured states are set by an intensive flowage rolling in the conditions of small level of the thermal activating (Т<0,2Тm). At research of transformation of imperfect structure the physical (effective) width of borders was examined. So, a diffusive width on an order exceeds crystallography and makes 10nm. It is shown that as a result of irradiation the effective width of borders diminishes, and the extent of the last increases, that is investigation of cooperation of point and linear defects.The features of changes are studied in a nanostructure under the action of irradiation electrons with energy 10 MeV classified as relaxation processes. The mechanisms of micro plastic flow under an irradiation, stipulating the decline of level internal tensions and return of mechanical properties, are reasonable.It is shown that most radiation-resistant is an alloy of Zr2,5Nb, combining high durability and plastic properties in the radiation-exposed state. The high intensity of low temperature desorption of the implanted heavy hydrogen, related to high concentration of diffusive ways in nanostructure standards, is established.