[en] This paper is an analysis of studies of thermal decomposition of solids under the effect of an electric field (EF). Examples of this effect are cited. In discussing the EF effect on the rate of decomposition of solids, the following aspects are considered: properties of crystals grown in EF, the EF effect on the electronic and ionic processes in solids, the EF effect on dislocations, the EF effect on luminescence, phase transitions in EF (VO₂), adsorption in EF; changes in the properties of solids surfaces under the effect of EF. The importance of electric field variations in the study and control of the rate of thermal decomposition of solids is emphasized

[en] The results of plastometric testings of Zircaloy-4 zirconium alloy in the temperature range between 500 and 1100 grad C are presented. The testings were executed via hot twisting at 0.5 and 2.5 s^-1 deformation rates on Setaram plastometer. Analysis of flow curves is given and the area of maximal ductility of this alloy is established

No abstract available

[en] Improvement of internally lined claddings of fuels follows the path of developing an inner liner for low alloyed zirconium alloys that has to combines resistance to SCC and high corrosion resistance in steam. Claddings internally lined with corrosion resistant alloys have been developed by several outside companies and a similar objective is being resolved at VNIINM. The set up objective specified the requirements placed on a liner material. With account for the requirements the basic alloying additives were chosen and laboratory-scale zirconium alloy ingots were fabricated that have been processed into strips. Based on the results of the investigations the choice was made of alloys containing Fe, Cr and Nb additives for linear tubing. Semi-commercial ingots of two compositions were fabricated from the developed low alloyed zirconium alloys and pilot batches of full-scale liner tubes based on E110 (Zr-1%Nb) alloy were produced for the VVER-1000 fuels. Out of - and - in pile tests of fabricated tube samples have been launched. (author)

No abstract available

[en] Comparative investigations of mechanical properties, macro- and microstructure of Zr-1%Nb alloy blanks produced in hot treatment of ingots applying two methods: forging and radial-shear rolling were carried out, and the quality of semi-finished and finished products were evaluated. It was demonstrated that forging had a larger depth of the structure processing as compared with rolling that forms the material state of higher characteristics of strength and impact viscosity and provides its compactness

[en] The mechanisms responsible for passing plastic deformation in alloys are determined on the basis of results of X-ray texture analysis of Zr-1 % Nb and Zr-2.5 % Nb model specimens subjected to uniaxial compression at temperatures of β- and (α+β)- phase fields. These mechanisms include crystallographic slip in β-Zr and α-Zr in grains as well as mutual displacement of crystallites along interphase boundaries activated under conditions of α↔β phase transformations and underlying the phenomenon of superplasticity. The contribution of each of mechanisms to formation of semiproducts texture is dependent on temperature-rate compression conditions