Cryodeformation of metals under all-around compression.

Plastic deformation is one of the most important ways to improve metals and alloys' physical and mechanical properties. Many such treatment methods have been developed, but the opportunities provided by the temperature decreasing during deformation into the cryogenic region are being ignored. Despite the effectiveness of cryodeformation, work in this direction is practically not carried out today. There is reason to assume that the researchers are stopped by fears of the complexity of the implementation of such deformation treatment. There is a small number of published works dedicated to this direction, since, unfortunately, the following factors of cryodeformation applicability were not critically considered: the range of materials for which this type of plastic deformation provides the maximum effect, the complexity of equipment for such deformation. This paper discusses the problems of cryodeforming under all-around compression (barocryodeformation), methods, and features of its implementation. A new method of cryodeformation is proposed – cryo-upsetting under all-around compression, which, together with cryoquasihydroextrusion, significantly expands the possibilities of barocryodeformation of metals and alloys. [ABSTRACT FROM AUTHOR]