Line of scientific research: To study of influence of intensive plastic deformations, high pressures and concentrated energy flows on a structure and properties of solids.
Basic results
- A new method of materials treatment by pressure is proposed and developed – twist extrusion. This method allows to make ultramicrocrystalline and nanocrystalline structures in volume samples both by fragmentation in large scale crystalline materials and by consolidation of amorphous and nanocrystalline powders. The method opens a new possibilities to study the solids structure, evolution at intensive plastic deformation under pressure.
- It is shown at first that increasing of pressure in the area of intensive plastic deformation results not only in supresion of material destruction process, but in increasing of fragmentation intensity.
- Posibility of metal plasticity enhancement after enough large deformation under pressure is predicted on base of mathematic simulation.
- Ultramicrocrystalline and nanocrystalline samples of alloys on the base of aluminium, titan, copper and iron are obtained.
Applied research:
Optimum conditions and deformation modes of high-nitrogenous steels under pressures are determined. That allows to obtain high complex of strength and plastic properties (Kourdyumov award of NASU in 2002). The technology of manufactured plasticity increasing of secondary aluminium alloys is developed. The technology is based on application of the twist extrusion method.
Scientific co-operation
Institutes of NAS of Ukraine: Institute of metallophysics, Institute for Problems of Materials Science, Institute for Superhard Materials; Institute of mettalurgy and material science RAS (Moscow, Russia); Institute of metallophysics UD RAS, Institute of Electrophysics UD RAS, Institute of Engineering Science UD RAS (Ekaterinburg, Russia); Institute for Metals Superplasticity Problems (Ufa, Russia); Ural State Technical University, Ural State University (Ekaterinburg, Russia); Institute of Physics of Advanced Materials under USATU (Ufa, Russia);
Los Alamos National Laboratory General Electric Company, Clemson University (USA); Solid Mechanics Laboratory CNRD, Department of Mechanics Ecole polytechnique; Laboratoire de Physique et Mecanique des Materiaux Universite de Metz (France); Institute of Fundamental Technological Problems of PAN (Poland)
Selected publication
- Y.E. Beygelzimer. Grain refinement versus voids accumulation during severe plastic deformations of polycrystals: mathematical simulation. Mechanics of Materials 37, 753 (2005).
- M.M.Savosta, V.N.Krivoruchko, I.A.Danilenko, V.N.Varyukhin, V.Yu.Tarenkov, T.E.Konstantinova. Nuclear spin dynamies and magnetic structure of nanosized particles of La0.7 Sr0.3MnO3. Phys. Rev.B. 69, 024413 (2004).
- R.V.Shalaev, V.N.Varyukhin, A.M.Prudnikov. Influence of UV-radiation on structure and properties of diamondlike a-C: N films. Functional Materials 3 (11), 617 (2004).
- I.M.Fita, R.Szymczak, M.Baran, V.Markovich, R.Puzniak, A.Wisniewski, C.V.Shiryaev, V.N.Varyukhin and H.Szymczak. Evolution of ferromagnetic order in LaMnO3.05 single crystals: Common origin of both pressure and selfdoping effects. Phys. Rev.B. 68 014436 (2003).
- Я.Е.Бейгельзимер, В.Н.Варюхин, Д.В.Орлов, С.Г.Сынков. Винтовая экструзия – процесс накопления деформации. Донецк: ТЕАН, 85 (2003).
- B.M.Efros, V.P.Pilyugin, S.V.Gladkovskii. Pressure influence on solid phase transformation in metals and alloys after severe plastic deformation. Defects and Diffusion Forum 208, 263 (2002).
Scientific composition of department
Head of department,
VARYUKHIN Victor Nikolaevich
corr.Member NASc of Ukraine, doctor of physico-mathematical sciences, professor
(062) 342-96-08
var@hpress.fti.ac.donetsk.ua
Chief scientist,
BEYGELZIMER Yan Yefimovich
doctor of physico-mathematical sciences, professor
(062) 342-76-08
yanbeygel@gmail.com
Senior scientist,
BELOUSOV Nicolay Nicolaevich
candidate of physico-mathematical sciences
bil@hpress.fti.ac.donetsk.ua
