Study of features of structure forming in the process of intensive plastic deformation of carbon structural steels has been conducted. Microstructure of the samples from 20 and 45 steels have been analyzed comparatively us ing scanning electronic microscopy, and it has been established that more intensive fragmentation of structural components not only in surfacial layers but also in the core area of processed billets occurs in equal channel angular extrusion (RKUP) in comparison with equal channel angular free drawing (RKU-FD). The study has shown that deformation strips forming in RKUP process are characterized by volumetric part 61–85 %; in the case of increase of number of RKUP passes, volumetric part of fragmented ferrite increased up to 52–68 %.
1. Valiev R. Z., Aleksandrov I. V. Ob'emnye nanostrukturnye metallicheskie materialy: poluchenie, struktura i svoystva (Bulk nanostructured metallic materials: obtaining, structure and properties). Moscow: IKTs «Akademkniga», 2007. 398 p.
2. Chukin M. V., Korchunov A. G., Polyakova M. A. And etc. Stal' - Steel. 2010. No. 6. pp. 96–98.
3. Emaleeva D. G., Chukin M. V. Journal of Magnitogorsk: Magnitogorsk State Technical University named after G. I. Nosov. 2008. No. 2. pp. 70– 71.
4. Ravnokanal'noe uglovoe pressovanie metallicheskikh materialov: dostizheniya i napravleniya razvitiya (Equal-channel angular pressing of metallic materials: achievements and directions of development): Thematic Coll. of Articles Ed. By V. M. Segal, S. V. Dobatkin, R. Z. Valiev). Metally - Metals. 2004. No. 1, 2.
5. Petrova N. D., Petrov P. P., Platonov A. A. and etc. Issledovanie vliyaniya strukturno-fazovykh izmeneniy pri intensivnoy plasticheskoy deformatsii i termicheskoy obrabotke na svoystva staley (Investigation of the influence of structural and phase changes by intensive plastic deformation and heat treatment on the properties of steels): Coll. of Nanomaterials of Technical and Medical Purpose (Ed. by A. A. Vikarchuk) — Tol'yatti: Izd-vo TGU, 2007. pp. 363–365.
6. Nikitenko O. A., Efimova Yu. Yu. Izmenenie mikrostruktury pri ravnokanal'nom uglovom pressovanii ugleroThesisykh konstruktsionnykh staley s tonkoplastinchatym stroeniem perlita v iskhodnoy strukture (Changes in the microstructure in equal-channel angular pressing carbon structural steel with thin plate-like texture of perlite in the initial structure). Proc. of XthInt. Sc. The Ural School-Seminar of Metallurgists-YoungScientists. - Ekaterinburg: Ur. Federal University named after the first President of Russia B. N. Yeltsin, 2010. pp. 85–88.
7. N. V. Koptseva, M. V. Chukin, Yu. Yu. Efimova, O. A. Nikitenko. XX Ural'skaya shkola metallovedov-termistov «Aktual'nye problemy fizicheskogo metallovedeniya staley i splavov», posvyashchennaya 100-letiyu so dnya rozhdeniya N. N. LipchinA (The XXth Ural School of Metallurgists "Actual Problems of Physical Metallurgy of Steels and Alloys", dedicated to 100 anniversary of the birth of N. N. Lipchin): Coll. of Papers - Ekaterinburg: Ur. Federal University named after the first President of Russia B. N. Yeltsin, 2010. pp. 117–122.