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A. V. Makarov, S. P. Yakovleva, E. G. Volkova, S. N. Makharova, P. G. Mordovskoy

SPECIAL FEATURES OF THE FORMATION OF THE MICROSTRUCTURE OF THE 09G2S STEEL UNDER CONDITIONS OF COLD AND WARM EQUAL-CHANNEL ANGULAR PRESSING

DOI: 10.17804/2410-9908.2016.6.039-047

Translucent electron microscopy is used to make a comparative analysis of the microstructure of the 09G2S steel in the initial state, after equal-channel angular pressing (ECAP) at 20 °C and after warm ECAP at 450 °C. The effect of ECAP at 20 °C leads to the formation of a mixed (subgranular and cellular) ferrite structure and the destruction of pearlite colonies. There occur the crushing and spheroidization of cementite particles. Warm ECAP deformation at 450 °C contributes to the formation of a polygonized structure with submicron scale elements in ferrite. In the main, the pearlite colonies undergo insignificant changes, and there are individual sections with destroyed pearlite colonies and severe dispersion of cementite. The mechanical properties of the steel in three examined structural states are presented.

Keywords: low-carbon steel, microstructure, equal-channel angular pressing, electron microscopy, mechanical properties

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Article reference

Special Features of the Formation of the Microstructure of the 09g2s Steel under Conditions of Cold and Warm Equal-Channel Angular Pressing [Electronic resource] / A. V. Makarov, S. P. Yakovleva, E. G. Volkova, S. N. Makharova, P. G. Mordovskoy // Diagnostics, Resource and Mechanics of materials and structures. - 2016. - Iss. 6. - P. 39-47. -
DOI: 10.17804/2410-9908.2016.6.039-047. -
URL: http://eng.dream-journal.org/issues/2016-6/2016-6_112.html
(accessed: 12/07/2022).  

 

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