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Title: Role of Criston Shear Sources in the Formation of Chernov-Luders Bands
Other Titles: Роль кристонных источников сдвига в формировании полос Чернова-Людерса
Authors: Kashchenko, M. P.
Semenovykh, A. G.
Nefedov, A. V.
Kashchenko, N. M.
Chashchina, V. G.
Issue Date: 2021
Publisher: Institute of Continuous Media Mechanics
Institute of Continuous Media Mechanics
Citation: Role of Criston Shear Sources in the Formation of Chernov-Luders Bands [Роль кристонных источников сдвига в формировании полос Чернова-Людерса] / M. P. Kashchenko, A. G. Semenovykh, A. V. Nefedov et al. — DOI 10.17323/1728-192x-2020-3-19-43 // Computational Continuum Mechanics. — 2021. — Vol. 14. — Iss. 2. — P. 203-209.
Abstract: Shear bands often appear during plastic deformation. The Chernov-Luders band is an example of a complex multiscale heterogeneous structure containing shear bands. The article is devoted to the analysis of a part of the experimental data on the formation (under tension) of Chernov-Luders band in textured polycrystalline steel samples with fine grain, pre-deformed by rolling. The main attention is focused on the criston mechanism of formation of the observed texture components. The essence of the criston approach, associated with the contact interaction of dislocations at the intersection of slip planes, is briefly described. Information on the observed types of texture is given and a sufficiently detailed analysis of the reconstruction of the mechanism of the appearance of several texture components is carried out taking into account the interaction of the main dislocation slip systems for a body-centered cubic (bcc) lattice. It is shown that some of the real shear directions correspond to the interaction of more than two dislocation slip systems, that is, in fact, there are criston-cristons combinations. A summary table of the results of the analysis of the "composition" of cristons for all texture components is presented, reflecting the fractional contribution of dislocations belonging to interacting slip systems. The analysis has shown that practically all systems of standard slip along the planes of the {110}, {112}, {123} families play an active role in the formation of cristons and, accordingly, the observed texture. Brief summary comments are provided. In particular, it was noted that, with a sequential criston approach, the issue of non-Schmidian slip variants can be eliminated. The important role of texturing is also noted for the ordering of the intergranular medium and the appearance of macroconcentrators in groups of contacting grains, which, as experience shows, are important in the formation of Chernov-Luders band. © 2021 Izdatel'stvo Meditsina. All rights reserved.
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85111769168
PURE ID: 22844751
ISSN: 1999-6691
DOI: 10.17323/1728-192x-2020-3-19-43
metadata.dc.description.sponsorship: This work was supported by the Ministry of Science and Higher Education of the Russian Federation (state task No 075-00243-20-01, FEUZ-2020-0013).
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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