Alloys with a Cellular Dislocation Substructure: Hardening Mechanisms and Their Contributions to Flow Stresses

УДК 539.373:669.35:539.214

  • Lyudmila I. Trishkina Tomsk State University of Architecture and Building, Tomsk, Russia Email: trishkina.53@mail.ru
  • Anatoly A. Klopotov Tomsk State University of Architecture and Building, Tomsk, Russia Email: klopotovaa@tsuab.ru
  • Tatiana V. Cherkasova Tomsk State University of Architecture and Building, Tomsk, Russia; National Research Tomsk Polytechnic University, Tomsk, Russia Email: cherkasova_tv@mail.ru
  • Alexander I. Potekaev National Research Tomsk State University, Tomsk, Russia, Tomsk Scientific Center SB RAS, Tomsk, Russia Email: potekaev@spti.tsu.ru
  • Vladislav I. Borodin National Research Tomsk State University, Tomsk, Russia Email: v.borodin@gtt.gazprom.ru
DOI_disc_logo https://doi.org/10.14258/izvasu(2024)1-09
Keywords: Cu-Mn alloys, solid solution hardening, dislocation substructures

Abstract

The study covers dilute Cu-Mn alloys with a cellular dislocation substructure formed during deformation. The contribution to the flow stress caused by the cellular dislocation substructure is evaluated, and relative roles of various deformation resistance mechanisms are determined. The analysis of electron microscopic images of thin foils of deformed low-alloy Cu-Mn alloys shows the contribution of various dislocation substructure parameters. Such parameters are the scalar dislocation density, dislocation densities in cell walls, boundaries of disoriented cells, ragged sub-boundaries, boundaries of band and fragmented substructures, and grain boundaries. It is found that the contribution of disorientations at cell boundaries increases along with the increase of the misoriented cell boundaries density and the disorientation angle. The efficiency of the cell walls performed as obstacles to sliding is related to the appearance of disorientations through the cell boundaries and their increase with increasing strain. The appearance of disorientations enhances the barrier drag effect in a cellular dislocation substructure.

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Author Biographies

Lyudmila I. Trishkina, Tomsk State University of Architecture and Building, Tomsk, Russia

Doctor of Sciences in Physics and Mathematics, Professor of the Department of Physics, Chemistry and Theoretical Mechanics

Anatoly A. Klopotov, Tomsk State University of Architecture and Building, Tomsk, Russia

Doctor of Sciences in Physics and Mathematics, Professor of the Department of Applied Mechanics and Materials Sciences

Tatiana V. Cherkasova, Tomsk State University of Architecture and Building, Tomsk, Russia; National Research Tomsk Polytechnic University, Tomsk, Russia

кандидат физико-математических наук, доцент кафедры физики, химии и теоретической механики; старший преподаватель Отделения экспериментальной физики

Alexander I. Potekaev, National Research Tomsk State University, Tomsk, Russia, Tomsk Scientific Center SB RAS, Tomsk, Russia

Doctor of Sciences in Physics and Mathematics, Professor of Department of General and Experimental Physics

Vladislav I. Borodin, National Research Tomsk State University, Tomsk, Russia

Research Engineer of the Department of General and Experimental Physics

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Published
2024-04-05
How to Cite
Trishkina L. I., Klopotov A. A., Cherkasova T. V., Potekaev A. I., Borodin V. I. Alloys with a Cellular Dislocation Substructure: Hardening Mechanisms and Their Contributions to Flow Stresses // Izvestiya of Altai State University, 2024, № 1(135). P. 67-75 DOI: 10.14258/izvasu(2024)1-09. URL: http://izvestiya.asu.ru/article/view/%282024%291-09.
Issue
No 1(135) (2024): Известия Алтайского государственного университета
Section
Физика

Copyright (c) 2024 Людмила Ильинична Тришкина, Анатолий Анатольевич Клопотов, Татьяна Викторовна Черкасова, Александр Иванович Потекаев, Владислав Иванович Бородин

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