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Effect of the Dislocation Substructure Parameters of Hadfield Steel on Its Strain Hardening

This article presents a study of changes in the microstructure of Hadfield steel depending on the tensile deformation and cold rolling with the strain/stress level. It has been established that the change in the “σ-ε” curve (at ε = 5%) is accompanied by a 1.5-times decrease in the strain-hardening c...

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Autores principales: Russakova, Alyona, Zhilkashinova, Almira, Alontseva, Darya, Abilev, Madi, Khozhanov, Alexandr, Zhilkashinova, Assel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9963796/
https://www.ncbi.nlm.nih.gov/pubmed/36837347
http://dx.doi.org/10.3390/ma16041717
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author Russakova, Alyona
Zhilkashinova, Almira
Alontseva, Darya
Abilev, Madi
Khozhanov, Alexandr
Zhilkashinova, Assel
author_facet Russakova, Alyona
Zhilkashinova, Almira
Alontseva, Darya
Abilev, Madi
Khozhanov, Alexandr
Zhilkashinova, Assel
author_sort Russakova, Alyona
collection PubMed
description This article presents a study of changes in the microstructure of Hadfield steel depending on the tensile deformation and cold rolling with the strain/stress level. It has been established that the change in the “σ-ε” curve (at ε = 5%) is accompanied by a 1.5-times decrease in the strain-hardening coefficient. At ε = 0 to 5%, the structure contains dislocation loops, the interweaving of elongated dislocations, single-layer stacking faults. At ε = 5%, the structure contains multilayer stacking faults and mechanical microtwins. At ε > 5%, there is an intense microtwinning with no long dislocations and stacking faults. The most intense twinning develops in the range of deformation degrees of 5–20%, while the number of twins in the pack increases from 3–4 at ε = 10% to 6–8 at ε = 20%. When mechanical twinning is included, a cellular dislocation substructure begins to develop intensively. The cell size decreases from 700 nm at ε = 5% to 150 nm at ε = 40%. Twinning develops predominantly in systems with the largest Schmid factor and facilitates the dislocation glide. The results may be of interest to the researchers of the deformation processes of austenitic alloys.
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spelling pubmed-99637962023-02-26 Effect of the Dislocation Substructure Parameters of Hadfield Steel on Its Strain Hardening Russakova, Alyona Zhilkashinova, Almira Alontseva, Darya Abilev, Madi Khozhanov, Alexandr Zhilkashinova, Assel Materials (Basel) Article This article presents a study of changes in the microstructure of Hadfield steel depending on the tensile deformation and cold rolling with the strain/stress level. It has been established that the change in the “σ-ε” curve (at ε = 5%) is accompanied by a 1.5-times decrease in the strain-hardening coefficient. At ε = 0 to 5%, the structure contains dislocation loops, the interweaving of elongated dislocations, single-layer stacking faults. At ε = 5%, the structure contains multilayer stacking faults and mechanical microtwins. At ε > 5%, there is an intense microtwinning with no long dislocations and stacking faults. The most intense twinning develops in the range of deformation degrees of 5–20%, while the number of twins in the pack increases from 3–4 at ε = 10% to 6–8 at ε = 20%. When mechanical twinning is included, a cellular dislocation substructure begins to develop intensively. The cell size decreases from 700 nm at ε = 5% to 150 nm at ε = 40%. Twinning develops predominantly in systems with the largest Schmid factor and facilitates the dislocation glide. The results may be of interest to the researchers of the deformation processes of austenitic alloys. MDPI 2023-02-18 /pmc/articles/PMC9963796/ /pubmed/36837347 http://dx.doi.org/10.3390/ma16041717 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Russakova, Alyona
Zhilkashinova, Almira
Alontseva, Darya
Abilev, Madi
Khozhanov, Alexandr
Zhilkashinova, Assel
Effect of the Dislocation Substructure Parameters of Hadfield Steel on Its Strain Hardening
title Effect of the Dislocation Substructure Parameters of Hadfield Steel on Its Strain Hardening
title_full Effect of the Dislocation Substructure Parameters of Hadfield Steel on Its Strain Hardening
title_fullStr Effect of the Dislocation Substructure Parameters of Hadfield Steel on Its Strain Hardening
title_full_unstemmed Effect of the Dislocation Substructure Parameters of Hadfield Steel on Its Strain Hardening
title_short Effect of the Dislocation Substructure Parameters of Hadfield Steel on Its Strain Hardening
title_sort effect of the dislocation substructure parameters of hadfield steel on its strain hardening
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9963796/
https://www.ncbi.nlm.nih.gov/pubmed/36837347
http://dx.doi.org/10.3390/ma16041717
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