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Influence of Decreased Temperature of Tensile Testing on the Annealing-Induced Hardening and Deformation-Induced Softening Effects in Ultrafine-Grained Al–0.4Zr Alloy

The influence of decreased temperature of tensile testing on annealing-induced hardening (AIH) and deformation-induced softening (DIS) effects has been studied in an ultrafine-grained (UFG) Al–Zr alloy produced by high-pressure torsion. We show that the UFG Al–Zr alloy demonstrates a DIS effect acco...

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Autores principales: Orlova, Tatiana S., Mavlyutov, Aydar M., Murashkin, Maxim Yu., Enikeev, Nariman A., Evstifeev, Alexey D., Sadykov, Dinislam I., Gutkin, Michael Yu.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9738656/
https://www.ncbi.nlm.nih.gov/pubmed/36499928
http://dx.doi.org/10.3390/ma15238429
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author Orlova, Tatiana S.
Mavlyutov, Aydar M.
Murashkin, Maxim Yu.
Enikeev, Nariman A.
Evstifeev, Alexey D.
Sadykov, Dinislam I.
Gutkin, Michael Yu.
author_facet Orlova, Tatiana S.
Mavlyutov, Aydar M.
Murashkin, Maxim Yu.
Enikeev, Nariman A.
Evstifeev, Alexey D.
Sadykov, Dinislam I.
Gutkin, Michael Yu.
author_sort Orlova, Tatiana S.
collection PubMed
description The influence of decreased temperature of tensile testing on annealing-induced hardening (AIH) and deformation-induced softening (DIS) effects has been studied in an ultrafine-grained (UFG) Al–Zr alloy produced by high-pressure torsion. We show that the UFG Al–Zr alloy demonstrates a DIS effect accompanied by a substantial increase in the elongation to failure δ (up to δ ≈ 30%) depending on the value of additional straining. Both the AIH and DIS effects weaken with a decrease in the tensile test temperature. The critical deformation temperatures were revealed at which the AIH and DIS effects are suppressed. The activation energy Q of plastic flow has been estimated for the UFG Al–Zr alloy in the as-processed, subsequently annealed and additionally strained states. It was shown that the annealing decreases the Q-value from ~80 kJ/mol to 23–28 kJ/mol, while the subsequent additional straining restores the initial Q-value. Alloying with Zr results in the expansion of the temperature range of the AIH effect manifestation to lower temperatures and results in the change in the Q-value in all of the studied states compared to the HPT-processed Al. The obtained Q-values and underlying flow mechanisms are discussed in correlation with specific microstructural features and in comparison to the UFG Al.
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spelling pubmed-97386562022-12-11 Influence of Decreased Temperature of Tensile Testing on the Annealing-Induced Hardening and Deformation-Induced Softening Effects in Ultrafine-Grained Al–0.4Zr Alloy Orlova, Tatiana S. Mavlyutov, Aydar M. Murashkin, Maxim Yu. Enikeev, Nariman A. Evstifeev, Alexey D. Sadykov, Dinislam I. Gutkin, Michael Yu. Materials (Basel) Article The influence of decreased temperature of tensile testing on annealing-induced hardening (AIH) and deformation-induced softening (DIS) effects has been studied in an ultrafine-grained (UFG) Al–Zr alloy produced by high-pressure torsion. We show that the UFG Al–Zr alloy demonstrates a DIS effect accompanied by a substantial increase in the elongation to failure δ (up to δ ≈ 30%) depending on the value of additional straining. Both the AIH and DIS effects weaken with a decrease in the tensile test temperature. The critical deformation temperatures were revealed at which the AIH and DIS effects are suppressed. The activation energy Q of plastic flow has been estimated for the UFG Al–Zr alloy in the as-processed, subsequently annealed and additionally strained states. It was shown that the annealing decreases the Q-value from ~80 kJ/mol to 23–28 kJ/mol, while the subsequent additional straining restores the initial Q-value. Alloying with Zr results in the expansion of the temperature range of the AIH effect manifestation to lower temperatures and results in the change in the Q-value in all of the studied states compared to the HPT-processed Al. The obtained Q-values and underlying flow mechanisms are discussed in correlation with specific microstructural features and in comparison to the UFG Al. MDPI 2022-11-26 /pmc/articles/PMC9738656/ /pubmed/36499928 http://dx.doi.org/10.3390/ma15238429 Text en © 2022 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
Orlova, Tatiana S.
Mavlyutov, Aydar M.
Murashkin, Maxim Yu.
Enikeev, Nariman A.
Evstifeev, Alexey D.
Sadykov, Dinislam I.
Gutkin, Michael Yu.
Influence of Decreased Temperature of Tensile Testing on the Annealing-Induced Hardening and Deformation-Induced Softening Effects in Ultrafine-Grained Al–0.4Zr Alloy
title Influence of Decreased Temperature of Tensile Testing on the Annealing-Induced Hardening and Deformation-Induced Softening Effects in Ultrafine-Grained Al–0.4Zr Alloy
title_full Influence of Decreased Temperature of Tensile Testing on the Annealing-Induced Hardening and Deformation-Induced Softening Effects in Ultrafine-Grained Al–0.4Zr Alloy
title_fullStr Influence of Decreased Temperature of Tensile Testing on the Annealing-Induced Hardening and Deformation-Induced Softening Effects in Ultrafine-Grained Al–0.4Zr Alloy
title_full_unstemmed Influence of Decreased Temperature of Tensile Testing on the Annealing-Induced Hardening and Deformation-Induced Softening Effects in Ultrafine-Grained Al–0.4Zr Alloy
title_short Influence of Decreased Temperature of Tensile Testing on the Annealing-Induced Hardening and Deformation-Induced Softening Effects in Ultrafine-Grained Al–0.4Zr Alloy
title_sort influence of decreased temperature of tensile testing on the annealing-induced hardening and deformation-induced softening effects in ultrafine-grained al–0.4zr alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9738656/
https://www.ncbi.nlm.nih.gov/pubmed/36499928
http://dx.doi.org/10.3390/ma15238429
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