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A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations

The formulation of the Hall–Petch relationship in the early 1950s has raised immense interest in studying the influence of the grain size of solid materials on their properties. Grain refinement can be achieved through extreme deformation. In the presented study, Equal-Channel Angular Pressing (ECAP...

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Autores principales: Harničárová, Marta, Valíček, Jan, Kušnerová, Milena, Palková, Zuzana, Kopal, Ivan, Borzan, Cristina, Kadnár, Milan, Paulovič, Stanislav
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8156885/
https://www.ncbi.nlm.nih.gov/pubmed/34065770
http://dx.doi.org/10.3390/ma14102594
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author Harničárová, Marta
Valíček, Jan
Kušnerová, Milena
Palková, Zuzana
Kopal, Ivan
Borzan, Cristina
Kadnár, Milan
Paulovič, Stanislav
author_facet Harničárová, Marta
Valíček, Jan
Kušnerová, Milena
Palková, Zuzana
Kopal, Ivan
Borzan, Cristina
Kadnár, Milan
Paulovič, Stanislav
author_sort Harničárová, Marta
collection PubMed
description The formulation of the Hall–Petch relationship in the early 1950s has raised immense interest in studying the influence of the grain size of solid materials on their properties. Grain refinement can be achieved through extreme deformation. In the presented study, Equal-Channel Angular Pressing (ECAP) was successfully applied to produce an ultrafine-grained microstructure in a pure commercial Cu of 99.9 wt%. Samples were processed by ECAP at 21 °C for six passes via route A. A new equation of equilibrium that allows the exact determination of the number of extrusions and other technological parameters required to achieve the desired final grain size has been developed. The presented research also deals, in a relatively detailed and comparative way, with the use of ultrasound. In this context, a very close correlation between the process functions of extrusion and the speed of longitudinal ultrasonic waves was confirmed.
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spelling pubmed-81568852021-05-28 A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations Harničárová, Marta Valíček, Jan Kušnerová, Milena Palková, Zuzana Kopal, Ivan Borzan, Cristina Kadnár, Milan Paulovič, Stanislav Materials (Basel) Article The formulation of the Hall–Petch relationship in the early 1950s has raised immense interest in studying the influence of the grain size of solid materials on their properties. Grain refinement can be achieved through extreme deformation. In the presented study, Equal-Channel Angular Pressing (ECAP) was successfully applied to produce an ultrafine-grained microstructure in a pure commercial Cu of 99.9 wt%. Samples were processed by ECAP at 21 °C for six passes via route A. A new equation of equilibrium that allows the exact determination of the number of extrusions and other technological parameters required to achieve the desired final grain size has been developed. The presented research also deals, in a relatively detailed and comparative way, with the use of ultrasound. In this context, a very close correlation between the process functions of extrusion and the speed of longitudinal ultrasonic waves was confirmed. MDPI 2021-05-16 /pmc/articles/PMC8156885/ /pubmed/34065770 http://dx.doi.org/10.3390/ma14102594 Text en © 2021 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
Harničárová, Marta
Valíček, Jan
Kušnerová, Milena
Palková, Zuzana
Kopal, Ivan
Borzan, Cristina
Kadnár, Milan
Paulovič, Stanislav
A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations
title A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations
title_full A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations
title_fullStr A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations
title_full_unstemmed A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations
title_short A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations
title_sort new method of predicting the structural and mechanical change of materials during extrusion by the method of multiple plastic deformations
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8156885/
https://www.ncbi.nlm.nih.gov/pubmed/34065770
http://dx.doi.org/10.3390/ma14102594
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