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Article

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

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Department of Electrical Engineering, Automation and Informatics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
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Department of Mechanical Engineering, Faculty of Technology, Institute of Technology and Business in České Budějovice, Okružní 10, 370 01 České Budějovice, Czech Republic
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Department of Numerical Methods and Computational Modeling, Faculty of Industrial Technologies in Púchov, Alexander Dubček University of Trenčín, Ivana Krasku 491/30, 020 01 Púchov, Slovakia
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Department of Manufacturing Engineering, Machine Building Faculty, Technical University of Cluj-Napoca, B-dul Muncii no. 103–105, 400641 Cluj-Napoca, Romania
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Department of Machine Design, Faculty of Engineering, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
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Author to whom correspondence should be addressed.
Academic Editor: Werner Skrotzki
Materials 2021, 14(10), 2594; https://doi.org/10.3390/ma14102594
Received: 19 April 2021 / Revised: 11 May 2021 / Accepted: 15 May 2021 / Published: 16 May 2021
(This article belongs to the Special Issue Mechanical Properties of Technical Materials)
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. View Full-Text
Keywords: structural and mechanical changes; ECAP; extrusion; grain size; copper structural and mechanical changes; ECAP; extrusion; grain size; copper
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MDPI and ACS Style

Harničárová, M.; Valíček, J.; Kušnerová, M.; Palková, Z.; Kopal, I.; Borzan, C.; Kadnár, M.; Paulovič, S. A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations. Materials 2021, 14, 2594. https://doi.org/10.3390/ma14102594

AMA Style

Harničárová M, Valíček J, Kušnerová M, Palková Z, Kopal I, Borzan C, Kadnár M, Paulovič S. A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations. Materials. 2021; 14(10):2594. https://doi.org/10.3390/ma14102594

Chicago/Turabian Style

Harničárová, Marta, Jan Valíček, Milena Kušnerová, Zuzana Palková, Ivan Kopal, Cristina Borzan, Milan Kadnár, and Stanislav Paulovič. 2021. "A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations" Materials 14, no. 10: 2594. https://doi.org/10.3390/ma14102594

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