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Variations of the Elastic Properties of the CoCrFeMnNi High Entropy Alloy Deformed by Groove Cold Rolling

The variations of the mechanical properties of the CoCrFeMnNi high entropy alloy (HEA) during groove cold rolling process were investigated with the aim of understanding their correlation relationships with the crystallographic texture. Our study revealed divergences in the variations of the microha...

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Autores principales: Lohmuller, Paul, Peltier, Laurent, Hazotte, Alain, Zollinger, Julien, Laheurte, Pascal, Fleury, Eric
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6119952/
https://www.ncbi.nlm.nih.gov/pubmed/30072603
http://dx.doi.org/10.3390/ma11081337
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author Lohmuller, Paul
Peltier, Laurent
Hazotte, Alain
Zollinger, Julien
Laheurte, Pascal
Fleury, Eric
author_facet Lohmuller, Paul
Peltier, Laurent
Hazotte, Alain
Zollinger, Julien
Laheurte, Pascal
Fleury, Eric
author_sort Lohmuller, Paul
collection PubMed
description The variations of the mechanical properties of the CoCrFeMnNi high entropy alloy (HEA) during groove cold rolling process were investigated with the aim of understanding their correlation relationships with the crystallographic texture. Our study revealed divergences in the variations of the microhardness and yield strength measured from samples deformed by groove cold rolling and conventional cold rolling processes. The crystallographic texture analyzed by electron back scattered diffraction (EBSD) revealed a hybrid texture between those obtained by conventional rolling and drawing processes. Though the groove cold rolling process induced a marked strengthening effect in the CoCrFeMnNi HEA, the mechanical properties were also characterized by an unusual decrease of the Young’s modulus as the applied groove cold rolled deformation increased up to about 0.5 before reaching a stabilized value. This decrease of the Young’s modulus was attributed to the increased density of mobile dislocations induced by work hardening during groove cold rolling processing.
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spelling pubmed-61199522018-09-05 Variations of the Elastic Properties of the CoCrFeMnNi High Entropy Alloy Deformed by Groove Cold Rolling Lohmuller, Paul Peltier, Laurent Hazotte, Alain Zollinger, Julien Laheurte, Pascal Fleury, Eric Materials (Basel) Article The variations of the mechanical properties of the CoCrFeMnNi high entropy alloy (HEA) during groove cold rolling process were investigated with the aim of understanding their correlation relationships with the crystallographic texture. Our study revealed divergences in the variations of the microhardness and yield strength measured from samples deformed by groove cold rolling and conventional cold rolling processes. The crystallographic texture analyzed by electron back scattered diffraction (EBSD) revealed a hybrid texture between those obtained by conventional rolling and drawing processes. Though the groove cold rolling process induced a marked strengthening effect in the CoCrFeMnNi HEA, the mechanical properties were also characterized by an unusual decrease of the Young’s modulus as the applied groove cold rolled deformation increased up to about 0.5 before reaching a stabilized value. This decrease of the Young’s modulus was attributed to the increased density of mobile dislocations induced by work hardening during groove cold rolling processing. MDPI 2018-08-02 /pmc/articles/PMC6119952/ /pubmed/30072603 http://dx.doi.org/10.3390/ma11081337 Text en © 2018 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lohmuller, Paul
Peltier, Laurent
Hazotte, Alain
Zollinger, Julien
Laheurte, Pascal
Fleury, Eric
Variations of the Elastic Properties of the CoCrFeMnNi High Entropy Alloy Deformed by Groove Cold Rolling
title Variations of the Elastic Properties of the CoCrFeMnNi High Entropy Alloy Deformed by Groove Cold Rolling
title_full Variations of the Elastic Properties of the CoCrFeMnNi High Entropy Alloy Deformed by Groove Cold Rolling
title_fullStr Variations of the Elastic Properties of the CoCrFeMnNi High Entropy Alloy Deformed by Groove Cold Rolling
title_full_unstemmed Variations of the Elastic Properties of the CoCrFeMnNi High Entropy Alloy Deformed by Groove Cold Rolling
title_short Variations of the Elastic Properties of the CoCrFeMnNi High Entropy Alloy Deformed by Groove Cold Rolling
title_sort variations of the elastic properties of the cocrfemnni high entropy alloy deformed by groove cold rolling
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6119952/
https://www.ncbi.nlm.nih.gov/pubmed/30072603
http://dx.doi.org/10.3390/ma11081337
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