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Ceramic-reinforced HEA matrix composites exhibiting an excellent combination of mechanical properties

dc.contributor.authorMehmood, M. Adil
dc.contributor.authorShehzad, Khurram
dc.contributor.authorMujahid, M.
dc.contributor.authorYaqub, Talha Bin
dc.contributor.authorGodfrey, Andy
dc.contributor.authorFernandes, Filipe
dc.contributor.authorMuhammad, F. Z.
dc.contributor.authorYaqoob, Khurram
dc.date.accessioned2023-01-30T16:17:09Z
dc.date.available2023-01-30T16:17:09Z
dc.date.issued2022
dc.description.abstractCoCrFeNi is a well-studied face centered cubic (fcc) high entropy alloy (HEA) that exhibits excellent ductility but only limited strength. The present study focusses on improving the strength-ductility balance of this HEA by addition of varying amounts of SiC using an arc melting route. Chromium present in the base HEA is found to result in decomposition of SiC during melting. Consequently, interaction of free carbon with chromium results in the in-situ formation of chromium carbide, while free silicon remains in solution in the base HEA and/or interacts with the constituent elements of the base HEA to form silicides. The changes in microstructural phases with increasing amount of SiC are found to follow the sequence: fcc → fcc + eutectic → fcc + chromium carbide platelets → fcc + chromium carbide platelets + silicides → fcc + chromium carbide platelets + silicides + graphite globules/flakes. In comparison to both conventional and high entropy alloys, the resulting composites were found to exhibit a very wide range of mechanical properties (yield strength from 277 MPa with more than 60% elongation to 2522 MPa with 6% elongation). Some of the developed high entropy composites showed an outstanding combination of mechanical properties (yield strength 1200 MPa with 37% elongation) and occupied previously unattainable regions in a yield strength versus elongation map. In addition to their significant elongation, the hardness and yield strength of the HEA composites are found to lie in the same range as those of bulk metallic glasses. It is therefore believed that development of high entropy composites can help in obtaining outstanding combinations of mechanical properties for advanced structural applications.pt_PT
dc.description.sponsorshipFinancial support from the Higher Education Commission of Pakistan (HEC NRPU 6019) is acknowledged. FEDER National funds FCT under the project CEMMPRE, ref. “UIDB/00285/2020” is also acknowledged.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1038/s41598-022-25734-wpt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/22014
dc.language.isoengpt_PT
dc.publisherSpringer Naturept_PT
dc.relationCentre for Mechanical Enginnering, Materials and Processes
dc.relation.publisherversionhttps://www.nature.com/articles/s41598-022-25734-wpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.titleCeramic-reinforced HEA matrix composites exhibiting an excellent combination of mechanical propertiespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Mechanical Enginnering, Materials and Processes
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00285%2F2020/PT
oaire.citation.issue1pt_PT
oaire.citation.titleScientific Reportspt_PT
oaire.citation.volume12pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameFernandes
person.givenNameFilipe
person.identifier995468
person.identifier.ciencia-id2113-A18B-EEE8
person.identifier.orcid0000-0003-4035-3241
person.identifier.scopus-author-id55644767300
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationf3fb450f-5f22-4f0c-8916-7742d519f6af
relation.isAuthorOfPublication.latestForDiscoveryf3fb450f-5f22-4f0c-8916-7742d519f6af
relation.isProjectOfPublicatione9972dd7-ceaf-49ee-959a-d2a0e393b124
relation.isProjectOfPublication.latestForDiscoverye9972dd7-ceaf-49ee-959a-d2a0e393b124

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