Influence of Al addition on microstructure and electrochemical behaviour of CrMnFeCoNi high-entropy alloy

Simple item page
dc.contributor.authorArmendariz, Lorea
dc.contributor.authorCastrillejo, Lucia
dc.contributor.authorVicario, Iban
dc.contributor.authorGordo-Burgoa, Olaia
dc.contributor.authorGuraya, Teresa
dc.contributor.institutionPROMETAL
dc.date.accessioned2024-09-06T10:35:02Z
dc.date.available2024-09-06T10:35:02Z
dc.date.issued2024-05-01
dc.descriptionPublisher Copyright: © 2024 The Authors
dc.description.abstractTo develop new corrosion-resistant materials for structural applications, CrMnFeCoNiAlx high-entropy alloys (HEAs) are produced via semi-industrial induction casting. The study aimed to investigate the influence of Al content (x = 0–0.3) on both microstructure evolution and corrosion properties of the alloys. X-ray diffraction and scanning electron microscopy (SEM) analysis revealed that all the alloys exhibited a single-phase face-centered cubic structure, with dendritic (Fe, Co, Cr-rich) and interdendritic (Mn, Ni, Al-rich) regions distinguished by elemental segregations. Furthermore, the incorporation of Al atoms into the solid solution led to an increase in the lattice parameter, indicating alloy strengthening. The corrosion resistance of the CrMnFeCoNiAlx alloy improved with higher Al addition. Electrochemical polarisation tests demonstrated a slight increase in the corrosion potential (Ecorr) and a significant decrease in the corrosion current density (icorr) upon Al addition. Additionally, slower kinetics for pit nucleation (higher E'corr) were observed, particularly notable for x = 0.3. Analysis of the corroded surfaces revealed a mixed degradation mechanism, involving pitting corrosion and selective dissolution of the interdendritic zone, which decreased as the Al content of the HEA increased. These findings underscore the effectiveness of Al addition in not only enhancing the mechanical properties of the Cantor alloy through solid solution strengthening, but also improving its corrosion resistance.en
dc.description.statusPeer reviewed
dc.identifier.citationArmendariz , L , Castrillejo , L , Vicario , I , Gordo-Burgoa , O & Guraya , T 2024 , ' Influence of Al addition on microstructure and electrochemical behaviour of CrMnFeCoNi high-entropy alloy ' , Materials Chemistry and Physics , vol. 318 , 129316 . https://doi.org/10.1016/j.matchemphys.2024.129316
dc.identifier.doi10.1016/j.matchemphys.2024.129316
dc.identifier.issn0254-0584
dc.identifier.urihttps://hdl.handle.net/11556/4910
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85190068593&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofMaterials Chemistry and Physics
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subject.keywordsAl addition
dc.subject.keywordsCorrosion properties
dc.subject.keywordsCrMnFeCoNiAl
dc.subject.keywordsHigh-entropy alloy
dc.subject.keywordsInduction casting
dc.subject.keywordsMicrostructure
dc.subject.keywordsGeneral Materials Science
dc.subject.keywordsCondensed Matter Physics
dc.titleInfluence of Al addition on microstructure and electrochemical behaviour of CrMnFeCoNi high-entropy alloyen
dc.typejournal article
Files