Corrosion resistant and tough multi-principal element Cr-Co-Ni alloys

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dc.contributor.authorKoga, Guilherme Yuuki
dc.contributor.authorBirbilis, Nick
dc.contributor.authorZepon, Guilherme
dc.contributor.authorKiminami, Claudio Shyinti
dc.contributor.authorBotta, Walter Jose
dc.contributor.authorKaufman, Michael
dc.contributor.authorClarke, Amy
dc.contributor.authorCoury, Francisco Gil
dc.date.accessioned2023-03-17T00:48:34Z
dc.date.issued2021
dc.date.updated2022-01-09T07:18:25Z
dc.description.abstractCr-Co-Ni Multi-Principal Element Alloys (MPEAs) with good combinations of strength and ductility were studied to determine their attendant corrosion performance. Three alloys – Cr45Co27.5Ni27.5, Cr33.3Co33.3Ni33.3, and Cr25Co37.5Ni37.5 – were produced in recrystallized and cold-worked states, and their electrochemical response was tested in a simulated seawater electrolyte. Increasing the Cr content improved the yield strength (σy) and ultimate tensile strength (UTS), while maintaining high (>40%) uniform elongation. Potentiodynamic polarization and electrochemical impedance spectroscopy revealed high corrosion resistance of the alloys in simulated seawater, in particular the Cr-rich alloy (Cr45Co27.5Ni27.5). Furthermore, following 40% cold work, the Cr45Co27.5Ni27.5 alloy displayed a further improvement in corrosion resistance. The Cr45Co27.5Ni27.5 alloy displays mechanical and corrosion properties that exceed those of conventional structural alloys such as Ni-superalloys, stainless steels and most 3d-transition metal MPEAs, including those without appreciable ductility. Therefore, in the present work it is shown that increasing the Cr content in Cr-Co-Ni alloys leads to a better combination of mechanical properties and corrosion resistance in saline environment, as observed especially for the Cr45Co27.5Ni27.5 alloy.en_AU
dc.description.sponsorshipThis work was supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico - Brasil (CNPq) [grant number 424645/2018-1 and grant number 406765/2018-9], and by Coordenação de Aperfeiçoamento de Pessoal de Nível Superio rasil (CAPES) – Finance Code 001. The authors are also thankful to Eng. Rômulo Moreno and Villares Metals for providing the Inconel 625 for this study. AJC acknowledges the U.S. Department of the Navy, Office of Naval Research [Award No. N00014-18-1-2567] and MJK acknowledges the Center for Advanced Non-Ferrous Structural Alloys (CANFSA), a National Science Foundation Industry/University Cooperative Research Center (I/UCRC) [Award No. 1624836], at the Colorado School of Mines during the preparation of this manuscript. This work was supported by FAPESP (thematic project, Grant Number [2013/05987-8])en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0925-8388en_AU
dc.identifier.urihttp://hdl.handle.net/1885/287142
dc.language.isoen_AUen_AU
dc.publisherElsevieren_AU
dc.rights© 2021 Elsevier B.V.en_AU
dc.sourceJournal of Alloys and Compoundsen_AU
dc.subjectHigh entropy alloysen_AU
dc.subjectCompositionally complex alloysen_AU
dc.subjectMulti-principal element alloysen_AU
dc.subjectCorrosionen_AU
dc.subjectToughnessen_AU
dc.subjectMarineen_AU
dc.titleCorrosion resistant and tough multi-principal element Cr-Co-Ni alloysen_AU
dc.typeJournal articleen_AU
local.bibliographicCitation.lastpage10en_AU
local.bibliographicCitation.startpage1en_AU
local.contributor.affiliationKoga, Guilherme Yuuki, Federal University of São Carlos, Department of Materials Science and Engineeringen_AU
local.contributor.affiliationBirbilis, Nick, College of Engineering and Computer Science, ANUen_AU
local.contributor.affiliationZepon, Guilherme, Federal University of São Carlos, Department of Materials Science and Engineeringen_AU
local.contributor.affiliationKiminami, Claudio Shyinti, Federal University of São Carlos, Department of Materials Science and Engineeringen_AU
local.contributor.affiliationBotta, Walter Jose, Federal University of São Carlos, Department of Materials Science and Engineeringen_AU
local.contributor.affiliationKaufman, Michael, Colorado School of Minesen_AU
local.contributor.affiliationClarke, Amy, Colorado School of Minesen_AU
local.contributor.affiliationCoury, Francisco Gil, Federal University of São Carlos, Department of Materials Science and Engineeringen_AU
local.contributor.authoremailu1066695@anu.edu.auen_AU
local.contributor.authoruidBirbilis, Nick, u1066695en_AU
local.description.embargo2099-12-31
local.description.notesImported from ARIESen_AU
local.identifier.absfor401600 - Materials engineeringen_AU
local.identifier.ariespublicationa383154xPUB20946en_AU
local.identifier.citationvolume884en_AU
local.identifier.doi10.1016/j.jallcom.2021.161107en_AU
local.identifier.scopusID2-s2.0-85111271238
local.identifier.uidSubmittedBya383154en_AU
local.publisher.urlhttps://www.elsevier.com/en-auen_AU
local.type.statusPublished Versionen_AU

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