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Role of copper on L12 precipitation strengthened fcc based high entropy alloy

hal.structure.identifierAdvanced Materials and Manufacturing Processes Institute
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorGWALANI, Bharat
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGORSSE, Stéphane
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorSONI, Vishal
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorCARL, Matthew
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorLEY, Nathen
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorSMITH, Jesse
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorAYYAGARI, Aditya
hal.structure.identifierPacific Northwest National Laboratory [PNNL]
dc.contributor.authorZHENG, Yufeng
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorYOUNG, Marcus
hal.structure.identifierAdvanced Materials and Manufacturing Processes Institute
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorMISHRA, Rajiv
hal.structure.identifierAdvanced Materials and Manufacturing Processes Institute
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorBANERJEE, R.
dc.date.issued2019-06
dc.identifier.issn2589-1529
dc.description.abstractEnA novel face-centered cubic (fcc)-based precipitation-hardenable high entropy alloy (HEA) or more broadly termed complex concentrated alloy (CCA) has been designed by coupling the beneficial effects of adding small amounts of Ti and Cu to the base alloy, Al0.3CoCrFeNi. While previous work has shown that large concentrations of Cu in fcc HEAs based on CoCrFeNi can lead to embrittlement, the present study clearly shows that in small amounts this alloying element can be quite beneficial, since Cu stabilizes the ordered L12 (gamma prime) phase, and acts as a heterogeneous nucleation site for this ordered phase within the fcc matrix. Additionally, Ti also stabilizes the L12 phase, increasing its volume fraction. This novel precipitation-hardened HEA/CCA, with a nominal composition of Al0.3Cu0.3Ti0.2CoCrFeNi, exhibits yield and ultimate tensile strengths of 820 MPa and 1100 MPa at room temperature respectively, while retaining a tensile ductility of nearly 20% and an extraordinarily high strain hardening rate ∼ 2700 MPa, a rather unique balance of properties for an fcc-based austenitic alloy.
dc.language.isoen
dc.publisherElsevier
dc.subject.enCu clusters
dc.subject.enPrecipitation strengthening
dc.subject.enAtom probe tomography
dc.subject.enHigh entropy alloy
dc.title.enRole of copper on L12 precipitation strengthened fcc based high entropy alloy
dc.typeArticle de revue
dc.identifier.doi10.1016/j.mtla.2019.100282
dc.subject.halChimie/Matériaux
bordeaux.journalMaterialia
bordeaux.page100282 (13 p.)
bordeaux.volume6
bordeaux.peerReviewedoui
hal.identifierhal-02082762
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02082762v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Materialia&rft.date=2019-06&rft.volume=6&rft.spage=100282%20(13%20p.)&rft.epage=100282%20(13%20p.)&rft.eissn=2589-1529&rft.issn=2589-1529&rft.au=GWALANI,%20Bharat&GORSSE,%20St%C3%A9phane&SONI,%20Vishal&CARL,%20Matthew&LEY,%20Nathen&rft.genre=article


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