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Engineering multi-scale B2 precipitation in a heterogeneous FCC based microstructure to enhance the mechanical properties of a Al0.5Co1.5CrFeNi1.5 high entropy alloy

hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorDASARI, Sriswaroop
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorJAGETIA, Abhinav
hal.structure.identifierDepartment of Materials Science and Engineering
hal.structure.identifierHigh Entropy Materials Center
dc.contributor.authorCHANG, Y.-J.
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorSONI, Vishal
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, S.
hal.structure.identifierDepartment of Materials Science and Engineering
hal.structure.identifierHigh Entropy Materials Center
dc.contributor.authorYEH, A.-C.
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorBANERJEE, Rajarshi
dc.date.issued2020
dc.identifier.issn0925-8388
dc.description.abstractEnWhile ordered L12 or gamma prime precipitates in face centered cubic (FCC) based microstructures have been extensively used for strengthening nickel or cobalt base superalloys, and more recently in high entropy alloys (HEAs) or complex concentrated alloys (CCAs), the possibility of exploiting ordered B2 precipitates in FCC-based systems has been relatively less investigated. The present study shows the propensity of developing a heterogeneous microstructure, consisting of two different distributions of FCC grain sizes, and two different size scales of B2 precipitates, within an FCC-based Al0.5Co1.5CrFeNi1.5 HEA/CCA. This alloy composition has been designed using solution thermodynamics-based modeling such that it has a high phase fraction and solvus temperature of the B2 phase. The resulting heterogenous microstructure exhibited an approximately 400% increase in yield strength with respect to the single-phase FCC solid solution condition of the same alloy while maintaining very good tensile ductility ∼20%.
dc.language.isoen
dc.publisherElsevier
dc.subject.enHigh entropy alloys
dc.subject.enComplex concentrated alloys
dc.subject.enHeterogenous microstructure
dc.subject.enIntermetallic precipitates
dc.subject.enMechanical properties
dc.title.enEngineering multi-scale B2 precipitation in a heterogeneous FCC based microstructure to enhance the mechanical properties of a Al0.5Co1.5CrFeNi1.5 high entropy alloy
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jallcom.2020.154707
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Alloys and Compounds
bordeaux.page154707
bordeaux.volume830
bordeaux.peerReviewedoui
hal.identifierhal-02635091
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02635091v1
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