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Enhanced tensile yield strength in laser additively manufactured Al0.3CoCrFeNi high entropy alloy

hal.structure.identifierAdvanced Materials and Manufacturing Processes Institute
hal.structure.identifierCenter for Agile and Adaptive Manufacturing [CAAAM]
dc.contributor.authorNARTU, Mohan Sai Kiran Kumar Yadav
hal.structure.identifierAdvanced Materials and Manufacturing Processes Institute
hal.structure.identifierCenter for Agile and Adaptive Manufacturing [CAAAM]
dc.contributor.authorALAM, Talukder
hal.structure.identifierAdvanced Materials and Manufacturing Processes Institute
hal.structure.identifierCenter for Agile and Adaptive Manufacturing [CAAAM]
dc.contributor.authorDASARI, Sriswaroop
hal.structure.identifierAdvanced Materials and Manufacturing Processes Institute
hal.structure.identifierCenter for Agile and Adaptive Manufacturing [CAAAM]
dc.contributor.authorMANTRI, Srinivas Aditya
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGORSSE, Stéphane
hal.structure.identifierAdvanced Materials and Manufacturing Processes Institute
hal.structure.identifierDepartment of Engineering Technology
dc.contributor.authorSILLER, Hector
hal.structure.identifierCenter for Agile and Adaptive Manufacturing [CAAAM]
dc.contributor.authorDAHOTRE, Narendra
hal.structure.identifierAdvanced Materials and Manufacturing Processes Institute
hal.structure.identifierCenter for Agile and Adaptive Manufacturing [CAAAM]
dc.contributor.authorBANERJEE, Rajarshi
dc.date.issued2020
dc.identifier.issn2589-1529
dc.description.abstractEnA precipitation strengthenable high entropy alloy (HEA), Al0.3CoCrFeNi, was processed via laser-based additive manufacturing (AM), using the laser engineered net shaping (LENS) process. The as LENS processed HEA exhibited twice the tensile yield strength, as compared to the conventionally arc-melted and solution treated HEA of the same composition, with a tensile ductility greater than 20%. Subsequent heat-treatments of the AM HEA alloy led to further enhancement of the yield strength while maintaining good tensile ductility. The microstructure of these AM alloys was investigated by coupling transmission electron microscopy (TEM) and atom probe tomography (APT). The near doubling of the yield strength in case of the as AM processed HEA samples, which were devoid of second phase intermetallic precipitates, has been rationalized based on the formation of nanometer-scale Al–Ni rich solute clusters due to the re-heating of the deposited layers during AM. The enhanced yield strength due to these solute clusters has been estimated using a simple cluster-dislocation interaction model involving the coherency strain fields of these nano-clusters. The even higher yield strength in case of the heat-treated AM HEA samples has been quantitatively rationalized employing precipitation strengthening models, based on nanometer scale L12 (gamma prime) precipitates.
dc.language.isoen
dc.publisherElsevier
dc.subject.enAdditive Manufacturing
dc.subject.enStrenghtening Models
dc.subject.enHigh Entropy Alloys
dc.subject.enAtom Probe Tomography
dc.title.enEnhanced tensile yield strength in laser additively manufactured Al0.3CoCrFeNi high entropy alloy
dc.typeArticle de revue
dc.identifier.doi10.1016/j.mtla.2019.100522
dc.subject.halSciences de l'ingénieur [physics]/Matériaux
bordeaux.journalMaterialia
bordeaux.page100522 (9 p.)
bordeaux.volume9
bordeaux.peerReviewedoui
hal.identifierhal-02394470
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02394470v1
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