Influence of composition and annealing heat-treatment on the microstructural of TiVNbCr based High entropy alloys

Influence of composition and annealing heat-treatment on the microstructural of TiVNbCr based High entropy alloys | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Influence of composition and annealing heat-treatment on the microstructural of TiVNbCr based High entropy alloys Bongani Seeke Ramatsoma, Elizabeth Mamookho Makhatha, Desmond Edem Primus Klenam, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8481259/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract In this study, TiVNbCr-based HEAs with Fe and Mn additions were produced by vacuum arc melting and subjected to heat treatment to investigate the influence of alloying and thermal processing on microstructures. CALPHAD calculations, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) were employed to evaluate the microstructural characteristics. Results revealed that as-cast alloys predominantly exhibited body-centered cubic (BCC) dendrite regions with minimal to none interdendritic Laves phases, while Fe and Mn-rich compositions favored increased stabilization of C14 Laves phases. Heat treatment at 750°C enhanced atomic diffusion, promoting solute redistribution and significant growth of Laves phases, particularly in alloys enriched with Nb, Cr, Fe, and Mn. The findings highlight the critical role of composition and heat treatment in tailoring BCC/Laves phase balance within HEAS, offering pathways for designing HEAs with optimized hydrogen storage capacity, kinetics, and reversibility. High entropy alloys BCC Laves phase Hydrogen storage and Intermetallics Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8481259","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":576669695,"identity":"451a7723-e0c7-41bc-b94f-e0e51dd30576","order_by":0,"name":"Bongani Seeke 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alloys","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"High entropy alloys BCC, Laves phase, Hydrogen storage, and Intermetallics","lastPublishedDoi":"10.21203/rs.3.rs-8481259/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8481259/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eIn this study, TiVNbCr-based HEAs with Fe and Mn additions were produced by vacuum arc melting and subjected to heat treatment to investigate the influence of alloying and thermal processing on microstructures. CALPHAD calculations, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) were employed to evaluate the microstructural characteristics. Results revealed that as-cast alloys predominantly exhibited body-centered cubic (BCC) dendrite regions with minimal to none interdendritic Laves phases, while Fe and Mn-rich compositions favored increased stabilization of C14 Laves phases. Heat treatment at 750\u0026deg;C enhanced atomic diffusion, promoting solute redistribution and significant growth of Laves phases, particularly in alloys enriched with Nb, Cr, Fe, and Mn. The findings highlight the critical role of composition and heat treatment in tailoring BCC/Laves phase balance within HEAS, offering pathways for designing HEAs with optimized hydrogen storage capacity, kinetics, and reversibility.\u003c/p\u003e","manuscriptTitle":"Influence of composition and annealing heat-treatment on the microstructural of TiVNbCr based High entropy alloys","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-01-21 13:04:56","doi":"10.21203/rs.3.rs-8481259/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"10f37ff8-6d84-4f0b-8821-5252824c6341","owner":[],"postedDate":"January 21st, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2026-02-10T08:26:12+00:00","versionOfRecord":[],"versionCreatedAt":"2026-01-21 13:04:56","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-8481259","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8481259","identity":"rs-8481259","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}