Size and build strategy effects for the L-PBF process applied to Inconel 625 vertical struts: a combined numerical and experimental approach

Size and build strategy effects for the L-PBF process applied to Inconel 625 vertical struts: a combined numerical and experimental approach | 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 Size and build strategy effects for the L-PBF process applied to Inconel 625 vertical struts: a combined numerical and experimental approach Patrice Peyre, Julien Rodrigues Da Silva, Zehoua Hamouche, Anne-Laure Helbert, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3868340/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 29 Apr, 2024 Read the published version in The International Journal of Advanced Manufacturing Technology → Version 1 posted 3 You are reading this latest preprint version Abstract A combined numerical and experimental analysis of melt-pool dimensions and resulting solidification conditions was carried out on small laser powder bed fusion (L-PBF) struts (0.2 mm to 2 mm diameters), considered as single constitutive parts of the structure lattice. In the beginning, the high-speed imaging monitoring of melt pools was performed on a dedicated instrumented L-PBF set-up for various scan strategies. In the subsequent stage, a numerical thermal model was employed on COMSOL Multiphysics® to determine the alteration of the melt pool by the struts' diameter and scanning strategy for constant (power, scan speed) conditions. A good agreement was obtained between experimental and numerical melt-pool areas. This allowed validation of calculated local cooling rates and thermal gradients near the solidification front. A clear difference was shown between outside-in or inside-out strategies, and contour-hatching in terms of local solidification conditions. Higher cooling rates were obtained for outside-in conditions, especially near the external part of struts whereas inside-out conditions promoted more uniform cooling rates and thermal gradients. Moreover, a reduction of strut diameter induced the formation of a single melt-pool on the full strut’s surface, which promoted lower and more uniform cooling rates and a highly textured built material. A fairly good agreement was found between simulated thermal data and local microstructure development at the scale of solidification cells. Finally, the current work provides a deeper understanding on size and L-PBF strategy versus microstructure formation, and allows adapting build conditions on strut diameters. Modeling L-PBF laser scan strategy microstructures struts Full Text Cite Share Download PDF Status: Published Journal Publication published 29 Apr, 2024 Read the published version in The International Journal of Advanced Manufacturing Technology → Version 1 posted Reviewers agreed at journal 20 Jan, 2024 Editor assigned by journal 19 Jan, 2024 First submitted to journal 18 Jan, 2024 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-3868340","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":268302310,"identity":"2947ef42-8fdb-4db2-9c43-6890dc943fde","order_by":0,"name":"Patrice 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In the beginning, the high-speed imaging monitoring of melt pools was performed on a dedicated instrumented L-PBF set-up for various scan strategies. In the subsequent stage, a numerical thermal model was employed on COMSOL Multiphysics\u0026reg; to determine the alteration of the melt pool by the struts' diameter and scanning strategy for constant (power, scan speed) conditions. A good agreement was obtained between experimental and numerical melt-pool areas. This allowed validation of calculated local cooling rates and thermal gradients near the solidification front. A clear difference was shown between outside-in or inside-out strategies, and contour-hatching in terms of local solidification conditions. Higher cooling rates were obtained for outside-in conditions, especially near the external part of struts whereas inside-out conditions promoted more uniform cooling rates and thermal gradients. Moreover, a reduction of strut diameter induced the formation of a single melt-pool on the full strut\u0026rsquo;s surface, which promoted lower and more uniform cooling rates and a highly textured built material. A fairly good agreement was found between simulated thermal data and local microstructure development at the scale of solidification cells. Finally, the current work provides a deeper understanding on size and L-PBF strategy versus microstructure formation, and allows adapting build conditions on strut diameters.\u003c/p\u003e","manuscriptTitle":"Size and build strategy effects for the L-PBF process applied to Inconel 625 vertical struts: a combined numerical and experimental approach","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-01-22 16:31:01","doi":"10.21203/rs.3.rs-3868340/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"reviewerAgreed","content":"","date":"2024-01-20T06:28:26+00:00","index":0,"fulltext":""},{"type":"editorAssigned","content":"","date":"2024-01-19T06:20:03+00:00","index":"","fulltext":""},{"type":"submitted","content":"The International Journal of Advanced Manufacturing Technology","date":"2024-01-18T06:06:58+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"the-international-journal-of-advanced-manufacturing-technology","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"jamt","sideBox":"Learn more about [The International Journal of Advanced Manufacturing Technology](https://www.springer.com/journal/170)","snPcode":"170","submissionUrl":"https://submission.nature.com/new-submission/170/3","title":"The International Journal of Advanced Manufacturing Technology","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"e9572123-8e27-4516-906d-81e478d191eb","owner":[],"postedDate":"January 22nd, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[],"tags":[],"updatedAt":"2024-05-01T23:27:48+00:00","versionOfRecord":{"articleIdentity":"rs-3868340","link":"https://doi.org/10.1007/s00170-024-13634-4","journal":{"identity":"the-international-journal-of-advanced-manufacturing-technology","isVorOnly":false,"title":"The International Journal of Advanced Manufacturing Technology"},"publishedOn":"2024-04-29 23:27:48","publishedOnDateReadable":"April 29th, 2024"},"versionCreatedAt":"2024-01-22 16:31:01","video":"","vorDoi":"10.1007/s00170-024-13634-4","vorDoiUrl":"https://doi.org/10.1007/s00170-024-13634-4","workflowStages":[]},"version":"v1","identity":"rs-3868340","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-3868340","identity":"rs-3868340","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}