High-resolution thermal imaging for melt pool dynamics studies in welding processes

High-resolution thermal imaging for melt pool dynamics studies in welding processes | 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 High-resolution thermal imaging for melt pool dynamics studies in welding processes Vinicius Lemes Jorge, Issam Bendaoud, Fabien Soulié, Cyril Bordreuil This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5093258/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 5 You are reading this latest preprint version Abstract Challenges in terms of reliability still surround thermal measurement methods in welding processes. However, the temperature distribution within the weld pool can provide important resources for understanding behaviors and explaining phenomena. This work aims to study the effect of gravity orientation on the temperature distribution within the weld pool using an in-house developed equipment. First, a combination of optical settings and a calibration procedure were established. The thermal field from the back side of fully penetrated thin plates was accessed using the GTAW process. Experiments were carried out with the same welding parameters under flat, horizontal, vertical upward, and vertical downward positions. The device allowed a well-delimitated and detailed weld pool thermal field assessment. Along the transversal weld pool direction, a symmetrical heat distribution was stated in the flat position while an asymmetrical one in the others. Moreover, the thermal field supported the discussions concerning the driving forces, as it was possible to quantify dimensionless numbers and plot the Marangoni shear stress on the weld pool surface. Finally, through the developed equipment, it was possible to evaluate the impacts of gravity on the heat distribution within the weld pool and demonstrate its contribution to dynamics studies. Heat distribution shear stress thermal images Marangoni gravity welding position Full Text Supplementary Files Experiment1G.mp4 Experiment2G.mp4 Experiment3GD.mp4 Experiment3GU.mp4 Scaleforthevideos.tif Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 13 Nov, 2024 Reviewers invited by journal 12 Nov, 2024 Editor invited by journal 23 Sep, 2024 Editor assigned by journal 16 Sep, 2024 First submitted to journal 15 Sep, 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. 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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-5093258","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":377369242,"identity":"1b9e7bee-b57a-4d8b-a4ba-f499b37d7fe4","order_by":0,"name":"Vinicius Lemes 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