Study on the Methods and Mechanisms for Suppressing Porosity in Narrow Gap Oscillating Laser Wire-Fill Horizontal Welding

Study on the Methods and Mechanisms for Suppressing Porosity in Narrow Gap Oscillating Laser Wire-Fill Horizontal Welding | 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 Study on the Methods and Mechanisms for Suppressing Porosity in Narrow Gap Oscillating Laser Wire-Fill Horizontal Welding Zhen Dong Wu, Shi Yang Wang, Rui Sheng Huang, Jian Qin, Yuan Sun, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4903574/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 To address the research gap regarding the control of pore defects in narrow gap laser welded wire, this paper employs a combination of experimental analysis and finite element analysis to study the methods for suppressing pores and their related mechanisms in narrow gap laser welded wire. The research results indicate that increasing oscillation frequency in circular mode suppresses porosity. With a constant fill cross-sectional area, suppression is effective only above a certain threshold frequency, which increases with fill cross-sectional area, the relationship as follows: 9mm²-200Hz; 10.5mm²-250Hz; 12mm²-300Hz; 13.5mm²-350Hz. Mechanistically, a higher oscillation frequency transforms the keyhole shape from conical to bowl-shaped, enhancing stability and reducing bubble formation. Additionally, porosity is avoided when the aspect ratio is below the control threshold of 1.13. Narrow gap laser welding Oscillating laser welding Horizontal welding Porosity suppression Numerical simulation Full Text Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 04 Nov, 2024 Reviewers invited by journal 04 Nov, 2024 Editor invited by journal 05 Oct, 2024 Editor assigned by journal 03 Oct, 2024 First submitted to journal 02 Oct, 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-4903574","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":373969543,"identity":"feee135c-be6f-4ebb-a28f-cc87e2a31400","order_by":0,"name":"Zhen Dong 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The research results indicate that increasing oscillation frequency in circular mode suppresses porosity. With a constant fill cross-sectional area, suppression is effective only above a certain threshold frequency, which increases with fill cross-sectional area, the relationship as follows: 9mm\u0026sup2;-200Hz; 10.5mm\u0026sup2;-250Hz; 12mm\u0026sup2;-300Hz; 13.5mm\u0026sup2;-350Hz. Mechanistically, a higher oscillation frequency transforms the keyhole shape from conical to bowl-shaped, enhancing stability and reducing bubble formation. 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