Experimental and Numerical investigation of  Ti-5Al-2V-2Fe Butt Joint’s Low-cycle Fatigue Properties under Different Laser Welding Input and Pulse Frequency

Experimental and Numerical investigation of Ti-5Al-2V-2Fe Butt Joint’s Low-cycle Fatigue Properties under Different Laser Welding Input and Pulse Frequency | 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 Experimental and Numerical investigation of Ti-5Al-2V-2Fe Butt Joint’s Low-cycle Fatigue Properties under Different Laser Welding Input and Pulse Frequency Zheng-tian Wang, Peihu Gao, Bai-Yang Chen, Qi-Bao Li, naumov Anton, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9234305/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 In this work, the low-cycle fatigue properties of Ti-5Al-2V-2Fe butt joints fabricated using continuous laser welding (CLW) and pulsed laser welding (PLW) were investigated employing a combination of numerical simulations and experiments. A three-dimensional transient numerical model was established to simulate molten pool dynamics and solidification behavior, enabling a comparative analysis of dynamic and solidification characteristics across different welding processes. At 1800 W laser power, the application of a 40 Hz PLW process enhanced grain refinement within the fusion zone. Joints fabricated at 2000 W 40 Hz PLW achieved the highest average fatigue life, attaining 84% of the base metal’s fatigue life. The simulated outcomes aligned with the actual experimental data. In comparison to continuous laser welding, pulsed laser welding was characterized by the formation of non-overlapping molten pool zones during solidification. These regions served to restrict grain growth and promote microstructural refinement. As the pulse frequency increased, the extent of the non-overlapping molten pool zones decreased accordingly. Low-cost titanium Laser welding Numerical simulation Fatigue Full Text Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 16 May, 2026 Reviewers invited by journal 01 May, 2026 Editor invited by journal 03 Apr, 2026 Editor assigned by journal 31 Mar, 2026 First submitted to journal 27 Mar, 2026 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-9234305","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":633005621,"identity":"c02b9f3f-0a9a-43c6-bdc6-5681a7190e0f","order_by":0,"name":"Zheng-tian Wang","email":"","orcid":"","institution":"Xi'an Technological University","correspondingAuthor":false,"prefix":"","firstName":"Zheng-tian","middleName":"","lastName":"Wang","suffix":""},{"id":633005622,"identity":"a70f5963-e222-41a5-9bef-9b6648ed92b6","order_by":1,"name":"Peihu 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A three-dimensional transient numerical model was established to simulate molten pool dynamics and solidification behavior, enabling a comparative analysis of dynamic and solidification characteristics across different welding processes. At 1800 W laser power, the application of a 40 Hz PLW process enhanced grain refinement within the fusion zone. Joints fabricated at 2000 W 40 Hz PLW achieved the highest average fatigue life, attaining 84% of the base metal\u0026rsquo;s fatigue life. The simulated outcomes aligned with the actual experimental data. In comparison to continuous laser welding, pulsed laser welding was characterized by the formation of non-overlapping molten pool zones during solidification. These regions served to restrict grain growth and promote microstructural refinement. 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