Microstructure and mechanical properties of steel/aluminum circular oscillation laser welded joint

Microstructure and mechanical properties of steel/aluminum circular oscillation laser welded joint | 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 Microstructure and mechanical properties of steel/aluminum circular oscillation laser welded joint Tian Li, Youruiling Yan, Qiang Guo, Dianwu Zhou This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6987735/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 The lap welding experiments of DP590 dual phase steel and 6022 aluminum alloys were carried out by using circular oscillation laser. The mechanism of circular oscillation on the morphology, element distribution, grain size and mechanical properties of the molten pool was investigated through characterization experiments, theoretical calculations, numerical simulations and synchronous detection methods. The results showed that under the same heat input, the circular oscillation caused the heat to accumulate at the reversal point, forming an asymmetric "double molten pool" and increasing the bonding surface area. The metallurgical reaction between Fe and Al was suppressed by reducing the linear energy, and the layer thickness and phase composition of the interfacial intermetallic compounds (IMCs) were effectively regulated. The drag force generated by the "mango shaped" flow field improved the flow behavior of the molten pool, significantly enhancing the uniformity of element distribution and avoiding the formation of component segregation and solidification cracks. Based on the stirring effect of vortex, columnar crystals were broken and the temperature gradient was reduced to increase the nucleation point of equiaxed crystals, achieving remarkable grain refinement. The above experimental results are all beneficial for improving the mechanical properties of the joint, among which the thickness of the IMC layer at the interface is the key factor affecting the mechanical properties of the joint. The maximum shear tensile force (1325 N) of the joint was increased by 63.2%, and the corresponding fracture mode was changed from brittle fracture to ductile fracture. circular oscillation laser welding microstructure mechanical property Full Text 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. 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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-6987735","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":509203694,"identity":"6c34f263-595c-411f-810b-f9a7e21f9b0c","order_by":0,"name":"Tian Li","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAu0lEQVRIiWNgGAWjYBACPmYGhgMMDDYJYB4PMVrYmJlBWtJI0cLADKIOk6KFnf/ggZ87zueZSyQwPnjbxiBvTozDDvaeuV1sOSOB2XBuG4PhzgYitBzgbbuduOFGAps0bxtDgsEBYmz523YOpIX9N9FaDvO2HQDbwkysFoPDsm3JiTt7HjZLzjknYbiBkBZ+/oOPP75ts0vczp588MObMht5grbAgQEDYwOQkiBWPVjLKBgFo2AUjAIcAAB8HzxMtEJwowAAAABJRU5ErkJggg==","orcid":"","institution":"Henan Polytechnic University","correspondingAuthor":true,"prefix":"","firstName":"Tian","middleName":"","lastName":"Li","suffix":""},{"id":509203695,"identity":"f707e874-185d-49d1-9997-7afedff669cb","order_by":1,"name":"Youruiling Yan","email":"","orcid":"","institution":"Hunan University","correspondingAuthor":false,"prefix":"","firstName":"Youruiling","middleName":"","lastName":"Yan","suffix":""},{"id":509203696,"identity":"a6201080-8fda-46de-a0e1-9c58af62ca4e","order_by":2,"name":"Qiang Guo","email":"","orcid":"","institution":"Henan Polytechnic University","correspondingAuthor":false,"prefix":"","firstName":"Qiang","middleName":"","lastName":"Guo","suffix":""},{"id":509203697,"identity":"aae6a5e9-a690-4a0d-93d0-41adf64679aa","order_by":3,"name":"Dianwu Zhou","email":"","orcid":"","institution":"Hunan University","correspondingAuthor":false,"prefix":"","firstName":"Dianwu","middleName":"","lastName":"Zhou","suffix":""}],"badges":[],"createdAt":"2025-06-27 04:18:08","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6987735/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6987735/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":102295307,"identity":"63e23764-be58-469b-8e5d-df427eb9165b","added_by":"auto","created_at":"2026-02-10 10:10:49","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":2640179,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6987735/v1_covered_d92bc320-1423-4dab-9b77-18f9cf199a0c.pdf"}],"financialInterests":"","formattedTitle":"Microstructure and mechanical properties of steel/aluminum circular oscillation laser welded joint","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":"circular oscillation laser welding, microstructure, mechanical property","lastPublishedDoi":"10.21203/rs.3.rs-6987735/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6987735/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe lap welding experiments of DP590 dual phase steel and 6022 aluminum alloys were carried out by using circular oscillation laser. The mechanism of circular oscillation on the morphology, element distribution, grain size and mechanical properties of the molten pool was investigated through characterization experiments, theoretical calculations, numerical simulations and synchronous detection methods. The results showed that under the same heat input, the circular oscillation caused the heat to accumulate at the reversal point, forming an asymmetric \"double molten pool\" and increasing the bonding surface area. The metallurgical reaction between Fe and Al was suppressed by reducing the linear energy, and the layer thickness and phase composition of the interfacial intermetallic compounds (IMCs) were effectively regulated. The drag force generated by the \"mango shaped\" flow field improved the flow behavior of the molten pool, significantly enhancing the uniformity of element distribution and avoiding the formation of component segregation and solidification cracks. Based on the stirring effect of vortex, columnar crystals were broken and the temperature gradient was reduced to increase the nucleation point of equiaxed crystals, achieving remarkable grain refinement. The above experimental results are all beneficial for improving the mechanical properties of the joint, among which the thickness of the IMC layer at the interface is the key factor affecting the mechanical properties of the joint. The maximum shear tensile force (1325 N) of the joint was increased by 63.2%, and the corresponding fracture mode was changed from brittle fracture to ductile fracture.\u003c/p\u003e","manuscriptTitle":"Microstructure and mechanical properties of steel/aluminum circular oscillation laser welded joint","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-09-09 07:41:32","doi":"10.21203/rs.3.rs-6987735/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":"47f6290f-a903-430e-b12b-dce3d9464fb8","owner":[],"postedDate":"September 9th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2026-02-05T21:50:19+00:00","versionOfRecord":[],"versionCreatedAt":"2025-09-09 07:41:32","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6987735","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6987735","identity":"rs-6987735","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}