Microstructure and mechanical properties of Al-10at% Sc/6061Al dissimilar diffusion welding

Microstructure and mechanical properties of Al-10at% Sc/6061Al dissimilar diffusion 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 Microstructure and mechanical properties of Al-10at% Sc/6061Al dissimilar diffusion welding lu zhang, Daogao Wu, Xiaowei Zhang, Hongbo Yang, Zhiqiang Wang, and 6 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6446490/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 The fundamental physical properties of Al-10at%Sc alloy were tested experimentally, the residual stress distribution in the diffusion welding process were simulated, and the diffusion welding experiments of Al-10at%Sc target has been conducted. The research results indicated that, for Al-10at%Sc alloy, average coefficient of thermal expansion is 28.8×10⁻⁶/℃(25 ~ 520°C), average thermal conductivity is 158W/(m·K)(25 ~ 600°C), Young’s modulus decreases from 91 GPa at 25°C to 71 GPa at 600°C, density is 2.68 g/cm³ and specific heat capacity is 1.07 J/(g·K); an interlayer is not needed in diffusion welding of Al-10at%Sc alloy and 6061 Al alloy backing plate due to the maximum residual stress of 19.62 MPa at the interface significantly lower than the 50% yield strength of both materials; in the hot isostatic pressing diffusion welding process, a high-strength weld joint can be achieved when the surface roughness is below 0.8 µm, the welding temperature is between 450–500°C, the welding pressure is around 125 MPa, and the holding time is 4–5 hours; Mg atoms from the 6061 Al alloy are enriched around the Al₃Sc phase in the Al-10at%Sc alloy, a stable Mg-Al solid solutions at the weld joint is formed, and there is no noticeable diffusion of Sc into the 6061 Al alloy. Al-10at%Sc alloy target numerical simulation residual stress diffusion welding welding strength Full Text Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 25 Aug, 2025 Reviewers invited by journal 25 Aug, 2025 Editor invited by journal 07 Jun, 2025 Editor assigned by journal 06 Jun, 2025 First submitted to journal 03 Jun, 2025 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-6446490","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":505387061,"identity":"03de92cb-ac6c-4517-97c9-a4cb8ddd4e24","order_by":0,"name":"lu 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The research results indicated that, for Al-10at%Sc alloy, average coefficient of thermal expansion is 28.8\u0026times;10⁻⁶/℃(25\u0026thinsp;~\u0026thinsp;520\u0026deg;C), average thermal conductivity is 158W/(m\u0026middot;K)(25\u0026thinsp;~\u0026thinsp;600\u0026deg;C), Young\u0026rsquo;s modulus decreases from 91 GPa at 25\u0026deg;C to 71 GPa at 600\u0026deg;C, density is 2.68 g/cm\u0026sup3; and specific heat capacity is 1.07 J/(g\u0026middot;K); an interlayer is not needed in diffusion welding of Al-10at%Sc alloy and 6061 Al alloy backing plate due to the maximum residual stress of 19.62 MPa at the interface significantly lower than the 50% yield strength of both materials; in the hot isostatic pressing diffusion welding process, a high-strength weld joint can be achieved when the surface roughness is below 0.8 \u0026micro;m, the welding temperature is between 450\u0026ndash;500\u0026deg;C, the welding pressure is around 125 MPa, and the holding time is 4\u0026ndash;5 hours; Mg atoms from the 6061 Al alloy are enriched around the Al₃Sc phase in the Al-10at%Sc alloy, a stable Mg-Al solid solutions at the weld joint is formed, and there is no noticeable diffusion of Sc into the 6061 Al alloy.\u003c/p\u003e","manuscriptTitle":"Microstructure and mechanical properties of Al-10at% Sc/6061Al dissimilar diffusion welding","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-09-02 10:55:54","doi":"10.21203/rs.3.rs-6446490/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"reviewerAgreed","content":"","date":"2025-08-25T20:21:28+00:00","index":0,"fulltext":""},{"type":"reviewersInvited","content":"","date":"2025-08-25T16:44:38+00:00","index":"","fulltext":""},{"type":"editorInvited","content":"Welding in the World","date":"2025-06-07T18:06:45+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2025-06-06T05:56:35+00:00","index":"","fulltext":""},{"type":"submitted","content":"Welding in the World","date":"2025-06-03T14:19:47+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"welding-in-the-world","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"witw","sideBox":"Learn more about [Welding in the World](https://www.springer.com/journal/40194)","snPcode":"40194","submissionUrl":"https://www.editorialmanager.com/witw/","title":"Welding in the World","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"c5721f0c-2def-4160-94cf-d45ca12c714a","owner":[],"postedDate":"September 2nd, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[],"tags":[],"updatedAt":"2025-10-11T01:16:46+00:00","versionOfRecord":[],"versionCreatedAt":"2025-09-02 10:55:54","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6446490","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6446490","identity":"rs-6446490","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}