Laser Cladding Refurbishment of Directionally Solidified MAR-M-002 Turbine Blades with Inconel 625 Powder

Laser Cladding Refurbishment of Directionally Solidified MAR-M-002 Turbine Blades with Inconel 625 Powder | 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 Laser Cladding Refurbishment of Directionally Solidified MAR-M-002 Turbine Blades with Inconel 625 Powder Ali Khorram, Ali Nasiri, Vahid Dibaji This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7883425/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 study, IN625 powder was deposited on directionally solidified (DS) Mar-M-002 superalloy using a fiber laser cladding technique. The effects of laser parameters, namely laser power, scanning speed, and duty cycle were investigated on coating defects, microstructural evolution, dilution ratio, molten pool geometry, and microhardness. The results showed that increasing the heat input to 92.08 J/mm induced solidification cracking in the clad zone, whereas reducing it to 25.03 J/mm produced unmelted powder particle defects. An increase in scanning speed from 4.5 to 8.5 mm/s raised the thermal gradient (G) at the interface and transformed the solidification morphology from cellular dendritic to planar. Similarly, reducing the laser power from 400 to 325 W and lowering the duty cycle from 85% to 70% increased the G/R ratio and promoted a transition from cellular to planar at the interface. Furthermore, increasing the scanning speed, decreasing the laser power, and reducing the duty cycle resulted in a decrease in dilution ratio, clad width, clad height, and clad depth. The highest hardness, 388 HV, was recorded in the base metal due to γ′ precipitates. Increasing the scanning speed enhanced hardness in both the interface and clad regions, while lowering laser power and duty cycle produced a similar hardening effect. Laser cladding DS MAR-M-002 IN625 filler metal Microstructure Microhardness Full Text Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 03 Nov, 2025 Reviewers invited by journal 03 Nov, 2025 Editor invited by journal 24 Oct, 2025 Editor assigned by journal 21 Oct, 2025 First submitted to journal 20 Oct, 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-7883425","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":539013401,"identity":"638687d0-2c41-4caf-919f-00c9877b7fd8","order_by":0,"name":"Ali 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Powder","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":true,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"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 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The effects of laser parameters, namely laser power, scanning speed, and duty cycle were investigated on coating defects, microstructural evolution, dilution ratio, molten pool geometry, and microhardness. The results showed that increasing the heat input to 92.08 J/mm induced solidification cracking in the clad zone, whereas reducing it to 25.03 J/mm produced unmelted powder particle defects. An increase in scanning speed from 4.5 to 8.5 mm/s raised the thermal gradient (G) at the interface and transformed the solidification morphology from cellular dendritic to planar. Similarly, reducing the laser power from 400 to 325 W and lowering the duty cycle from 85% to 70% increased the G/R ratio and promoted a transition from cellular to planar at the interface. Furthermore, increasing the scanning speed, decreasing the laser power, and reducing the duty cycle resulted in a decrease in dilution ratio, clad width, clad height, and clad depth. The highest hardness, 388 HV, was recorded in the base metal due to γ\u0026prime; precipitates. Increasing the scanning speed enhanced hardness in both the interface and clad regions, while lowering laser power and duty cycle produced a similar hardening effect.\u003c/p\u003e","manuscriptTitle":"Laser Cladding Refurbishment of Directionally Solidified MAR-M-002 Turbine Blades with Inconel 625 Powder","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-11-12 22:06:22","doi":"10.21203/rs.3.rs-7883425/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"reviewerAgreed","content":"","date":"2025-11-03T19:05:14+00:00","index":0,"fulltext":""},{"type":"reviewersInvited","content":"","date":"2025-11-03T08:13:47+00:00","index":"","fulltext":""},{"type":"editorInvited","content":"Welding in the World","date":"2025-10-24T06:10:05+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2025-10-21T04:14:27+00:00","index":"","fulltext":""},{"type":"submitted","content":"Welding in the World","date":"2025-10-20T11:23:53+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":"21419fd0-cf0d-45fd-8d01-ea2b4639818e","owner":[],"postedDate":"November 12th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[],"tags":[],"updatedAt":"2026-05-19T16:02:54+00:00","versionOfRecord":[],"versionCreatedAt":"2025-11-12 22:06:22","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7883425","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7883425","identity":"rs-7883425","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}