Investigation of Al 2 O 3 /PKSA Influence on Mechanical and Tribological Performance of Al7075 Hybrid Composites

Investigation of Al 2 O 3 /PKSA Influence on Mechanical and Tribological Performance of Al7075 Hybrid Composites | 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 Investigation of Al 2 O 3 /PKSA Influence on Mechanical and Tribological Performance of Al7075 Hybrid Composites A. Seshappa, B. Chandrasekar Rao, Devunuri Suresh, S Satish Goud, and 5 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9512792/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 Al-7075 is a metal matrix material with a high strength-to-weight ratio, making it suitable for modern aviation applications. However, it is not ideal for high-temperature applications such as turbo systems. To enhance its properties, high-strength reinforcements like Al₂O₃ are added. These reinforcements improve wear resistance and thermal properties of the composites, but they also increase the overall weight. Therefore, there is a need to explore lightweight additives such as palm kernel shell ash (PKSA), which can enhance wear resistance without increasing weight or adversely affecting other mechanical properties. In this study, Al7075/Al₂O₃/PKSA hybrid composite specimens were successfully fabricated with 100 g of Al₂O₃, 0.04, 0.08 also 0.12 kgs of PKSA particles and tested for their physical and tribological properties to evaluate the effect of different additives in hybrid metal matrix composites (HMMCs). The results indicate that the addition of heavier reinforcements like Al₂O₃ increases the density of the composite by approximately 3.56% compared to the base material. A composite containing 12 wt.% Al₂O₃ and 8 wt.% PKSA exhibited the lowest specific wear rate of 145.12 mm³/Nm under conditions of higher density and lower sliding speed. The corresponding coefficient of friction was found to be 0.159. Finally, wear maps were developed to explain the wear behavior and underlying mechanisms of the HMMCs during pin-on-disc testing. PKSA Al2O3 Stir Casting AMMCs Wear Test Full Text Additional Declarations No competing interests reported. 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. 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-9512792","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":631671091,"identity":"b4128830-c0d7-40e9-b0cc-cf94d3cadf4b","order_by":0,"name":"A. 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However, it is not ideal for high-temperature applications such as turbo systems. To enhance its properties, high-strength reinforcements like Al₂O₃ are added. These reinforcements improve wear resistance and thermal properties of the composites, but they also increase the overall weight. Therefore, there is a need to explore lightweight additives such as palm kernel shell ash (PKSA), which can enhance wear resistance without increasing weight or adversely affecting other mechanical properties. In this study, Al7075/Al₂O₃/PKSA hybrid composite specimens were successfully fabricated with 100 g of Al₂O₃, 0.04, 0.08 also 0.12 kgs of PKSA particles and tested for their physical and tribological properties to evaluate the effect of different additives in hybrid metal matrix composites (HMMCs). The results indicate that the addition of heavier reinforcements like Al₂O₃ increases the density of the composite by approximately 3.56% compared to the base material. A composite containing 12 wt.% Al₂O₃ and 8 wt.% PKSA exhibited the lowest specific wear rate of 145.12 mm\u0026sup3;/Nm under conditions of higher density and lower sliding speed. The corresponding coefficient of friction was found to be 0.159. Finally, wear maps were developed to explain the wear behavior and underlying mechanisms of the HMMCs during pin-on-disc testing.\u003c/p\u003e","manuscriptTitle":"Investigation of Al 2 O 3 /PKSA Influence on Mechanical and Tribological Performance of Al7075 Hybrid Composites","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-04-30 12:18:24","doi":"10.21203/rs.3.rs-9512792/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":"245b5901-1ad1-4525-9a86-586fe1afb2b0","owner":[],"postedDate":"April 30th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2026-04-30T12:18:24+00:00","versionOfRecord":[],"versionCreatedAt":"2026-04-30 12:18:24","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-9512792","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-9512792","identity":"rs-9512792","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}