B4C particulate-reinforced Al-8.5 wt% Si-3.5 wt% Cu matrix composites: Powder metallurgical fabrication, age hardening, and characterization

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dc.authorid0000-0002-8638-3756en_US
dc.contributor.authorAkçamlı, Nazlı
dc.contributor.authorSenyurt, Berk
dc.date.accessioned2021-03-20T20:09:11Z
dc.date.available2021-03-20T20:09:11Z
dc.date.issued2021
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümüen_US
dc.description.abstractThe present work investigates microstructural and mechanical properties of B4C particulate-reinforced Al-8.5 wt % Si-3.5 wt% Cu matrix composites prepared by a successive process of mechanical alloying (MA), cold pressing, and pressureless sintering. The effects of B4C amount, milling duration, and heat treatment were investigated. The MA (for 0, 3, 5, and 7 h) in a high-energy vibratory ball mill was applied to elemental powder blends, in which 0, 5, 7.5, and 10 wt % B4C was incorporated as reinforcing particles. Mechanically alloyed (MAed) powders were uniaxially pressed and sintered for 2 h at 550 degrees C then subjected to an aging heat treatment to improve the mechanical properties. Based on XRD, SEM, and TEM microstructural investigations, compared to the as-blended case, the MAed powders possessed a semi-equiaxed morphology and homogenous structure, with higher lattice strain and smaller crystallite size. In addition, the Al-8.5 wt% Si-3.5 wt% Cu-xB(4)C (x = 0, 5, 7.5, and 10 wt%) composites consolidated from the MAed powders exhibited improved mechanical properties, including microhardness, wear resistance, and compressive strength. The hardness of the 5 h-MAed Al-8.5 wt% Si-3.5 wt% Cu-10B(4)C composite was 167 H V, and yield and compressive strength were 362 MPa and 454 MPa, respectively. This sample also exhibited one of the lowest wear rates, 5.82 x 10(-5) mm(3)/m.N, roughly 17 and 10 times lower than that of the 5 h-MAed Al-8.5 wt% Si-3.5 wt% Cu sample and its as-blended counterpart, respectively. Furthermore, the hardness and compressive strength of 5 h-MAed Al-8.5 wt% Si-3.5 wt% Cu-10B(4)C composite increased to 231 H V and 475 MPa, respectively, after the age-hardening treatment.en_US
dc.description.sponsorshipBursa Technical University Scientific Research Projects Unit [172L27]en_US
dc.description.sponsorshipThis study was financially supported by Bursa Technical University Scientific Research Projects Unit with the project number of 172L27. The authors also wish to express their appreciations to Prof. Dr. Lutfi Ovecoglu and Assoc. Prof. Dr. Duygu Agaogullari for their supports in the mechanical alloying experiments and XRD analyses.en_US
dc.identifier.doi10.1016/j.ceramint.2020.11.024en_US
dc.identifier.endpage6826en_US
dc.identifier.issn0272-8842
dc.identifier.issn1873-3956
dc.identifier.issue5en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage6813en_US
dc.identifier.urihttp://doi.org/10.1016/j.ceramint.2020.11.024
dc.identifier.urihttps://hdl.handle.net/20.500.12885/285
dc.identifier.volume47en_US
dc.identifier.wosWOS:000615086400001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorAkçamlı, Nazlı
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofCeramics Internationalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAl-Si-Cu matrix Compositesen_US
dc.subjectB4Cen_US
dc.subjectMechanical alloyingen_US
dc.subjectMechanical propertiesen_US
dc.subjectAge-hardeningen_US
dc.titleB4C particulate-reinforced Al-8.5 wt% Si-3.5 wt% Cu matrix composites: Powder metallurgical fabrication, age hardening, and characterizationen_US
dc.typeArticleen_US

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