Scratch and wear behaviour of Co-Cr-Mo alloy in ringer’s lactate solution

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dc.contributor.authorSilva, Raimundo
dc.contributor.authorSantos, Marcos Dantas dos
dc.contributor.authorMadureira, Rui
dc.contributor.authorSoares, Rui
dc.contributor.authorNeto, Rui
dc.contributor.authorVieira, Angela Aparecida
dc.contributor.authorGonçalves, Polyana Alves Radi
dc.contributor.authorLeite, Priscila Maria Sarmeiro M.
dc.contributor.authorVieira, Lúcia
dc.contributor.authorViana, Filomena
dc.date.accessioned2025-02-10T17:32:09Z
dc.date.available2025-02-10T17:32:09Z
dc.date.issued22023
dc.description.abstractCobalt–chromium–molybdenum (Co-Cr-Mo) alloy is a material recommended for biomedical implants; however, to be suitable for this application, it should have good tribological properties, which are related to grain size. This paper investigates the tribological behaviour of a Co-Cr-Mo alloy produced using investment casting, together with electromagnetic stirring, to reduce its grain size. The samples were subjected to wear and scratch tests in simulated body fluid (Ringer’s lactate solution). Since a reduction in grain size can influence the behaviour of the material, in terms of resistance and tribological response, four samples with different grain sizes were produced for use in our investigation of the behaviour of the alloy, in which we considered the friction coefficient, wear, and scratch resistance. The experiments were performed using a tribometer, with mean values for the friction coefficient, normal load, and tangential force acquired and recorded by the software. Spheres of Ti-6Al-4V and 316L steel were used as counterface materials. In addition, to elucidate the influence of grain size on the mechanical properties of the alloy, observations were conducted via scanning electron microscopy (SEM) with electron backscatter diffraction (EBSD). The results showed changes in the structure, with a reduction in grain size from 5.51 to 0.79 mm. Using both spheres, the best results for the friction coefficient and wear volume corresponded to the sample with the smallest grain size of 0.79 mm. The friction coefficients obtained were 0.37 and 0.45, using the Ti-6Al-4V and 316L spheres, respectively. These results confirm that the best surface finish for Co-Cr-Mo alloy used as a biomedical implant is one with a smaller grain size, since this results in a lower friction coefficient and low wear.
dc.description.physical23 p.
dc.format.mimetypePDF
dc.identifier.affiliationUniversity of the State of Amazonas
dc.identifier.affiliationUniversidade do Porto
dc.identifier.affiliationInstitute of Science and Innovation in Mechanical and Industrial Engineering
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.bibliographicCitationSILVA, Raimundo et al. Scratch and Wear Behaviour of Co-Cr-Mo Alloy in Ringer’s Lactate Solution. Materials, v. 16, n. 7, p. 1-23, 2023. Disponível em: https://www.mdpi.com/1996-1944/16/7/2923.
dc.identifier.doi10.3390/ma16072923
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/562
dc.language.isoen_US
dc.publisherMDPI
dc.rights.holderRaimundo Silva
dc.rights.holderLúcia Vieira
dc.subject.keywordCobalt–chromium–molybdenum alloy
dc.subject.keywordHip replacements
dc.subject.keywordOrthopaedics
dc.subject.keywordScratch test
dc.titleScratch and wear behaviour of Co-Cr-Mo alloy in ringer’s lactate solution
dc.typeArtigos de Periódicos

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