Improving precision in aluminum alloy machining due to the application of diamond-like carbon thin film

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dc.contributor.authorDe Melo Silva, William [UNESP]
dc.contributor.authorMartins, Paulo Sérgio
dc.contributor.authorDe Carvalho, Vagner Eustáquio
dc.contributor.authorDa Cruz, Nilson Cristino [UNESP]
dc.contributor.authorClaudino, Enzo [UNESP]
dc.contributor.authorCarneiro, José Rubens Gonçalves
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionFiat Chrysler Group
dc.contributor.institutionUniversidade Federal de Minas Gerais (UFMG)
dc.contributor.institutionPontifical Catholic University of Minas Gerais
dc.date.accessioned2021-06-25T10:32:06Z
dc.date.available2021-06-25T10:32:06Z
dc.date.issued2021-07-01
dc.description.abstractCutting precision is extremely affected by a phenomenon known as built up edge (BUE) that occurs on tungsten carbide tools during low cutting speed of aluminum alloy. BUE is responsible for early tool breakage due to excessive material build up from the machined part on the cutting face, leading to problems of shape irregularity and tool-tip breakage. Thus, diamond-like carbon (DLC) was deposited and tested to verify cutting precision in aluminum alloy by using tungsten carbide tools. The characterizations of the film were morphology analysis through scanning electron microscopy (SEM), structural atomic analyze of chemical bond from Raman backscatter spectroscopy, the distribution of carbon atoms on the film surface by X-ray photoelectron spectroscopy (XPS), and the evaluation of Young's modulus and hardness using the Oliver-Pharr method. To analyze the cutting precision, drilling tests were performed on coated/uncoated drills at two cutting speeds (340 and 430 m/min). As an evaluation parameter in the aluminum alloy, the hole diameter deviation was measured after pre determined numbers of drilling operations. Statistical comparisons between the diameter deviation as a function of the number of drilling test indicated better cutting accuracy for the DLC-coated tool. The factors identified in this work, such as the reduction of the friction coefficient, and the hardness and Young's modulus of the DLC helped in the performance of the tool, mainly in the lower cutting speed.en
dc.description.affiliationMaterial Science and Engineering Laboratory São Paulo State University IBTEC-UNESP, Al. Tecomarias s/n
dc.description.affiliationFiat Chrysler Group, Av. Contorno, 3455
dc.description.affiliationDepartment of Physics Federal University of Minas Gerais, Av. Presidente Antônio Carlos 6627
dc.description.affiliationLaboratory of Technological Plasmas Institute of Science and Technology São Paulo State University, Av. Três de Março 511
dc.description.affiliationDepartment of Mechanical Engineering Pontifical Catholic University of Minas Gerais, Av. Dom JoséGaspar 500
dc.description.affiliationUnespMaterial Science and Engineering Laboratory São Paulo State University IBTEC-UNESP, Al. Tecomarias s/n
dc.description.affiliationUnespLaboratory of Technological Plasmas Institute of Science and Technology São Paulo State University, Av. Três de Março 511
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2015/20438-6
dc.identifierhttp://dx.doi.org/10.1115/1.4048723
dc.identifier.citationJournal of Tribology, v. 143, n. 7, 2021.
dc.identifier.doi10.1115/1.4048723
dc.identifier.issn1528-8897
dc.identifier.issn0742-4787
dc.identifier.scopus2-s2.0-85107333847
dc.identifier.urihttp://hdl.handle.net/11449/206442
dc.language.isoeng
dc.relation.ispartofJournal of Tribology
dc.sourceScopus
dc.subjectAlloy
dc.subjectAluminum
dc.subjectBuilt up edge
dc.subjectCarbide
dc.subjectDiamond-like carbon
dc.subjectMachining
dc.subjectTungsten
dc.titleImproving precision in aluminum alloy machining due to the application of diamond-like carbon thin filmen
dc.typeArtigo

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