Cyclic Oxidation Behavior of Conventional and Niobium-Modified MAR-M246 Superalloy at 900 and 1000 °C

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dc.contributor.authorde Faria Cunha, Filipe Augusto
dc.contributor.authorde Andrade Reis, Rodrigo
dc.contributor.authorGonçalves, Samantha Pinto
dc.contributor.authorFernandes, Frederico Augusto Pires
dc.contributor.authorBaldan, Renato [UNESP]
dc.contributor.authorde Sousa Malafaia, Artur Mariano
dc.contributor.institutionUniversidade Federal de Sergipe (UFS)
dc.contributor.institutionFederal Institute of Education
dc.contributor.institutionUniversidade Federal do ABC (UFABC)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T13:50:49Z
dc.date.available2023-07-29T13:50:49Z
dc.date.issued2023-03-01
dc.description.abstractNickel-based superalloys have excellent properties at high temperatures, which makes them appropriate for applications such as turbocharges and aeronautic gas turbines. MAR-M246 is a superalloy developed for these kinds of applications. The objective of this work was to study the total replacement of Ta by Nb in atomic percentage for this superalloy, regarding the oxidation resistance. Although both elements have the same role (form the γ’ precipitates) in nickel-based superalloys, Ta is more expensive than Nb. Thus, this replacement leads to the possibility of a price reduction. This work studied both conventional MAR-M246(Ta) and experimental MAR-M246(Nb) on cyclic oxidation tests at 900 and 1000 °C for up to 180 cycles. The oxide products were characterized by SEM/EDS and XRD analysis. The products of oxidation were mainly TiO2, Al2O3, Cr2O3, NiO, and Ni(Co)Cr2O4. Mass gain variation per unit area was stable for both materials and temperatures. However, spalled areas were detected for tests performed at 1000 °C. The results obtained here suggest that use of Nb instead of Ta can be considered regarding high temperature oxidation for MAR-M246 superalloy.en
dc.description.affiliationSão João del-Rei Federal University (UFSJ), Campus Santo Antônio, Praça Frei Orlando, 170, Centro, MG
dc.description.affiliationScience and Technology of Minas Gerais Federal Institute of Education, Ouro Branco, R. Afonso Sardinha, 90-Bairro Pioneiros, MG
dc.description.affiliationCenter for Engineering Modeling and Applied Social Sciences (CECS) Federal University of ABC (UFABC), Alameda da Universidade, s/n, SP
dc.description.affiliationSão Paulo State University (Unesp), Campus of Itapeva, Rua Geraldo Alckmin 519, Vila Nossa Senhora de Fátima, SP
dc.description.affiliationUnespSão Paulo State University (Unesp), Campus of Itapeva, Rua Geraldo Alckmin 519, Vila Nossa Senhora de Fátima, SP
dc.identifierhttp://dx.doi.org/10.3390/coatings13030519
dc.identifier.citationCoatings, v. 13, n. 3, 2023.
dc.identifier.doi10.3390/coatings13030519
dc.identifier.issn2079-6412
dc.identifier.scopus2-s2.0-85152472884
dc.identifier.urihttp://hdl.handle.net/11449/248686
dc.language.isoeng
dc.relation.ispartofCoatings
dc.sourceScopus
dc.subjectcyclic oxidation
dc.subjectMAR-M246
dc.subjectniobium
dc.subjectoxidation resistance
dc.subjectsuperalloys
dc.titleCyclic Oxidation Behavior of Conventional and Niobium-Modified MAR-M246 Superalloy at 900 and 1000 °Cen
dc.typeArtigo
unesp.author.orcid0000-0003-4172-3689[5]
unesp.author.orcid0000-0001-9296-9406[6]

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Artigos - Engenharia Industrial Madeireira - Itapeva