Isothermal short-term oxidation behavior of MAR-M246 nickel-based superalloy at 800°C and 1000°C
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1002/maco.202112931 http://hdl.handle.net/11449/230469 |
Resumo: | Superalloys are widely employed at high temperatures for structural applications. Hence, knowledge about the oxidation of these materials is essential. However, the literature is scanty when it comes to some families of superalloys. The purpose of this study was therefore to analyze the MAR-M246 polycrystalline alloy in isothermal short-term tests at 800°C and 1000°C for up to 240 h. Thermodynamic simulations were performed to evaluate the material's phase stability as a function of temperature and to assess the expected phases in response to oxygen pressure. The oxidized samples were characterized by SEM-EDS and DRX, which revealed a tendency for scaling of oxidized material, particularly at temperatures of 1000°C. Nevertheless, protective layers of Cr2O3 and Al2O3 oxides were formed, which enabled the formation of fairly thin oxide layers, in addition to NiO and complex oxides. The region of the metallic substrate close to the oxide layer underwent aluminum depletion, causing the gamma-prime phase to disappear, as well as formation of aluminum oxides and titanium nitrides. Last, a good correlation was found between the thermodynamic simulations and the oxides that were formed. |
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Isothermal short-term oxidation behavior of MAR-M246 nickel-based superalloy at 800°C and 1000°Chigh temperature materialsisothermal oxidationMAR-M246microstructuresuperalloysSuperalloys are widely employed at high temperatures for structural applications. Hence, knowledge about the oxidation of these materials is essential. However, the literature is scanty when it comes to some families of superalloys. The purpose of this study was therefore to analyze the MAR-M246 polycrystalline alloy in isothermal short-term tests at 800°C and 1000°C for up to 240 h. Thermodynamic simulations were performed to evaluate the material's phase stability as a function of temperature and to assess the expected phases in response to oxygen pressure. The oxidized samples were characterized by SEM-EDS and DRX, which revealed a tendency for scaling of oxidized material, particularly at temperatures of 1000°C. Nevertheless, protective layers of Cr2O3 and Al2O3 oxides were formed, which enabled the formation of fairly thin oxide layers, in addition to NiO and complex oxides. The region of the metallic substrate close to the oxide layer underwent aluminum depletion, causing the gamma-prime phase to disappear, as well as formation of aluminum oxides and titanium nitrides. Last, a good correlation was found between the thermodynamic simulations and the oxides that were formed.São Paulo State University (UNESP) Campus of ItapevaUniversité Grenoble Alpes SIMaPCentre de Recherches d'Ugitech Ugitech Av. Paul GirodInstituto de Ciência e Tecnologia Universidade Federal de AlfenasDepartment of Metallurgy Federal Center for Technological Education Celso Suckow da Fonseca (CEFET-RJ) R. do Areal 522 - Parque PerequêDepartment of Mechanical and Industrial Engineering São João Del Rei Federal University (UFSJ), Minas GeraisSão Paulo State University (UNESP) Campus of ItapevaUniversidade Estadual Paulista (UNESP)SIMaPAv. Paul GirodUniversidade Federal de Alfenas522 - Parque PerequêUniversidade Federal de Sergipe (UFS)Baldan, Renato [UNESP]Latu-Romain, LaurenceWouters, YvesChaia, NabilAlkmin, Luciano B.de Sousa Malafaia, Artur M.2022-04-29T08:40:07Z2022-04-29T08:40:07Z2022-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1002/maco.202112931Materials and Corrosion.1521-41760947-5117http://hdl.handle.net/11449/23046910.1002/maco.2021129312-s2.0-85125398000Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials and Corrosioninfo:eu-repo/semantics/openAccess2022-04-29T08:40:07Zoai:repositorio.unesp.br:11449/230469Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-29T08:40:07Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Isothermal short-term oxidation behavior of MAR-M246 nickel-based superalloy at 800°C and 1000°C |
title |
Isothermal short-term oxidation behavior of MAR-M246 nickel-based superalloy at 800°C and 1000°C |
spellingShingle |
Isothermal short-term oxidation behavior of MAR-M246 nickel-based superalloy at 800°C and 1000°C Baldan, Renato [UNESP] high temperature materials isothermal oxidation MAR-M246 microstructure superalloys |
title_short |
Isothermal short-term oxidation behavior of MAR-M246 nickel-based superalloy at 800°C and 1000°C |
title_full |
Isothermal short-term oxidation behavior of MAR-M246 nickel-based superalloy at 800°C and 1000°C |
title_fullStr |
Isothermal short-term oxidation behavior of MAR-M246 nickel-based superalloy at 800°C and 1000°C |
title_full_unstemmed |
Isothermal short-term oxidation behavior of MAR-M246 nickel-based superalloy at 800°C and 1000°C |
title_sort |
Isothermal short-term oxidation behavior of MAR-M246 nickel-based superalloy at 800°C and 1000°C |
author |
Baldan, Renato [UNESP] |
author_facet |
Baldan, Renato [UNESP] Latu-Romain, Laurence Wouters, Yves Chaia, Nabil Alkmin, Luciano B. de Sousa Malafaia, Artur M. |
author_role |
author |
author2 |
Latu-Romain, Laurence Wouters, Yves Chaia, Nabil Alkmin, Luciano B. de Sousa Malafaia, Artur M. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) SIMaP Av. Paul Girod Universidade Federal de Alfenas 522 - Parque Perequê Universidade Federal de Sergipe (UFS) |
dc.contributor.author.fl_str_mv |
Baldan, Renato [UNESP] Latu-Romain, Laurence Wouters, Yves Chaia, Nabil Alkmin, Luciano B. de Sousa Malafaia, Artur M. |
dc.subject.por.fl_str_mv |
high temperature materials isothermal oxidation MAR-M246 microstructure superalloys |
topic |
high temperature materials isothermal oxidation MAR-M246 microstructure superalloys |
description |
Superalloys are widely employed at high temperatures for structural applications. Hence, knowledge about the oxidation of these materials is essential. However, the literature is scanty when it comes to some families of superalloys. The purpose of this study was therefore to analyze the MAR-M246 polycrystalline alloy in isothermal short-term tests at 800°C and 1000°C for up to 240 h. Thermodynamic simulations were performed to evaluate the material's phase stability as a function of temperature and to assess the expected phases in response to oxygen pressure. The oxidized samples were characterized by SEM-EDS and DRX, which revealed a tendency for scaling of oxidized material, particularly at temperatures of 1000°C. Nevertheless, protective layers of Cr2O3 and Al2O3 oxides were formed, which enabled the formation of fairly thin oxide layers, in addition to NiO and complex oxides. The region of the metallic substrate close to the oxide layer underwent aluminum depletion, causing the gamma-prime phase to disappear, as well as formation of aluminum oxides and titanium nitrides. Last, a good correlation was found between the thermodynamic simulations and the oxides that were formed. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-04-29T08:40:07Z 2022-04-29T08:40:07Z 2022-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1002/maco.202112931 Materials and Corrosion. 1521-4176 0947-5117 http://hdl.handle.net/11449/230469 10.1002/maco.202112931 2-s2.0-85125398000 |
url |
http://dx.doi.org/10.1002/maco.202112931 http://hdl.handle.net/11449/230469 |
identifier_str_mv |
Materials and Corrosion. 1521-4176 0947-5117 10.1002/maco.202112931 2-s2.0-85125398000 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials and Corrosion |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803649904425304064 |