Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating

Detalhes bibliográficos
Autor(a) principal: de Freitas, Filipe Estevão
Data de Publicação: 2019
Outros Autores: Briguente, Flávio Perpétuo, Reis, Adriano Gonçalves dos [UNESP], de Vasconcelos, Getúlio, Reis, Danieli Aparecida Pereira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
DOI: 10.1016/j.surfcoat.2019.04.068
Texto Completo: http://dx.doi.org/10.1016/j.surfcoat.2019.04.068
http://hdl.handle.net/11449/187602
Resumo: Laser surface modification of the thermal barrier coating was investigated with the aim of increasing creep resistance. Yttria-stabilized-zirconia (YSZ) with a CoNiCrAlY bond coat was deposited by air plasma spraying on equiaxed Ti–6Al–4V substrates. Analysis was carried out comparing uncoated samples with as-sprayed and laser remelted ones. A cross section and detailed characterization of coating surface was carried out by scanning electron microscopy and X-ray diffraction techniques. Mechanical properties in terms of microhardness and creep resistance were evaluated. Constant load creep tests were conducted at stress levels of 125 to 319 MPa at 500 °C and 600 °C. A dense ceramic layer of thickness about 40 μm was formed by laser remelted treatment and its microhardness surface was higher than the other layers. As-sprayed YSZ had higher creep resistance than other samples. Analysis of creep behavior showed that the steady-state creep rate of laser remelted samples had about 42% reduction in 600 °C condition, evidencing a higher creep resistance than uncoated material. SEM images revealed a ductile fracture with presence of equiaxed dimples.
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spelling Investigation on the microstructure and creep behavior of laser remelted thermal barrier coatingCreepLaser remeltingThermal barrier coatingTitanium alloysLaser surface modification of the thermal barrier coating was investigated with the aim of increasing creep resistance. Yttria-stabilized-zirconia (YSZ) with a CoNiCrAlY bond coat was deposited by air plasma spraying on equiaxed Ti–6Al–4V substrates. Analysis was carried out comparing uncoated samples with as-sprayed and laser remelted ones. A cross section and detailed characterization of coating surface was carried out by scanning electron microscopy and X-ray diffraction techniques. Mechanical properties in terms of microhardness and creep resistance were evaluated. Constant load creep tests were conducted at stress levels of 125 to 319 MPa at 500 °C and 600 °C. A dense ceramic layer of thickness about 40 μm was formed by laser remelted treatment and its microhardness surface was higher than the other layers. As-sprayed YSZ had higher creep resistance than other samples. Analysis of creep behavior showed that the steady-state creep rate of laser remelted samples had about 42% reduction in 600 °C condition, evidencing a higher creep resistance than uncoated material. SEM images revealed a ductile fracture with presence of equiaxed dimples.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Federal de São Paulo ICT/UNIFESPInstituto Tecnológico de Aeronáutica ITA/DCTAUniversidade Estadual Paulista (Unesp) Instituto de Ciência e TecnologiaInstituto de Estudos Avançados Fotônica/IEAvUniversidade Estadual Paulista (Unesp) Instituto de Ciência e TecnologiaCAPES: 1636393/2016CNPq: 403070/2016-3Universidade Federal de São Paulo (UNIFESP)ITA/DCTAUniversidade Estadual Paulista (Unesp)Fotônica/IEAvde Freitas, Filipe EstevãoBriguente, Flávio PerpétuoReis, Adriano Gonçalves dos [UNESP]de Vasconcelos, GetúlioReis, Danieli Aparecida Pereira2019-10-06T15:41:32Z2019-10-06T15:41:32Z2019-07-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article257-264http://dx.doi.org/10.1016/j.surfcoat.2019.04.068Surface and Coatings Technology, v. 369, p. 257-264.0257-8972http://hdl.handle.net/11449/18760210.1016/j.surfcoat.2019.04.0682-s2.0-85064925669Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSurface and Coatings Technologyinfo:eu-repo/semantics/openAccess2021-10-23T19:02:02Zoai:repositorio.unesp.br:11449/187602Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:29:56.747810Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
title Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
spellingShingle Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
de Freitas, Filipe Estevão
Creep
Laser remelting
Thermal barrier coating
Titanium alloys
de Freitas, Filipe Estevão
Creep
Laser remelting
Thermal barrier coating
Titanium alloys
title_short Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
title_full Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
title_fullStr Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
title_full_unstemmed Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
title_sort Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
author de Freitas, Filipe Estevão
author_facet de Freitas, Filipe Estevão
de Freitas, Filipe Estevão
Briguente, Flávio Perpétuo
Reis, Adriano Gonçalves dos [UNESP]
de Vasconcelos, Getúlio
Reis, Danieli Aparecida Pereira
Briguente, Flávio Perpétuo
Reis, Adriano Gonçalves dos [UNESP]
de Vasconcelos, Getúlio
Reis, Danieli Aparecida Pereira
author_role author
author2 Briguente, Flávio Perpétuo
Reis, Adriano Gonçalves dos [UNESP]
de Vasconcelos, Getúlio
Reis, Danieli Aparecida Pereira
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Federal de São Paulo (UNIFESP)
ITA/DCTA
Universidade Estadual Paulista (Unesp)
Fotônica/IEAv
dc.contributor.author.fl_str_mv de Freitas, Filipe Estevão
Briguente, Flávio Perpétuo
Reis, Adriano Gonçalves dos [UNESP]
de Vasconcelos, Getúlio
Reis, Danieli Aparecida Pereira
dc.subject.por.fl_str_mv Creep
Laser remelting
Thermal barrier coating
Titanium alloys
topic Creep
Laser remelting
Thermal barrier coating
Titanium alloys
description Laser surface modification of the thermal barrier coating was investigated with the aim of increasing creep resistance. Yttria-stabilized-zirconia (YSZ) with a CoNiCrAlY bond coat was deposited by air plasma spraying on equiaxed Ti–6Al–4V substrates. Analysis was carried out comparing uncoated samples with as-sprayed and laser remelted ones. A cross section and detailed characterization of coating surface was carried out by scanning electron microscopy and X-ray diffraction techniques. Mechanical properties in terms of microhardness and creep resistance were evaluated. Constant load creep tests were conducted at stress levels of 125 to 319 MPa at 500 °C and 600 °C. A dense ceramic layer of thickness about 40 μm was formed by laser remelted treatment and its microhardness surface was higher than the other layers. As-sprayed YSZ had higher creep resistance than other samples. Analysis of creep behavior showed that the steady-state creep rate of laser remelted samples had about 42% reduction in 600 °C condition, evidencing a higher creep resistance than uncoated material. SEM images revealed a ductile fracture with presence of equiaxed dimples.
publishDate 2019
dc.date.none.fl_str_mv 2019-10-06T15:41:32Z
2019-10-06T15:41:32Z
2019-07-15
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/10.1016/j.surfcoat.2019.04.068
Surface and Coatings Technology, v. 369, p. 257-264.
0257-8972
http://hdl.handle.net/11449/187602
10.1016/j.surfcoat.2019.04.068
2-s2.0-85064925669
url http://dx.doi.org/10.1016/j.surfcoat.2019.04.068
http://hdl.handle.net/11449/187602
identifier_str_mv Surface and Coatings Technology, v. 369, p. 257-264.
0257-8972
10.1016/j.surfcoat.2019.04.068
2-s2.0-85064925669
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Surface and Coatings Technology
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 257-264
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
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dc.identifier.doi.none.fl_str_mv 10.1016/j.surfcoat.2019.04.068