Investigation on the microstructure and creep behavior of laser remelted thermal barrier coating
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
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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Repositório Institucional da UNESP |
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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 |
|
_version_ |
1822182399636668416 |
dc.identifier.doi.none.fl_str_mv |
10.1016/j.surfcoat.2019.04.068 |