Desgaste abrasivo de revestimentos cralsin multicamada/gradiente
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFU |
Texto Completo: | https://repositorio.ufu.br/handle/123456789/14969 https://doi.org/10.14393/ufu.di.2014.473 |
Resumo: | PVD coatings have been used to improve the wear resistance of severe contacts in different tribological systems. Related works showed advantages in mechanical properties of multilayered and graded films due to their resistance to crack growth and better adhesion. During stamping, sliding between sheet metal and forming tool damages their surfaces. Maintenance of stamping tools involves polishing the tool edge, or, in case of severe damage, replacement of the tool. Hard coatings have been used on stamping tools in order to minimize these costly and time consuming operations. Sliding wear tests of CrAlSiN coatings applied by PVD onto tool steel have evidenced the occurrence of abrasive mechanisms on the worn surfaces, apparently caused by wear debris. In this work, the abrasion wear resistance of these coatings was investigated. The effect of substrate surface finish, coating architecture, coating composition and thickness was analyzed. Two different coating designs were used: multilayered and gradient coatings. In all the samples, the initial composition at the interface with the substrate was kept constant and the surface composition (CrN/AlSi ratio) was varied. The toughness of the coating was investigated by progressive load scratch tests. Free-ball microabrasion tests were carried out using SiC and SiO2. The wear resistance presented direct correlation to the product of the critical load and surface hardness. The wear rates of the multilayered coatings were higher than those of the gradient coatings. In microabrasion tests with SiC showed that coatings with higher concentration of AlSi near the surface presented the lowest wear rates. The gradient coatings had higher hardness and toughness than multilayer coating. When using SiO2 as abrasive particle the kc values showed indifferent to all coatings. |
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Desgaste abrasivo de revestimentos cralsin multicamada/gradienteAbrasion wear of multilayered/gradient cralsin coatingsMicroabrasãoPVDCrAlSiNRevestimento multicamadaRevestimento gradienteDesgaste mecânicoRevestimentosMicroabrasion testGradient coatingMultilayer coatingCNPQ::ENGENHARIAS::ENGENHARIA MECANICAPVD coatings have been used to improve the wear resistance of severe contacts in different tribological systems. Related works showed advantages in mechanical properties of multilayered and graded films due to their resistance to crack growth and better adhesion. During stamping, sliding between sheet metal and forming tool damages their surfaces. Maintenance of stamping tools involves polishing the tool edge, or, in case of severe damage, replacement of the tool. Hard coatings have been used on stamping tools in order to minimize these costly and time consuming operations. Sliding wear tests of CrAlSiN coatings applied by PVD onto tool steel have evidenced the occurrence of abrasive mechanisms on the worn surfaces, apparently caused by wear debris. In this work, the abrasion wear resistance of these coatings was investigated. The effect of substrate surface finish, coating architecture, coating composition and thickness was analyzed. Two different coating designs were used: multilayered and gradient coatings. In all the samples, the initial composition at the interface with the substrate was kept constant and the surface composition (CrN/AlSi ratio) was varied. The toughness of the coating was investigated by progressive load scratch tests. Free-ball microabrasion tests were carried out using SiC and SiO2. The wear resistance presented direct correlation to the product of the critical load and surface hardness. The wear rates of the multilayered coatings were higher than those of the gradient coatings. In microabrasion tests with SiC showed that coatings with higher concentration of AlSi near the surface presented the lowest wear rates. The gradient coatings had higher hardness and toughness than multilayer coating. When using SiO2 as abrasive particle the kc values showed indifferent to all coatings.Fundação de Amparo a Pesquisa do Estado de Minas GeraisMestre em Engenharia MecânicaRevestimentos depositados pela técnica PVD têm sido utilizados para melhorar a resistência ao desgaste de contatos severos em diferentes sistemas tribológicos. Diversos trabalhos mostraram avanços nas propriedades mecânicas ao utilizar revestimentos multicamada e gradiente, devido a sua maior resistência ao crescimento de trincas e melhor aderência. Durante a estampagem, ocorre o desgaste na superfície da ferramenta devido ao deslizamento entre a ferramenta e a peça. A manutenção das ferramentas de estampagem envolve o polimento da mesma, ou, no caso de desgaste muito severo, sua substituição. Revestimentos duros têm sido utilizados em ferramentas de estampagem para minimizar os custos e tempo de operação. Em testes de desgaste por deslizamento em revestimentos CrAlSiN depositados por PVD em aço ferramenta, evidenciaram mecanismos de desgaste abrasivo na superfície desgastada, aparentemente causados por partículas duras geradas durante esse desgaste. Nesse trabalho, a resistência ao desgaste abrasivo desses revestimentos foi investigada. O efeito do acabamento superficial do substrato, da arquitetura do revestimento, da composição química e da espessura foram analisados. Dois projetos de revestimento foram utilizados: revestimento em multicamadas e em gradiente de composição química. Em todas as amostras, a composição química inicial, na interface com o substrato, foi mantida constante e a composição química (razão entre CrN/AlSi) variou até sua superfície. A tenacidade do revestimento foi estudada utilizando esclerometria com carga progressiva. Foram utilizados testes de microabrasão com partículas abrasivas de SiC e SiO2. A resistência à abrasão mostrou uma correlação direta com o produto da carga crítica e dureza. Às taxas de desgaste do revestimento multicamada foram maiores que as do revestimento gradiente. Em testes de abrasão com SiC o revestimento com maior teor de AlSi na superfície apresentou menor coeficiente de desgaste. Ao utilizar SiO2 como partícula abrasiva, os resultados de kc se mostraram indiferente para todos os revestimentos.Universidade Federal de UberlândiaBRPrograma de Pós-graduação em Engenharia MecânicaEngenhariasUFUSilva Junior, Washington Martins dahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4769549P2Mello, José Daniel Biasoli dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783817J1Souza, Roberto Martins dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4797207A7Teles, Vinícius Carvalho2016-06-22T18:40:50Z2015-02-102016-06-22T18:40:50Z2014-09-03info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfTELES, Vinícius Carvalho. Abrasion wear of multilayered/gradient cralsin coatings. 2014. 103 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2014. DOI https://doi.org/10.14393/ufu.di.2014.473https://repositorio.ufu.br/handle/123456789/14969https://doi.org/10.14393/ufu.di.2014.473porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFUinstname:Universidade Federal de Uberlândia (UFU)instacron:UFU2021-10-01T19:07:06Zoai:repositorio.ufu.br:123456789/14969Repositório InstitucionalONGhttp://repositorio.ufu.br/oai/requestdiinf@dirbi.ufu.bropendoar:2021-10-01T19:07:06Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU)false |
dc.title.none.fl_str_mv |
Desgaste abrasivo de revestimentos cralsin multicamada/gradiente Abrasion wear of multilayered/gradient cralsin coatings |
title |
Desgaste abrasivo de revestimentos cralsin multicamada/gradiente |
spellingShingle |
Desgaste abrasivo de revestimentos cralsin multicamada/gradiente Teles, Vinícius Carvalho Microabrasão PVD CrAlSiN Revestimento multicamada Revestimento gradiente Desgaste mecânico Revestimentos Microabrasion test Gradient coating Multilayer coating CNPQ::ENGENHARIAS::ENGENHARIA MECANICA |
title_short |
Desgaste abrasivo de revestimentos cralsin multicamada/gradiente |
title_full |
Desgaste abrasivo de revestimentos cralsin multicamada/gradiente |
title_fullStr |
Desgaste abrasivo de revestimentos cralsin multicamada/gradiente |
title_full_unstemmed |
Desgaste abrasivo de revestimentos cralsin multicamada/gradiente |
title_sort |
Desgaste abrasivo de revestimentos cralsin multicamada/gradiente |
author |
Teles, Vinícius Carvalho |
author_facet |
Teles, Vinícius Carvalho |
author_role |
author |
dc.contributor.none.fl_str_mv |
Silva Junior, Washington Martins da http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4769549P2 Mello, José Daniel Biasoli de http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783817J1 Souza, Roberto Martins de http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4797207A7 |
dc.contributor.author.fl_str_mv |
Teles, Vinícius Carvalho |
dc.subject.por.fl_str_mv |
Microabrasão PVD CrAlSiN Revestimento multicamada Revestimento gradiente Desgaste mecânico Revestimentos Microabrasion test Gradient coating Multilayer coating CNPQ::ENGENHARIAS::ENGENHARIA MECANICA |
topic |
Microabrasão PVD CrAlSiN Revestimento multicamada Revestimento gradiente Desgaste mecânico Revestimentos Microabrasion test Gradient coating Multilayer coating CNPQ::ENGENHARIAS::ENGENHARIA MECANICA |
description |
PVD coatings have been used to improve the wear resistance of severe contacts in different tribological systems. Related works showed advantages in mechanical properties of multilayered and graded films due to their resistance to crack growth and better adhesion. During stamping, sliding between sheet metal and forming tool damages their surfaces. Maintenance of stamping tools involves polishing the tool edge, or, in case of severe damage, replacement of the tool. Hard coatings have been used on stamping tools in order to minimize these costly and time consuming operations. Sliding wear tests of CrAlSiN coatings applied by PVD onto tool steel have evidenced the occurrence of abrasive mechanisms on the worn surfaces, apparently caused by wear debris. In this work, the abrasion wear resistance of these coatings was investigated. The effect of substrate surface finish, coating architecture, coating composition and thickness was analyzed. Two different coating designs were used: multilayered and gradient coatings. In all the samples, the initial composition at the interface with the substrate was kept constant and the surface composition (CrN/AlSi ratio) was varied. The toughness of the coating was investigated by progressive load scratch tests. Free-ball microabrasion tests were carried out using SiC and SiO2. The wear resistance presented direct correlation to the product of the critical load and surface hardness. The wear rates of the multilayered coatings were higher than those of the gradient coatings. In microabrasion tests with SiC showed that coatings with higher concentration of AlSi near the surface presented the lowest wear rates. The gradient coatings had higher hardness and toughness than multilayer coating. When using SiO2 as abrasive particle the kc values showed indifferent to all coatings. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-09-03 2015-02-10 2016-06-22T18:40:50Z 2016-06-22T18:40:50Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
TELES, Vinícius Carvalho. Abrasion wear of multilayered/gradient cralsin coatings. 2014. 103 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2014. DOI https://doi.org/10.14393/ufu.di.2014.473 https://repositorio.ufu.br/handle/123456789/14969 https://doi.org/10.14393/ufu.di.2014.473 |
identifier_str_mv |
TELES, Vinícius Carvalho. Abrasion wear of multilayered/gradient cralsin coatings. 2014. 103 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2014. DOI https://doi.org/10.14393/ufu.di.2014.473 |
url |
https://repositorio.ufu.br/handle/123456789/14969 https://doi.org/10.14393/ufu.di.2014.473 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Uberlândia BR Programa de Pós-graduação em Engenharia Mecânica Engenharias UFU |
publisher.none.fl_str_mv |
Universidade Federal de Uberlândia BR Programa de Pós-graduação em Engenharia Mecânica Engenharias UFU |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFU instname:Universidade Federal de Uberlândia (UFU) instacron:UFU |
instname_str |
Universidade Federal de Uberlândia (UFU) |
instacron_str |
UFU |
institution |
UFU |
reponame_str |
Repositório Institucional da UFU |
collection |
Repositório Institucional da UFU |
repository.name.fl_str_mv |
Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU) |
repository.mail.fl_str_mv |
diinf@dirbi.ufu.br |
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1805569709612990464 |