Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento
Autor(a) principal: | |
---|---|
Data de Publicação: | 2015 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/7808 |
Resumo: | The aircraft industry search for light weight materials to produce lower density parts for increased energy efficiency of fuels was focused in recent years in searching new alloy systems with high mechanical strength and with the ability of producing low-density coatings. The objective of this work was to select a promising system for manufacturing alloys with high mechanical strenght but also capable of forming high hardness samples, for different compositions. The chosen system was mapped in a matter of microstructures formed under different cooling rates, thereby determining the formation region of each phase depending on the cooling rate required for their production. The Al-rich compositions in Al-Mn-Ce system were chosen and their solidification was studied under various cooling rates, from high to low. For high cooling rates, the formation of the crystalline phase Al20Mn2Ce was observed, this is a metastable phase that forms in these Al-rich samples under high cooling rates. The results presented here allow a reinterpretation of the literature data about the phases present in other studies, it is clear that in all cases, the phase present is Al20Mn2Ce, this phase may even coexist with a quasicrystalline phase, the binary Al-Mn quasicrystal, however there is no beneficial effect by adding Ce to the formation of quasicrystals. This phase can also form in copper mold cast samples, in this work produced in the form of cylinders with different diameters, whose yield strength can exceed 800MPa. This phase is relatively thermal stable due to a layer of the Al6Mn phase formed on decomposition of the ternary phase that constitutes a protective cover. Solidification of samples produced under lower cooling rates were also studied. This part of the study enabled the development of a new fraction of the phase diagram of this system. |
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Coury, Francisco GilKiminami, Claudio Shyintihttp://lattes.cnpq.br/5443002033733395http://lattes.cnpq.br/8609825406277730b5a4dd72-40bc-4b09-829c-7b719640f9c22016-10-11T14:16:57Z2016-10-11T14:16:57Z2015-07-07COURY, Francisco Gil. Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento. 2015. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2015. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7808.https://repositorio.ufscar.br/handle/ufscar/7808The aircraft industry search for light weight materials to produce lower density parts for increased energy efficiency of fuels was focused in recent years in searching new alloy systems with high mechanical strength and with the ability of producing low-density coatings. The objective of this work was to select a promising system for manufacturing alloys with high mechanical strenght but also capable of forming high hardness samples, for different compositions. The chosen system was mapped in a matter of microstructures formed under different cooling rates, thereby determining the formation region of each phase depending on the cooling rate required for their production. The Al-rich compositions in Al-Mn-Ce system were chosen and their solidification was studied under various cooling rates, from high to low. For high cooling rates, the formation of the crystalline phase Al20Mn2Ce was observed, this is a metastable phase that forms in these Al-rich samples under high cooling rates. The results presented here allow a reinterpretation of the literature data about the phases present in other studies, it is clear that in all cases, the phase present is Al20Mn2Ce, this phase may even coexist with a quasicrystalline phase, the binary Al-Mn quasicrystal, however there is no beneficial effect by adding Ce to the formation of quasicrystals. This phase can also form in copper mold cast samples, in this work produced in the form of cylinders with different diameters, whose yield strength can exceed 800MPa. This phase is relatively thermal stable due to a layer of the Al6Mn phase formed on decomposition of the ternary phase that constitutes a protective cover. Solidification of samples produced under lower cooling rates were also studied. This part of the study enabled the development of a new fraction of the phase diagram of this system.Nos últimos anos, a demanda da indústria aeronáutica por peças de menor densidade, com o objetivo de aumentar a eficiência energética de combustíveis, se focou na busca de novos sistemas de ligas com alta resistência mecânica e com a capacidade de produzir recobrimentos de baixa densidade. O objetivo deste trabalho foi selecionar um sistema promissor para a fabricação de peças de alta resistência mecânica, capaz de formar amostras de alta dureza, para diferentes composições. O sistema escolhido foi mapeado de acordo com as microestruturas formadas para diferentes taxas de resfriamento, determinando, desta forma, a região de formação de cada fase presente neste sistema em função da taxa de resfriamento necessária para a sua produção. As composições ricas em Al do sistema Al-Mn-Ce foram escolhidas e sua solidificação foi estudada sob diversas taxas de resfriamento, englobrando tanto altas taxas quanto baixas. Para altas taxas de resfriamento, observou-se a formação da fase cristalina Al20Mn2Ce, uma fase metaestável que se forma em composições ricas em Al para altas taxas de resfriamento. Os resultados aqui apresentados possibilitam uma reinterpretação dos dados presentes na literatura sobre as fases presentes nos outros trabalhos. Em todos os casos, é possível perceber que a fase presente é a Al20Mn2Ce, que pode até coexistir com uma fase quasicristalina, a binária Al-Mn. Entretanto, não há efeitos benéficos ao se adicionar Ce para a formação de quasicristais. Esta se mantém presente em amostras solidificadas na forma de cilindros maciços, cujo limite de escoamento pode exceder 800MPa. Esta fase é relativamente estável termicamente por conta de uma camada da fase Al6Mn que se forma na sua decomposição na forma de uma capa protetora. A solidificação sobre baixas taxas de resfriamento também foi estudada. Esta parte do estudo possibilitou a elaboração de uma nova fração do diagrama de fases deste sistema.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)porUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarAlumínioMicroscopia eletrônicaQuasicristaisENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::METALURGIA DE TRANSFORMACAOMecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamentoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisOnline6006002105c73f-4677-47de-b45e-1c88b51bf001info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDissFGC.pdfDissFGC.pdfapplication/pdf13101829https://repositorio.ufscar.br/bitstream/ufscar/7808/1/DissFGC.pdfd22d882649fb3d1c83e504e4bdb1de2eMD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81957https://repositorio.ufscar.br/bitstream/ufscar/7808/2/license.txtae0398b6f8b235e40ad82cba6c50031dMD52TEXTDissFGC.pdf.txtDissFGC.pdf.txtExtracted texttext/plain310016https://repositorio.ufscar.br/bitstream/ufscar/7808/3/DissFGC.pdf.txt4d059d2dd23ec1bd2a74cfb183fef34bMD53THUMBNAILDissFGC.pdf.jpgDissFGC.pdf.jpgIM Thumbnailimage/jpeg6023https://repositorio.ufscar.br/bitstream/ufscar/7808/4/DissFGC.pdf.jpg26544afa79a50dbab28c4b12a31c9838MD54ufscar/78082023-09-18 18:30:59.455oai:repositorio.ufscar.br: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Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:30:59Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento |
title |
Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento |
spellingShingle |
Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento Coury, Francisco Gil Alumínio Microscopia eletrônica Quasicristais ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::METALURGIA DE TRANSFORMACAO |
title_short |
Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento |
title_full |
Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento |
title_fullStr |
Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento |
title_full_unstemmed |
Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento |
title_sort |
Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento |
author |
Coury, Francisco Gil |
author_facet |
Coury, Francisco Gil |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/8609825406277730 |
dc.contributor.author.fl_str_mv |
Coury, Francisco Gil |
dc.contributor.advisor1.fl_str_mv |
Kiminami, Claudio Shyinti |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/5443002033733395 |
dc.contributor.authorID.fl_str_mv |
b5a4dd72-40bc-4b09-829c-7b719640f9c2 |
contributor_str_mv |
Kiminami, Claudio Shyinti |
dc.subject.por.fl_str_mv |
Alumínio Microscopia eletrônica Quasicristais |
topic |
Alumínio Microscopia eletrônica Quasicristais ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::METALURGIA DE TRANSFORMACAO |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::METALURGIA DE TRANSFORMACAO |
description |
The aircraft industry search for light weight materials to produce lower density parts for increased energy efficiency of fuels was focused in recent years in searching new alloy systems with high mechanical strength and with the ability of producing low-density coatings. The objective of this work was to select a promising system for manufacturing alloys with high mechanical strenght but also capable of forming high hardness samples, for different compositions. The chosen system was mapped in a matter of microstructures formed under different cooling rates, thereby determining the formation region of each phase depending on the cooling rate required for their production. The Al-rich compositions in Al-Mn-Ce system were chosen and their solidification was studied under various cooling rates, from high to low. For high cooling rates, the formation of the crystalline phase Al20Mn2Ce was observed, this is a metastable phase that forms in these Al-rich samples under high cooling rates. The results presented here allow a reinterpretation of the literature data about the phases present in other studies, it is clear that in all cases, the phase present is Al20Mn2Ce, this phase may even coexist with a quasicrystalline phase, the binary Al-Mn quasicrystal, however there is no beneficial effect by adding Ce to the formation of quasicrystals. This phase can also form in copper mold cast samples, in this work produced in the form of cylinders with different diameters, whose yield strength can exceed 800MPa. This phase is relatively thermal stable due to a layer of the Al6Mn phase formed on decomposition of the ternary phase that constitutes a protective cover. Solidification of samples produced under lower cooling rates were also studied. This part of the study enabled the development of a new fraction of the phase diagram of this system. |
publishDate |
2015 |
dc.date.issued.fl_str_mv |
2015-07-07 |
dc.date.accessioned.fl_str_mv |
2016-10-11T14:16:57Z |
dc.date.available.fl_str_mv |
2016-10-11T14:16:57Z |
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.citation.fl_str_mv |
COURY, Francisco Gil. Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento. 2015. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2015. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7808. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/7808 |
identifier_str_mv |
COURY, Francisco Gil. Mecanismo de solidificação de ligas do sistema Al-Mn-Ce ricas em Al sob diferentes taxas de resfriamento. 2015. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2015. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7808. |
url |
https://repositorio.ufscar.br/handle/ufscar/7808 |
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por |
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por |
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600 600 |
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info:eu-repo/semantics/openAccess |
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openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus São Carlos |
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Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM |
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UFSCar |
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Universidade Federal de São Carlos Câmpus São Carlos |
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