Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing filler
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/68373 |
Resumo: | The joining of alumina (Al<sub>2</sub>O<sub>3</sub>) to γ-TiAl and Ti6Al4V alloys, using Ag-Cu sputter-coated Ti brazing filler foil, was investigated. Brazing experiments were performed at 980 °C for 30 min in vacuum. The microstructure and chemical composition of the brazed interfaces were analyzed by scanning electron microscopy and by energy dispersive X-ray spectroscopy, respectively. A microstructural characterization of joints revealed that sound multilayered interfaces were produced using this novel brazing filler. Both interfaces are composed mainly of α-Ti, along with Ti<sub>2</sub>(Ag,Cu) and TiAg intermetallics. In the case of the brazing of γ-TiAl alloys, α<sub>2</sub>-Ti<sub>3</sub>Al and γ-TiAl intermetallics are also detected at the interface. Bonding to Al<sub>2</sub>O<sub>3</sub> is promoted by the formation of a quite hard Ti-rich layer, which may reach a hardness up to 1872 HV 0.01 and is possibly composed of a mixture of α-Ti and Ti oxides. Hardness distribution maps indicate that no segregation of either soft or brittle phases occurs at the central regions of the interfaces or near the base Ti alloys. In addition, a smooth hardness transition was established between the interface of Al<sub>2</sub>O<sub>3</sub> to either γ-TiAl or Ti6Al4V alloys. |
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Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing fillerAluminaBrazingInterfaceMicrohardnessMicrostructureTi6Al4Vγ-TiAl alloyγ-TiAl alloyEngenharia e Tecnologia::Engenharia dos MateriaisScience & TechnologyThe joining of alumina (Al<sub>2</sub>O<sub>3</sub>) to γ-TiAl and Ti6Al4V alloys, using Ag-Cu sputter-coated Ti brazing filler foil, was investigated. Brazing experiments were performed at 980 °C for 30 min in vacuum. The microstructure and chemical composition of the brazed interfaces were analyzed by scanning electron microscopy and by energy dispersive X-ray spectroscopy, respectively. A microstructural characterization of joints revealed that sound multilayered interfaces were produced using this novel brazing filler. Both interfaces are composed mainly of α-Ti, along with Ti<sub>2</sub>(Ag,Cu) and TiAg intermetallics. In the case of the brazing of γ-TiAl alloys, α<sub>2</sub>-Ti<sub>3</sub>Al and γ-TiAl intermetallics are also detected at the interface. Bonding to Al<sub>2</sub>O<sub>3</sub> is promoted by the formation of a quite hard Ti-rich layer, which may reach a hardness up to 1872 HV 0.01 and is possibly composed of a mixture of α-Ti and Ti oxides. Hardness distribution maps indicate that no segregation of either soft or brittle phases occurs at the central regions of the interfaces or near the base Ti alloys. In addition, a smooth hardness transition was established between the interface of Al<sub>2</sub>O<sub>3</sub> to either γ-TiAl or Ti6Al4V alloys.This work was financially supported by: Project PTDC/CTM-CTM/31579/2017—POCI-01-0145-FEDER031579- funded by FEDER funds through COMPETE2020—Programa Operacional Competitividade e Internacionalização (POCI) and by national funds (PIDDAC) through FCT/MCTES.Multidisciplinary Digital Publishing InstituteUniversidade do MinhoEmadinia, OmidGuedes, A.Tavares, C. J.Simões, Sónia20202020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/68373eng10.3390/ma13214802https://www.mdpi.com/1996-1944/13/21/4802info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:49:51Zoai:repositorium.sdum.uminho.pt:1822/68373Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:48:25.905355Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing filler |
title |
Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing filler |
spellingShingle |
Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing filler Emadinia, Omid Alumina Brazing Interface Microhardness Microstructure Ti6Al4V γ-TiAl alloy γ -TiAl alloy Engenharia e Tecnologia::Engenharia dos Materiais Science & Technology |
title_short |
Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing filler |
title_full |
Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing filler |
title_fullStr |
Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing filler |
title_full_unstemmed |
Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing filler |
title_sort |
Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing filler |
author |
Emadinia, Omid |
author_facet |
Emadinia, Omid Guedes, A. Tavares, C. J. Simões, Sónia |
author_role |
author |
author2 |
Guedes, A. Tavares, C. J. Simões, Sónia |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Emadinia, Omid Guedes, A. Tavares, C. J. Simões, Sónia |
dc.subject.por.fl_str_mv |
Alumina Brazing Interface Microhardness Microstructure Ti6Al4V γ-TiAl alloy γ -TiAl alloy Engenharia e Tecnologia::Engenharia dos Materiais Science & Technology |
topic |
Alumina Brazing Interface Microhardness Microstructure Ti6Al4V γ-TiAl alloy γ -TiAl alloy Engenharia e Tecnologia::Engenharia dos Materiais Science & Technology |
description |
The joining of alumina (Al<sub>2</sub>O<sub>3</sub>) to γ-TiAl and Ti6Al4V alloys, using Ag-Cu sputter-coated Ti brazing filler foil, was investigated. Brazing experiments were performed at 980 °C for 30 min in vacuum. The microstructure and chemical composition of the brazed interfaces were analyzed by scanning electron microscopy and by energy dispersive X-ray spectroscopy, respectively. A microstructural characterization of joints revealed that sound multilayered interfaces were produced using this novel brazing filler. Both interfaces are composed mainly of α-Ti, along with Ti<sub>2</sub>(Ag,Cu) and TiAg intermetallics. In the case of the brazing of γ-TiAl alloys, α<sub>2</sub>-Ti<sub>3</sub>Al and γ-TiAl intermetallics are also detected at the interface. Bonding to Al<sub>2</sub>O<sub>3</sub> is promoted by the formation of a quite hard Ti-rich layer, which may reach a hardness up to 1872 HV 0.01 and is possibly composed of a mixture of α-Ti and Ti oxides. Hardness distribution maps indicate that no segregation of either soft or brittle phases occurs at the central regions of the interfaces or near the base Ti alloys. In addition, a smooth hardness transition was established between the interface of Al<sub>2</sub>O<sub>3</sub> to either γ-TiAl or Ti6Al4V alloys. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020 2020-01-01T00:00:00Z |
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://hdl.handle.net/1822/68373 |
url |
http://hdl.handle.net/1822/68373 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.3390/ma13214802 https://www.mdpi.com/1996-1944/13/21/4802 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute |
publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799133061703532544 |