Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing filler

Detalhes bibliográficos
Autor(a) principal: Emadinia, Omid
Data de Publicação: 2020
Outros Autores: Guedes, A., Tavares, C. J., Simões, Sónia
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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spelling Joining alumina to titanium alloys using Ag-Cu sputter-coated Ti brazing fillerAluminaBrazingInterfaceMicrohardnessMicrostructureTi6Al4Vγ-TiAl alloy&#947-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
&#947
-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
&#947
-TiAl alloy
Engenharia e Tecnologia::Engenharia dos Materiais
Science & Technology
topic Alumina
Brazing
Interface
Microhardness
Microstructure
Ti6Al4V
γ-TiAl alloy
&#947
-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
instname_str 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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