Plasma nitriding of AA2011 alloy and surface characterization by NDT techniques
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10362/16443 |
Resumo: | Al-Cu alloys are widely used in the aerospace and automotive industries due to their high specific strength in some tempered conditions. However, due to poor corrosion and wear resistance, they are often anodized and/or painted. Plasma nitriding has been proposed as an alternative, though the developments in this technique are still in a recent stage for Al alloys. Electrical characterization techniques are well implemented NDTs in the industry because of good accuracy associated with lower cost, compared to other methods. Some, like eddy currents and 4-point probe techniques, are often used in coating inspection. The objective of this study was to perform Al nitriding at low temperatures to minimize the tempering initial condition damage and to assess the feasibility of eddy currents technique as a method for evaluating surface properties. The work developed can be divided in two stages. The first one was the process tuning, done at the Shibaura Institute of Technology, in Tokyo; and the second was the electrical characterization done in Faculdade de Ciências e Tecnologia, UNL. Low temperature nitriding of AA2011 alloy specimens was successfully achieved. Electrical conductivity results show that lift-off measurements by eddy currents testing can be related to surface properties. |
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Plasma nitriding of AA2011 alloy and surface characterization by NDT techniquesAluminum nitridingElectrical characterizationNon destructive testingEddy currentsDomínio/Área Científica::Engenharia e Tecnologia::Engenharia MecânicaAl-Cu alloys are widely used in the aerospace and automotive industries due to their high specific strength in some tempered conditions. However, due to poor corrosion and wear resistance, they are often anodized and/or painted. Plasma nitriding has been proposed as an alternative, though the developments in this technique are still in a recent stage for Al alloys. Electrical characterization techniques are well implemented NDTs in the industry because of good accuracy associated with lower cost, compared to other methods. Some, like eddy currents and 4-point probe techniques, are often used in coating inspection. The objective of this study was to perform Al nitriding at low temperatures to minimize the tempering initial condition damage and to assess the feasibility of eddy currents technique as a method for evaluating surface properties. The work developed can be divided in two stages. The first one was the process tuning, done at the Shibaura Institute of Technology, in Tokyo; and the second was the electrical characterization done in Faculdade de Ciências e Tecnologia, UNL. Low temperature nitriding of AA2011 alloy specimens was successfully achieved. Electrical conductivity results show that lift-off measurements by eddy currents testing can be related to surface properties.Santos, TelmoMiranda, RosaAizawa, TatsuhikoRUNRodrigues, Diogo Farias Gonçalves Alexandre2016-02-12T10:31:11Z2015-092016-022015-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/16443enginfo: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:RCAAP2024-03-11T03:53:24Zoai:run.unl.pt:10362/16443Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:23:15.332693Repositório 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 |
Plasma nitriding of AA2011 alloy and surface characterization by NDT techniques |
title |
Plasma nitriding of AA2011 alloy and surface characterization by NDT techniques |
spellingShingle |
Plasma nitriding of AA2011 alloy and surface characterization by NDT techniques Rodrigues, Diogo Farias Gonçalves Alexandre Aluminum nitriding Electrical characterization Non destructive testing Eddy currents Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Mecânica |
title_short |
Plasma nitriding of AA2011 alloy and surface characterization by NDT techniques |
title_full |
Plasma nitriding of AA2011 alloy and surface characterization by NDT techniques |
title_fullStr |
Plasma nitriding of AA2011 alloy and surface characterization by NDT techniques |
title_full_unstemmed |
Plasma nitriding of AA2011 alloy and surface characterization by NDT techniques |
title_sort |
Plasma nitriding of AA2011 alloy and surface characterization by NDT techniques |
author |
Rodrigues, Diogo Farias Gonçalves Alexandre |
author_facet |
Rodrigues, Diogo Farias Gonçalves Alexandre |
author_role |
author |
dc.contributor.none.fl_str_mv |
Santos, Telmo Miranda, Rosa Aizawa, Tatsuhiko RUN |
dc.contributor.author.fl_str_mv |
Rodrigues, Diogo Farias Gonçalves Alexandre |
dc.subject.por.fl_str_mv |
Aluminum nitriding Electrical characterization Non destructive testing Eddy currents Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Mecânica |
topic |
Aluminum nitriding Electrical characterization Non destructive testing Eddy currents Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Mecânica |
description |
Al-Cu alloys are widely used in the aerospace and automotive industries due to their high specific strength in some tempered conditions. However, due to poor corrosion and wear resistance, they are often anodized and/or painted. Plasma nitriding has been proposed as an alternative, though the developments in this technique are still in a recent stage for Al alloys. Electrical characterization techniques are well implemented NDTs in the industry because of good accuracy associated with lower cost, compared to other methods. Some, like eddy currents and 4-point probe techniques, are often used in coating inspection. The objective of this study was to perform Al nitriding at low temperatures to minimize the tempering initial condition damage and to assess the feasibility of eddy currents technique as a method for evaluating surface properties. The work developed can be divided in two stages. The first one was the process tuning, done at the Shibaura Institute of Technology, in Tokyo; and the second was the electrical characterization done in Faculdade de Ciências e Tecnologia, UNL. Low temperature nitriding of AA2011 alloy specimens was successfully achieved. Electrical conductivity results show that lift-off measurements by eddy currents testing can be related to surface properties. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-09 2015-09-01T00:00:00Z 2016-02-12T10:31:11Z 2016-02 |
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 |
http://hdl.handle.net/10362/16443 |
url |
http://hdl.handle.net/10362/16443 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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.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 |
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1799137869902643200 |