Study on weldability of similar aluminium alloys by friction spot welding

Detalhes bibliográficos
Autor(a) principal: Oliveira, António José Faria de
Data de Publicação: 2016
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/38919
Resumo: Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.
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spelling Study on weldability of similar aluminium alloys by friction spot weldingStudy on weldability of similar aluminium alloys by friction spot weldingFriction Spot WeldingSolid State WeldingSolid State JoiningAluminium AlloysHelmholtz-Zentrum GeesthachtDissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.The objective of the present work is to access the weldability of a similar configuration of AA5454-H22 by Friction Spot Welding, test the strength of the weld in different configurations and analyse the parameters that contribute to the behaviour of the joint under different types of loading. The welds were produced in Lap-Shear and Cross-Tensile configuration for static loading experiments and Fatigue samples were also produced to characterize the performance under cyclic loading. Regarding the structural changes introduced by the process, the microstructure was thoroughly examined, the hardness and grain size of each zone were measured and finally the fracture surfaces were observed. The thermal cycle was studied to quantify the variation of temperature with time in the plates. The weldability study and the use of a Box-Behnken Design of Experiments led to an optimum parameter and the statistical analysis allowed the conclusion that Plunge Depth is the most prominent parameter in the process for this particular material. The most effective welds of the initial range are, generally, the combinations with slower Feeding Rate, higher Rotational Speed and a Plunging Depth of about 20% in the lower plate. Those combinations translate into a high heat input. Defects such as hook, inadequate bonding and insufficient refill were found in different parameters. The morphology of the hook such as the Bending Angle and the Hook Height proved to have a definite effect on the strength of the welds and on the fracture mode, respectively. According to the data gathered in fracture analysis, the bonding of the plates is stronger in the area directly affected by the sleeve and then gradually decreases towards the centre of the weld, where the bonding is considerably weaker.2016-02-26info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://hdl.handle.net/10316/38919http://hdl.handle.net/10316/38919TID:201663970engOliveira, António José Faria deinfo: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:RCAAP2022-01-12T21:41:16Zoai:estudogeral.uc.pt:10316/38919Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:08.191638Repositório 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 Study on weldability of similar aluminium alloys by friction spot welding
Study on weldability of similar aluminium alloys by friction spot welding
title Study on weldability of similar aluminium alloys by friction spot welding
spellingShingle Study on weldability of similar aluminium alloys by friction spot welding
Oliveira, António José Faria de
Friction Spot Welding
Solid State Welding
Solid State Joining
Aluminium Alloys
Helmholtz-Zentrum Geesthacht
title_short Study on weldability of similar aluminium alloys by friction spot welding
title_full Study on weldability of similar aluminium alloys by friction spot welding
title_fullStr Study on weldability of similar aluminium alloys by friction spot welding
title_full_unstemmed Study on weldability of similar aluminium alloys by friction spot welding
title_sort Study on weldability of similar aluminium alloys by friction spot welding
author Oliveira, António José Faria de
author_facet Oliveira, António José Faria de
author_role author
dc.contributor.author.fl_str_mv Oliveira, António José Faria de
dc.subject.por.fl_str_mv Friction Spot Welding
Solid State Welding
Solid State Joining
Aluminium Alloys
Helmholtz-Zentrum Geesthacht
topic Friction Spot Welding
Solid State Welding
Solid State Joining
Aluminium Alloys
Helmholtz-Zentrum Geesthacht
description Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.
publishDate 2016
dc.date.none.fl_str_mv 2016-02-26
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/10316/38919
http://hdl.handle.net/10316/38919
TID:201663970
url http://hdl.handle.net/10316/38919
identifier_str_mv TID:201663970
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.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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