Microstructure Evolution and Failure Modes of a Resistance Spot Welded TWIP Steel

Detalhes bibliográficos
Autor(a) principal: Colombo,Tiago
Data de Publicação: 2018
Outros Autores: Santos,Guilherme dos, Teruel,Pedro, Otubo,Jorge, Faria,Alfredo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista soldagem & inspeção (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242018000400460
Resumo: Abstract This study discusses the microstructure, quasi-static mechanical strength and failure modes of TWIP steel weld spots. Weld spots were produced by varying the main resistance spot welding parameters: welding current, welding time and electrode compression force. All the samples showed a remarkable material hardness mismatch between the fusion zone, the heat affected zone and the base material, as evidenced by microindentation maps. Hardness at the fusion zone is lower than that of heat-affected zone and base metal, which facilitates interfacial failure mode during tensile-shear tests. However, high heat inputs promoted the failure mode changes to partial interfacial mode and then to pullout mode during tensile-shear tests as confirmed by Scanning Electron Micrographs. These changes in failure mode were accompanied by a notable increase in tensile-shear strength and energy absorption capability.
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spelling Microstructure Evolution and Failure Modes of a Resistance Spot Welded TWIP SteelTWIP steelFailure modesHAZ hardeningTensile-shear strengthAbstract This study discusses the microstructure, quasi-static mechanical strength and failure modes of TWIP steel weld spots. Weld spots were produced by varying the main resistance spot welding parameters: welding current, welding time and electrode compression force. All the samples showed a remarkable material hardness mismatch between the fusion zone, the heat affected zone and the base material, as evidenced by microindentation maps. Hardness at the fusion zone is lower than that of heat-affected zone and base metal, which facilitates interfacial failure mode during tensile-shear tests. However, high heat inputs promoted the failure mode changes to partial interfacial mode and then to pullout mode during tensile-shear tests as confirmed by Scanning Electron Micrographs. These changes in failure mode were accompanied by a notable increase in tensile-shear strength and energy absorption capability.Associação Brasileira de Soldagem2018-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242018000400460Soldagem & Inspeção v.23 n.4 2018reponame:Revista soldagem & inspeção (Online)instname:Associação Brasileira de Soldagem (ABS)instacron:ABS10.1590/0104-9224/si2304.02info:eu-repo/semantics/openAccessColombo,TiagoSantos,Guilherme dosTeruel,PedroOtubo,JorgeFaria,Alfredoeng2019-03-15T00:00:00Zoai:scielo:S0104-92242018000400460Revistahttp://abs-soldagem.org.br/s&i/https://old.scielo.br/oai/scielo-oai.php||revista-si@abs-soldagem.org.br0104-92241980-6973opendoar:2019-03-15T00:00Revista soldagem & inspeção (Online) - Associação Brasileira de Soldagem (ABS)false
dc.title.none.fl_str_mv Microstructure Evolution and Failure Modes of a Resistance Spot Welded TWIP Steel
title Microstructure Evolution and Failure Modes of a Resistance Spot Welded TWIP Steel
spellingShingle Microstructure Evolution and Failure Modes of a Resistance Spot Welded TWIP Steel
Colombo,Tiago
TWIP steel
Failure modes
HAZ hardening
Tensile-shear strength
title_short Microstructure Evolution and Failure Modes of a Resistance Spot Welded TWIP Steel
title_full Microstructure Evolution and Failure Modes of a Resistance Spot Welded TWIP Steel
title_fullStr Microstructure Evolution and Failure Modes of a Resistance Spot Welded TWIP Steel
title_full_unstemmed Microstructure Evolution and Failure Modes of a Resistance Spot Welded TWIP Steel
title_sort Microstructure Evolution and Failure Modes of a Resistance Spot Welded TWIP Steel
author Colombo,Tiago
author_facet Colombo,Tiago
Santos,Guilherme dos
Teruel,Pedro
Otubo,Jorge
Faria,Alfredo
author_role author
author2 Santos,Guilherme dos
Teruel,Pedro
Otubo,Jorge
Faria,Alfredo
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Colombo,Tiago
Santos,Guilherme dos
Teruel,Pedro
Otubo,Jorge
Faria,Alfredo
dc.subject.por.fl_str_mv TWIP steel
Failure modes
HAZ hardening
Tensile-shear strength
topic TWIP steel
Failure modes
HAZ hardening
Tensile-shear strength
description Abstract This study discusses the microstructure, quasi-static mechanical strength and failure modes of TWIP steel weld spots. Weld spots were produced by varying the main resistance spot welding parameters: welding current, welding time and electrode compression force. All the samples showed a remarkable material hardness mismatch between the fusion zone, the heat affected zone and the base material, as evidenced by microindentation maps. Hardness at the fusion zone is lower than that of heat-affected zone and base metal, which facilitates interfacial failure mode during tensile-shear tests. However, high heat inputs promoted the failure mode changes to partial interfacial mode and then to pullout mode during tensile-shear tests as confirmed by Scanning Electron Micrographs. These changes in failure mode were accompanied by a notable increase in tensile-shear strength and energy absorption capability.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242018000400460
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242018000400460
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0104-9224/si2304.02
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Soldagem
publisher.none.fl_str_mv Associação Brasileira de Soldagem
dc.source.none.fl_str_mv Soldagem & Inspeção v.23 n.4 2018
reponame:Revista soldagem & inspeção (Online)
instname:Associação Brasileira de Soldagem (ABS)
instacron:ABS
instname_str Associação Brasileira de Soldagem (ABS)
instacron_str ABS
institution ABS
reponame_str Revista soldagem & inspeção (Online)
collection Revista soldagem & inspeção (Online)
repository.name.fl_str_mv Revista soldagem & inspeção (Online) - Associação Brasileira de Soldagem (ABS)
repository.mail.fl_str_mv ||revista-si@abs-soldagem.org.br
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