Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates

Barbetta, Luiz Delagnelo

Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates

Detalhes bibliográficos
Autor(a) principal:	Barbetta, Luiz Delagnelo
Data de Publicação:	2014
Tipo de documento:	Dissertação
Idioma:	por
Título da fonte:	Repositório Institucional da UFSC
Texto Completo:	https://repositorio.ufsc.br/xmlui/handle/123456789/180922
Resumo:	Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2014.

Metadados do item

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network_acronym_str	UFSC
network_name_str	Repositório Institucional da UFSC
repository_id_str	2373
spelling	Barbetta, Luiz DelagneloWeingaertner, Walter LindolfoKaierle, Stefan2017-11-14T15:48:05Z2017-11-14T15:48:05Z2014332922https://repositorio.ufsc.br/xmlui/handle/123456789/180922Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2014.Para melhor compreender a formação de falhas de solidificação e de porosidade na soldagem híbrida laser - GMAW de chapas de aço com grande espessura, foram feitos ensaios com variação de diâmetro do feixe laser, de potência do feixe laser, de metal de adição, de velocidade de soldagem e com oscilação transversal do feixe laser. Esses ensaios foram realizados utilizando-se uma fonte de laser de disco com 16 kW de potência máxima e duas tochas GMAW em chapas de aço alta resistência e baixa liga que atende ao grau de qualidade X70 da API 5L e depois foram avaliados através de imagens metalográficas e de raios-X. Acredita-se que a geometria do cordão de solda tem grande influência na formação de falhas de solidificação e esse trabalho investigou a relação que há entre uma protuberância no cordão de solda e a falha de solidificação, sugerindo ainda uma forma de medir a severidade dessa protuberância: o ângulo de alargamento da protuberância. Foi verificado também como os parâmetros supracitados influenciam o ângulo de alargamento da protuberância e a formação das falhas de solidificação. Duas novas explicações para a discrepância de resultados encontrados na literatura quanto à formação da falha de solidificação foram propostas. Por fim, analisou-se a porosidade encontrada nos cordões de solda através das imagens metalográficas e de raios-X para determinar as suas principais causas na soldagem híbrida laser - GMA de chapas grossas de aço API 5L X70.Abstract : To achieve a better understanding of the solidification flaw and porosity formation in hybrid laser - GMA welding of thick steel plates, tests were carried with varying laser beam width, laser beam power, filler metal, welding speed and with transverse beam oscillation. Those tests were carried using a 16 kW maximal power disk laser source and two GMAW torches on high strength low alloy steel plates that complies with the grade X70 from API 5L that were later analyzed through metallographic and X-ray imaging. It is believed that the weld seam geometry has a high influence on the solidification flaw formation and it was investigated in this work the relation between a bulge in the weld seam and the solidification flaw, introducing a new way to measure the severity of the bulge: the bulge widening angle. It was also verified how the aforementioned parameters influence the bulge widening angle and the solidification flaw formation. Two new explanations for the discrepancy found in the literature regarding the formation of the solidification flaws were proposed. Lastly, the porosity found in the weld seams was analyzed through the metallographic and X-ray images to determine its main causes in the hybrid laser - GMA welding of thick API 5L X70 steel plates.Engenharia mecânicaSoldagemLasersSolidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel platesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisporreponame:Repositório Institucional da UFSCinstname:Universidade Federal de Santa Catarina (UFSC)instacron:UFSCinfo:eu-repo/semantics/openAccessORIGINALPEMC1582-D.pdfPEMC1582-D.pdfDissertaçãoapplication/pdf3410507https://repositorio.ufsc.br/bitstream/123456789/180922/1/PEMC1582-D.pdfd7467bb6147cb8c861cdab971f3cc6a9MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81383https://repositorio.ufsc.br/bitstream/123456789/180922/2/license.txt11ee89cd31d893362820eab7c4d46734MD52123456789/1809222017-11-14 13:49:22.948oai:repositorio.ufsc.br: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ório de PublicaçõesPUBhttp://150.162.242.35/oai/requestopendoar:23732017-11-14T15:49:22Repositório Institucional da UFSC - Universidade Federal de Santa Catarina (UFSC)false
dc.title.pt_BR.fl_str_mv	Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates
title	Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates
spellingShingle	Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates Barbetta, Luiz Delagnelo Engenharia mecânica Soldagem Lasers
title_short	Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates
title_full	Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates
title_fullStr	Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates
title_full_unstemmed	Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates
title_sort	Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates
author	Barbetta, Luiz Delagnelo
author_facet	Barbetta, Luiz Delagnelo
author_role	author
dc.contributor.author.fl_str_mv	Barbetta, Luiz Delagnelo
dc.contributor.advisor1.fl_str_mv	Weingaertner, Walter Lindolfo
dc.contributor.advisor-co1.fl_str_mv	Kaierle, Stefan
contributor_str_mv	Weingaertner, Walter Lindolfo Kaierle, Stefan
dc.subject.por.fl_str_mv	Engenharia mecânica Soldagem Lasers
topic	Engenharia mecânica Soldagem Lasers
description	Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2014.
publishDate	2014
dc.date.issued.fl_str_mv	2014
dc.date.accessioned.fl_str_mv	2017-11-14T15:48:05Z
dc.date.available.fl_str_mv	2017-11-14T15:48:05Z
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	https://repositorio.ufsc.br/xmlui/handle/123456789/180922
dc.identifier.other.none.fl_str_mv	332922
identifier_str_mv	332922
url	https://repositorio.ufsc.br/xmlui/handle/123456789/180922
dc.language.iso.fl_str_mv	por
language	por
dc.rights.driver.fl_str_mv	info:eu-repo/semantics/openAccess
eu_rights_str_mv	openAccess
dc.source.none.fl_str_mv	reponame:Repositório Institucional da UFSC instname:Universidade Federal de Santa Catarina (UFSC) instacron:UFSC
instname_str	Universidade Federal de Santa Catarina (UFSC)
instacron_str	UFSC
institution	UFSC
reponame_str	Repositório Institucional da UFSC
collection	Repositório Institucional da UFSC
bitstream.url.fl_str_mv	https://repositorio.ufsc.br/bitstream/123456789/180922/1/PEMC1582-D.pdf https://repositorio.ufsc.br/bitstream/123456789/180922/2/license.txt
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Solidification flaw and porosity formation in hybrid laser: GMA welding of thick API 5L X70 steel plates

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