Investigation of friction hydro-pillar processing as a repair technique for offshore mooring chain links
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/270784 |
Resumo: | Repairing links of offshore mooring chains has presented a significant industry challenge, primarily arising from modifications in material properties, encompassing alterations in microstructure, hardness, and residual stress. In this context, the present work investigates the method of friction hydro-pillar processing (FHPP) applied to R4 grade mooring chain steel. Joints in as-repaired and post-weld heat treatment (PWHT) conditions were subjected to residual stress (RS) tests using the neutron diffraction technique, microhardness mapping, and microstructural evaluations. The process generated peaks of tensile and compressive stresses in different directions and hardness below that of the parent material in the softening zone. The friction zone promoted high hardness levels in the thermo-mechanically affected zone (TMAZ) with a maximum of 19% of the ultimate tensile strength of the parent material. As expected, the PWHT restored the RS and reduced the hardness; however, 4 h PWHT allowed the elimination of a hardness higher than that of the base material. |
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Santos, Rafael Eugenio dosChludzinski, MarianeNunes, Rafael MenezesMarinho, Ricardo ReppoldPaes, Marcelo Torres PizaReguly, Afonso2024-01-10T03:36:31Z20232504-4494http://hdl.handle.net/10183/270784001188459Repairing links of offshore mooring chains has presented a significant industry challenge, primarily arising from modifications in material properties, encompassing alterations in microstructure, hardness, and residual stress. In this context, the present work investigates the method of friction hydro-pillar processing (FHPP) applied to R4 grade mooring chain steel. Joints in as-repaired and post-weld heat treatment (PWHT) conditions were subjected to residual stress (RS) tests using the neutron diffraction technique, microhardness mapping, and microstructural evaluations. The process generated peaks of tensile and compressive stresses in different directions and hardness below that of the parent material in the softening zone. The friction zone promoted high hardness levels in the thermo-mechanically affected zone (TMAZ) with a maximum of 19% of the ultimate tensile strength of the parent material. As expected, the PWHT restored the RS and reduced the hardness; however, 4 h PWHT allowed the elimination of a hardness higher than that of the base material.application/pdfengJournal of Manufacturing and Materials Processing. Basel. Vol. 7, no. 6 (2023), art. 200, p. 1-13Resistência dos materiaisCorrente de amarraFricçãoFriction hydro-pillar processingMooring steel grade R4PWHTResidual stressNeutron diffractionInvestigation of friction hydro-pillar processing as a repair technique for offshore mooring chain linksEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001188459.pdf.txt001188459.pdf.txtExtracted Texttext/plain46599http://www.lume.ufrgs.br/bitstream/10183/270784/2/001188459.pdf.txt5c42cedf502180936030df18d70a7ec6MD52ORIGINAL001188459.pdfTexto completo (inglês)application/pdf42886932http://www.lume.ufrgs.br/bitstream/10183/270784/1/001188459.pdf0f7d907073dc0503346822a2842cbfc4MD5110183/2707842024-01-17 04:28:53.003673oai:www.lume.ufrgs.br:10183/270784Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-01-17T06:28:53Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Investigation of friction hydro-pillar processing as a repair technique for offshore mooring chain links |
title |
Investigation of friction hydro-pillar processing as a repair technique for offshore mooring chain links |
spellingShingle |
Investigation of friction hydro-pillar processing as a repair technique for offshore mooring chain links Santos, Rafael Eugenio dos Resistência dos materiais Corrente de amarra Fricção Friction hydro-pillar processing Mooring steel grade R4 PWHT Residual stress Neutron diffraction |
title_short |
Investigation of friction hydro-pillar processing as a repair technique for offshore mooring chain links |
title_full |
Investigation of friction hydro-pillar processing as a repair technique for offshore mooring chain links |
title_fullStr |
Investigation of friction hydro-pillar processing as a repair technique for offshore mooring chain links |
title_full_unstemmed |
Investigation of friction hydro-pillar processing as a repair technique for offshore mooring chain links |
title_sort |
Investigation of friction hydro-pillar processing as a repair technique for offshore mooring chain links |
author |
Santos, Rafael Eugenio dos |
author_facet |
Santos, Rafael Eugenio dos Chludzinski, Mariane Nunes, Rafael Menezes Marinho, Ricardo Reppold Paes, Marcelo Torres Piza Reguly, Afonso |
author_role |
author |
author2 |
Chludzinski, Mariane Nunes, Rafael Menezes Marinho, Ricardo Reppold Paes, Marcelo Torres Piza Reguly, Afonso |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Santos, Rafael Eugenio dos Chludzinski, Mariane Nunes, Rafael Menezes Marinho, Ricardo Reppold Paes, Marcelo Torres Piza Reguly, Afonso |
dc.subject.por.fl_str_mv |
Resistência dos materiais Corrente de amarra Fricção |
topic |
Resistência dos materiais Corrente de amarra Fricção Friction hydro-pillar processing Mooring steel grade R4 PWHT Residual stress Neutron diffraction |
dc.subject.eng.fl_str_mv |
Friction hydro-pillar processing Mooring steel grade R4 PWHT Residual stress Neutron diffraction |
description |
Repairing links of offshore mooring chains has presented a significant industry challenge, primarily arising from modifications in material properties, encompassing alterations in microstructure, hardness, and residual stress. In this context, the present work investigates the method of friction hydro-pillar processing (FHPP) applied to R4 grade mooring chain steel. Joints in as-repaired and post-weld heat treatment (PWHT) conditions were subjected to residual stress (RS) tests using the neutron diffraction technique, microhardness mapping, and microstructural evaluations. The process generated peaks of tensile and compressive stresses in different directions and hardness below that of the parent material in the softening zone. The friction zone promoted high hardness levels in the thermo-mechanically affected zone (TMAZ) with a maximum of 19% of the ultimate tensile strength of the parent material. As expected, the PWHT restored the RS and reduced the hardness; however, 4 h PWHT allowed the elimination of a hardness higher than that of the base material. |
publishDate |
2023 |
dc.date.issued.fl_str_mv |
2023 |
dc.date.accessioned.fl_str_mv |
2024-01-10T03:36:31Z |
dc.type.driver.fl_str_mv |
Estrangeiro 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://hdl.handle.net/10183/270784 |
dc.identifier.issn.pt_BR.fl_str_mv |
2504-4494 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001188459 |
identifier_str_mv |
2504-4494 001188459 |
url |
http://hdl.handle.net/10183/270784 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Journal of Manufacturing and Materials Processing. Basel. Vol. 7, no. 6 (2023), art. 200, p. 1-13 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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