Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process

Detalhes bibliográficos
Autor(a) principal: Silva,Rafael de Paula
Data de Publicação: 2017
Outros Autores: Faria,Maria Ismenia Sodero Toledo, Almeida,Luiz Fernando Cursino Briet de, Nunes,Carlos Angelo, Vieira,Décio, Borges Júnior,Wanderlei
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000601622
Resumo: CA6NM steel is widely used in the manufacture of hydraulic turbines metallic parts, due to its resistance to corrosion and cavitation damage, combined with good weldability and fatigue properties. However, welding of this type of steel is complex and to ensure a minimum residual stress after welding it is necessary perform a post welding heat treatment (PWHT) of the part. This study aims to analyze the effect of a PWHT on the microstructure and mechanical properties of CA6NM steel weld joint produced by the FCAW process and compare it with the characteristics of an as-welded joint. A martensitic microstructure has been present in both materials. However, the PWHT material has shown finely dispersed retained austenite, in an amount near 10 vol.%. Vickers microhardness values of all regions of PWHT welded joint present lower hardness values compared to those of the as-welded joint. Despite nearly identical toughness values of the weld metal from AW and PWHT samples, results of fracture analysis have shown distinct features in appearance of the fractures.
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spelling Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Processmartensitic stainless steelASTM A743 CA6NMFCAW processCA6NM steel is widely used in the manufacture of hydraulic turbines metallic parts, due to its resistance to corrosion and cavitation damage, combined with good weldability and fatigue properties. However, welding of this type of steel is complex and to ensure a minimum residual stress after welding it is necessary perform a post welding heat treatment (PWHT) of the part. This study aims to analyze the effect of a PWHT on the microstructure and mechanical properties of CA6NM steel weld joint produced by the FCAW process and compare it with the characteristics of an as-welded joint. A martensitic microstructure has been present in both materials. However, the PWHT material has shown finely dispersed retained austenite, in an amount near 10 vol.%. Vickers microhardness values of all regions of PWHT welded joint present lower hardness values compared to those of the as-welded joint. Despite nearly identical toughness values of the weld metal from AW and PWHT samples, results of fracture analysis have shown distinct features in appearance of the fractures.ABM, ABC, ABPol2017-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000601622Materials Research v.20 n.6 2017reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2017-0468info:eu-repo/semantics/openAccessSilva,Rafael de PaulaFaria,Maria Ismenia Sodero ToledoAlmeida,Luiz Fernando Cursino Briet deNunes,Carlos AngeloVieira,DécioBorges Júnior,Wanderleieng2018-05-18T00:00:00Zoai:scielo:S1516-14392017000601622Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2018-05-18T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process
title Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process
spellingShingle Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process
Silva,Rafael de Paula
martensitic stainless steel
ASTM A743 CA6NM
FCAW process
title_short Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process
title_full Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process
title_fullStr Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process
title_full_unstemmed Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process
title_sort Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process
author Silva,Rafael de Paula
author_facet Silva,Rafael de Paula
Faria,Maria Ismenia Sodero Toledo
Almeida,Luiz Fernando Cursino Briet de
Nunes,Carlos Angelo
Vieira,Décio
Borges Júnior,Wanderlei
author_role author
author2 Faria,Maria Ismenia Sodero Toledo
Almeida,Luiz Fernando Cursino Briet de
Nunes,Carlos Angelo
Vieira,Décio
Borges Júnior,Wanderlei
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Silva,Rafael de Paula
Faria,Maria Ismenia Sodero Toledo
Almeida,Luiz Fernando Cursino Briet de
Nunes,Carlos Angelo
Vieira,Décio
Borges Júnior,Wanderlei
dc.subject.por.fl_str_mv martensitic stainless steel
ASTM A743 CA6NM
FCAW process
topic martensitic stainless steel
ASTM A743 CA6NM
FCAW process
description CA6NM steel is widely used in the manufacture of hydraulic turbines metallic parts, due to its resistance to corrosion and cavitation damage, combined with good weldability and fatigue properties. However, welding of this type of steel is complex and to ensure a minimum residual stress after welding it is necessary perform a post welding heat treatment (PWHT) of the part. This study aims to analyze the effect of a PWHT on the microstructure and mechanical properties of CA6NM steel weld joint produced by the FCAW process and compare it with the characteristics of an as-welded joint. A martensitic microstructure has been present in both materials. However, the PWHT material has shown finely dispersed retained austenite, in an amount near 10 vol.%. Vickers microhardness values of all regions of PWHT welded joint present lower hardness values compared to those of the as-welded joint. Despite nearly identical toughness values of the weld metal from AW and PWHT samples, results of fracture analysis have shown distinct features in appearance of the fractures.
publishDate 2017
dc.date.none.fl_str_mv 2017-12-01
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=S1516-14392017000601622
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000601622
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1980-5373-mr-2017-0468
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 ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.20 n.6 2017
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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