Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , |
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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Materials research (São Carlos. Online) |
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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 |
_version_ |
1754212671540953088 |