Microstructure and mechanical properties of two Api steels for iron ore pipelines

Detalhes bibliográficos
Autor(a) principal: Godefroid,Leonardo Barbosa
Data de Publicação: 2014
Outros Autores: Cândido,Luiz Cláudio, Toffolo,Rodrigo Vicente Bayão, Barbosa,Luiz Henrique Soares
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=S1516-14392014000700019
Resumo: This research compares the mechanical behavior of two API steels (X60 and X70) used in the longest pipeline in the world for the conveyance of iron ore. Tensile tests, Charpy impact tests, CTOD tests and fatigue crack growth tests are performed at ambient temperature. Metallographic examination showed a banded microstructure consisting of polygonal ferrite and pearlite in both steels, with smaller grain size and the presence of a small quantity of bainite in the X70 steel. All the mechanical tests revealed a ductile behavior for the two steels. The X70 steel is preferable for the pipeline project, due its better mechanical resistance, with no significant loss of fracture toughness and fatigue resistance. Its performance could be even better, if an appropriate combination of thermomechanical processing parameters were able to produce a microstructure with minor amount of pearlite, where acicular ferrite/bainite are present.
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spelling Microstructure and mechanical properties of two Api steels for iron ore pipelinesAPI steelsfracture toughnessfatigue crack growthThis research compares the mechanical behavior of two API steels (X60 and X70) used in the longest pipeline in the world for the conveyance of iron ore. Tensile tests, Charpy impact tests, CTOD tests and fatigue crack growth tests are performed at ambient temperature. Metallographic examination showed a banded microstructure consisting of polygonal ferrite and pearlite in both steels, with smaller grain size and the presence of a small quantity of bainite in the X70 steel. All the mechanical tests revealed a ductile behavior for the two steels. The X70 steel is preferable for the pipeline project, due its better mechanical resistance, with no significant loss of fracture toughness and fatigue resistance. Its performance could be even better, if an appropriate combination of thermomechanical processing parameters were able to produce a microstructure with minor amount of pearlite, where acicular ferrite/bainite are present.ABM, ABC, ABPol2014-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000700019Materials Research v.17 suppl.1 2014reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392014005000068info:eu-repo/semantics/openAccessGodefroid,Leonardo BarbosaCândido,Luiz CláudioToffolo,Rodrigo Vicente BayãoBarbosa,Luiz Henrique Soareseng2015-11-06T00:00:00Zoai:scielo:S1516-14392014000700019Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2015-11-06T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Microstructure and mechanical properties of two Api steels for iron ore pipelines
title Microstructure and mechanical properties of two Api steels for iron ore pipelines
spellingShingle Microstructure and mechanical properties of two Api steels for iron ore pipelines
Godefroid,Leonardo Barbosa
API steels
fracture toughness
fatigue crack growth
title_short Microstructure and mechanical properties of two Api steels for iron ore pipelines
title_full Microstructure and mechanical properties of two Api steels for iron ore pipelines
title_fullStr Microstructure and mechanical properties of two Api steels for iron ore pipelines
title_full_unstemmed Microstructure and mechanical properties of two Api steels for iron ore pipelines
title_sort Microstructure and mechanical properties of two Api steels for iron ore pipelines
author Godefroid,Leonardo Barbosa
author_facet Godefroid,Leonardo Barbosa
Cândido,Luiz Cláudio
Toffolo,Rodrigo Vicente Bayão
Barbosa,Luiz Henrique Soares
author_role author
author2 Cândido,Luiz Cláudio
Toffolo,Rodrigo Vicente Bayão
Barbosa,Luiz Henrique Soares
author2_role author
author
author
dc.contributor.author.fl_str_mv Godefroid,Leonardo Barbosa
Cândido,Luiz Cláudio
Toffolo,Rodrigo Vicente Bayão
Barbosa,Luiz Henrique Soares
dc.subject.por.fl_str_mv API steels
fracture toughness
fatigue crack growth
topic API steels
fracture toughness
fatigue crack growth
description This research compares the mechanical behavior of two API steels (X60 and X70) used in the longest pipeline in the world for the conveyance of iron ore. Tensile tests, Charpy impact tests, CTOD tests and fatigue crack growth tests are performed at ambient temperature. Metallographic examination showed a banded microstructure consisting of polygonal ferrite and pearlite in both steels, with smaller grain size and the presence of a small quantity of bainite in the X70 steel. All the mechanical tests revealed a ductile behavior for the two steels. The X70 steel is preferable for the pipeline project, due its better mechanical resistance, with no significant loss of fracture toughness and fatigue resistance. Its performance could be even better, if an appropriate combination of thermomechanical processing parameters were able to produce a microstructure with minor amount of pearlite, where acicular ferrite/bainite are present.
publishDate 2014
dc.date.none.fl_str_mv 2014-08-01
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=S1516-14392014000700019
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000700019
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392014005000068
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.17 suppl.1 2014
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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