Local Approach to Fracture of an Aged Duplex Stainless Steel

Detalhes bibliográficos
Autor(a) principal: Hazarabedian,Alfredo
Data de Publicação: 2002
Outros Autores: Forget,Pierre, Marini,Bernard
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=S1516-14392002000200008
Resumo: The local approach to fracture (LAF) is a methodology aimed to calculate macroscopic fracture properties of a body, from the knowledge of the local stress - strain field at the fracture site, and the modeling of the acting fracture mechanisms. In the present work, this method was applied to a CF8M steel, aged 30000h at 325 °C, in order to elucidate if LAF could be able to describe the measured fracture toughness data. We have simulated the elastoplastic behavior using the Gurson model and the general methodology of Joly. The required parameters were obtained from the stress strain curve and from the damage progression study by quantitative metallography. We extended the validity of that methodology for a material aged in a more realistic condition, i.e. at a relatively lower temperature and for a longer time. The model was found satisfactory because it was able to describe the experimental distribution of the fracture probability vs. fracture strain of notched axisymmetric specimens, without any parameter fitting. The model also predicted the lower bound of the experimental distribution of the crack resistance at 0.2 mm of crack extension (J02).
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spelling Local Approach to Fracture of an Aged Duplex Stainless Steellocal approach to fracturetoughnessduplex stainless steelsagingThe local approach to fracture (LAF) is a methodology aimed to calculate macroscopic fracture properties of a body, from the knowledge of the local stress - strain field at the fracture site, and the modeling of the acting fracture mechanisms. In the present work, this method was applied to a CF8M steel, aged 30000h at 325 °C, in order to elucidate if LAF could be able to describe the measured fracture toughness data. We have simulated the elastoplastic behavior using the Gurson model and the general methodology of Joly. The required parameters were obtained from the stress strain curve and from the damage progression study by quantitative metallography. We extended the validity of that methodology for a material aged in a more realistic condition, i.e. at a relatively lower temperature and for a longer time. The model was found satisfactory because it was able to describe the experimental distribution of the fracture probability vs. fracture strain of notched axisymmetric specimens, without any parameter fitting. The model also predicted the lower bound of the experimental distribution of the crack resistance at 0.2 mm of crack extension (J02).ABM, ABC, ABPol2002-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000200008Materials Research v.5 n.2 2002reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392002000200008info:eu-repo/semantics/openAccessHazarabedian,AlfredoForget,PierreMarini,Bernardeng2002-09-05T00:00:00Zoai:scielo:S1516-14392002000200008Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2002-09-05T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Local Approach to Fracture of an Aged Duplex Stainless Steel
title Local Approach to Fracture of an Aged Duplex Stainless Steel
spellingShingle Local Approach to Fracture of an Aged Duplex Stainless Steel
Hazarabedian,Alfredo
local approach to fracture
toughness
duplex stainless steels
aging
title_short Local Approach to Fracture of an Aged Duplex Stainless Steel
title_full Local Approach to Fracture of an Aged Duplex Stainless Steel
title_fullStr Local Approach to Fracture of an Aged Duplex Stainless Steel
title_full_unstemmed Local Approach to Fracture of an Aged Duplex Stainless Steel
title_sort Local Approach to Fracture of an Aged Duplex Stainless Steel
author Hazarabedian,Alfredo
author_facet Hazarabedian,Alfredo
Forget,Pierre
Marini,Bernard
author_role author
author2 Forget,Pierre
Marini,Bernard
author2_role author
author
dc.contributor.author.fl_str_mv Hazarabedian,Alfredo
Forget,Pierre
Marini,Bernard
dc.subject.por.fl_str_mv local approach to fracture
toughness
duplex stainless steels
aging
topic local approach to fracture
toughness
duplex stainless steels
aging
description The local approach to fracture (LAF) is a methodology aimed to calculate macroscopic fracture properties of a body, from the knowledge of the local stress - strain field at the fracture site, and the modeling of the acting fracture mechanisms. In the present work, this method was applied to a CF8M steel, aged 30000h at 325 °C, in order to elucidate if LAF could be able to describe the measured fracture toughness data. We have simulated the elastoplastic behavior using the Gurson model and the general methodology of Joly. The required parameters were obtained from the stress strain curve and from the damage progression study by quantitative metallography. We extended the validity of that methodology for a material aged in a more realistic condition, i.e. at a relatively lower temperature and for a longer time. The model was found satisfactory because it was able to describe the experimental distribution of the fracture probability vs. fracture strain of notched axisymmetric specimens, without any parameter fitting. The model also predicted the lower bound of the experimental distribution of the crack resistance at 0.2 mm of crack extension (J02).
publishDate 2002
dc.date.none.fl_str_mv 2002-06-01
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=S1516-14392002000200008
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000200008
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392002000200008
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.5 n.2 2002
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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