Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittleness
Autor(a) principal: | |
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Data de Publicação: | 2002 |
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=S1516-14392002000200007 |
Resumo: | A hot rolled Zircaloy-4 alloy, annealed with a final cold rolling, presenting rounded grains, was studied. Hydrogen cathodic charge with a homogenization heat treatment was used to pre-charge the specimens with different hydrogen contents. Hydrogen embrittlement susceptibility analysis was held using J integral and J-R curve results from CT specimens (compact tension specimens) tested at room temperature. As J IC values showed scatter, toughness was evaluated for deltaa = 1mm. Toughness clearly tended to decrease as hydrogen content increased abruptly for low H contents and gradually for high contents. A few specimens with high hydrogen content failed in brittle mode, or presented instability and posterior crack arrest. Fractographic observations showed that, despite the records had presented no signs of brittle fracture, certain specimens showed cleavage-like zones. More cleavage-like area percentage was present the higher the hydrogen content was. |
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Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittlenessmechanical propertiesdelayed hydrogen crackingzircaloyhydridesA hot rolled Zircaloy-4 alloy, annealed with a final cold rolling, presenting rounded grains, was studied. Hydrogen cathodic charge with a homogenization heat treatment was used to pre-charge the specimens with different hydrogen contents. Hydrogen embrittlement susceptibility analysis was held using J integral and J-R curve results from CT specimens (compact tension specimens) tested at room temperature. As J IC values showed scatter, toughness was evaluated for deltaa = 1mm. Toughness clearly tended to decrease as hydrogen content increased abruptly for low H contents and gradually for high contents. A few specimens with high hydrogen content failed in brittle mode, or presented instability and posterior crack arrest. Fractographic observations showed that, despite the records had presented no signs of brittle fracture, certain specimens showed cleavage-like zones. More cleavage-like area percentage was present the higher the hydrogen content was.ABM, ABC, ABPol2002-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000200007Materials Research v.5 n.2 2002reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392002000200007info:eu-repo/semantics/openAccessBertolino,G.Meyer,G.Perez Ipiña,J.eng2002-09-05T00:00:00Zoai:scielo:S1516-14392002000200007Revistahttp://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 |
Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittleness |
title |
Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittleness |
spellingShingle |
Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittleness Bertolino,G. mechanical properties delayed hydrogen cracking zircaloy hydrides |
title_short |
Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittleness |
title_full |
Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittleness |
title_fullStr |
Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittleness |
title_full_unstemmed |
Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittleness |
title_sort |
Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittleness |
author |
Bertolino,G. |
author_facet |
Bertolino,G. Meyer,G. Perez Ipiña,J. |
author_role |
author |
author2 |
Meyer,G. Perez Ipiña,J. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Bertolino,G. Meyer,G. Perez Ipiña,J. |
dc.subject.por.fl_str_mv |
mechanical properties delayed hydrogen cracking zircaloy hydrides |
topic |
mechanical properties delayed hydrogen cracking zircaloy hydrides |
description |
A hot rolled Zircaloy-4 alloy, annealed with a final cold rolling, presenting rounded grains, was studied. Hydrogen cathodic charge with a homogenization heat treatment was used to pre-charge the specimens with different hydrogen contents. Hydrogen embrittlement susceptibility analysis was held using J integral and J-R curve results from CT specimens (compact tension specimens) tested at room temperature. As J IC values showed scatter, toughness was evaluated for deltaa = 1mm. Toughness clearly tended to decrease as hydrogen content increased abruptly for low H contents and gradually for high contents. A few specimens with high hydrogen content failed in brittle mode, or presented instability and posterior crack arrest. Fractographic observations showed that, despite the records had presented no signs of brittle fracture, certain specimens showed cleavage-like zones. More cleavage-like area percentage was present the higher the hydrogen content was. |
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=S1516-14392002000200007 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000200007 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392002000200007 |
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 |
_version_ |
1754212656951066624 |