Development of a methodology to study the hydrogen embrittlement of steels by means of the small punch test

Two different methodologies for analysing the deterioration of mechanical properties due to hydrogen embrittlement by means of the small punch test (SPT) have been studied. In the first, specimens were electrochemically pre-charged before testing, while in the second, they were charged at the same t...

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Autores: García, T.E., Rodríguez, C., Belzunce, F.J., Arroyo Martínez, Borja|||0000-0003-3037-652X
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/35166
Acceso en línea:https://hdl.handle.net/10902/35166
Access Level:acceso abierto
Palabra clave:Small punch test
Hydrogen embrittlement
Structural steel
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spelling Development of a methodology to study the hydrogen embrittlement of steels by means of the small punch testGarcía, T.E.Rodríguez, C.Belzunce, F.J.Arroyo Martínez, Borja|||0000-0003-3037-652X Small punch testHydrogen embrittlementStructural steelTwo different methodologies for analysing the deterioration of mechanical properties due to hydrogen embrittlement by means of the small punch test (SPT) have been studied. In the first, specimens were electrochemically pre-charged before testing, while in the second, they were charged at the same time as testing. A novel, simple, easy-to-manage SPT device was developed for the latter purpose. Two different CrMoV steel grades, a base and a weld metal, tempered at different temperatures, were tested. Tensile tests of hydrogen pre-charged specimens as well as hydrogen content measurements were also performed. Greater hydrogen absorption was observed in the higher strength CrMoV weld metal due to its microstructure composed of low tempered bainite. This steel was fully embrittled in both tensile and small punch tests in the presence of hydrogen, and no significant difference between the two SPT methodologies were found in this case. The CrMoV base metal was only embrittled, however, when hydrogen charging was performed at the same time as testing, showing the greater suitability of this small punch test methodology. The fracture pattern of SPT specimens changed completely from ductile to brittle when testing in hydrogen. Typical SPT parameters also exhibited a marked decrease in ductility and fracture toughness, the CrMoV weld metal being more susceptible to hydrogen embrittlement. Finally, the feasibility of the small punch test for ranking the hydrogen embrittlement susceptibility in steels was demonstrated, and the most suitable SPT parameters for analysing the reduction in mechanical properties were defined.The authors gratefully acknowledge funding from the Ministry of Science and Innovation of Spain through project MICINN-12-MAT2011-28796-C03-03. T.E. García also acknowledges financial support from the Principado de Asturias Government through the Severo Ochoa Programme (BP12-160).Elsevier ScienceUniversidad de Cantabria20152015-02-25journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttps://hdl.handle.net/10902/35166Materials Science & Engineering. A, 2015, 626, 342-351reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/351662026-06-02T12:39:31Z
dc.title.none.fl_str_mv Development of a methodology to study the hydrogen embrittlement of steels by means of the small punch test
title Development of a methodology to study the hydrogen embrittlement of steels by means of the small punch test
spellingShingle Development of a methodology to study the hydrogen embrittlement of steels by means of the small punch test
García, T.E.
Small punch test
Hydrogen embrittlement
Structural steel
title_short Development of a methodology to study the hydrogen embrittlement of steels by means of the small punch test
title_full Development of a methodology to study the hydrogen embrittlement of steels by means of the small punch test
title_fullStr Development of a methodology to study the hydrogen embrittlement of steels by means of the small punch test
title_full_unstemmed Development of a methodology to study the hydrogen embrittlement of steels by means of the small punch test
title_sort Development of a methodology to study the hydrogen embrittlement of steels by means of the small punch test
dc.creator.none.fl_str_mv García, T.E.
Rodríguez, C.
Belzunce, F.J.
Arroyo Martínez, Borja|||0000-0003-3037-652X
author García, T.E.
author_facet García, T.E.
Rodríguez, C.
Belzunce, F.J.
Arroyo Martínez, Borja|||0000-0003-3037-652X
author_role author
author2 Rodríguez, C.
Belzunce, F.J.
Arroyo Martínez, Borja|||0000-0003-3037-652X
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv Small punch test
Hydrogen embrittlement
Structural steel
topic Small punch test
Hydrogen embrittlement
Structural steel
description Two different methodologies for analysing the deterioration of mechanical properties due to hydrogen embrittlement by means of the small punch test (SPT) have been studied. In the first, specimens were electrochemically pre-charged before testing, while in the second, they were charged at the same time as testing. A novel, simple, easy-to-manage SPT device was developed for the latter purpose. Two different CrMoV steel grades, a base and a weld metal, tempered at different temperatures, were tested. Tensile tests of hydrogen pre-charged specimens as well as hydrogen content measurements were also performed. Greater hydrogen absorption was observed in the higher strength CrMoV weld metal due to its microstructure composed of low tempered bainite. This steel was fully embrittled in both tensile and small punch tests in the presence of hydrogen, and no significant difference between the two SPT methodologies were found in this case. The CrMoV base metal was only embrittled, however, when hydrogen charging was performed at the same time as testing, showing the greater suitability of this small punch test methodology. The fracture pattern of SPT specimens changed completely from ductile to brittle when testing in hydrogen. Typical SPT parameters also exhibited a marked decrease in ductility and fracture toughness, the CrMoV weld metal being more susceptible to hydrogen embrittlement. Finally, the feasibility of the small punch test for ranking the hydrogen embrittlement susceptibility in steels was demonstrated, and the most suitable SPT parameters for analysing the reduction in mechanical properties were defined.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-02-25
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10902/35166
url https://hdl.handle.net/10902/35166
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv Materials Science & Engineering. A, 2015, 626, 342-351
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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