Nucleation rate and number of precipitates in V and Nb-microalloyed steels

Recrystallization-precipitation-time-temperature (RPTT) diagrams were experimentally determined for two microalloyed steels with V and Nb, respectively, at a strain of 0.35 and a strain rate of 3.63 s-1. From the RPTT diagrams, and applying the classic theory of nucleation, the nucleation rate was c...

Descripción completa

Detalles Bibliográficos
Autores: Medina, Sebastián F., Gómez, Manuel
Tipo de recurso: artículo
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/109665
Acceso en línea:http://hdl.handle.net/10261/109665
Access Level:acceso abierto
Palabra clave:Nucleation rate
Nucleus size
Precipitate
Microalloyed steel
id ES_4fb0ad8e7fda9b641a2cea6e0bded2cc
oai_identifier_str oai:digital.csic.es:10261/109665
network_acronym_str ES
network_name_str España
repository_id_str
spelling Nucleation rate and number of precipitates in V and Nb-microalloyed steelsMedina, Sebastián F.Gómez, ManuelNucleation rateNucleus sizePrecipitateMicroalloyed steelRecrystallization-precipitation-time-temperature (RPTT) diagrams were experimentally determined for two microalloyed steels with V and Nb, respectively, at a strain of 0.35 and a strain rate of 3.63 s-1. From the RPTT diagrams, and applying the classic theory of nucleation, the nucleation rate was calculated for both steels. In order to determine the mentioned magnitudes, several parameters were calculated, such as: the Zeldovich factor (Z), the energy of formation of the nucleus (¿G), the driving force for precipitation (¿Gv), the critical radius for nucleation (Rc), and the dislocation density at the start of precipitation (¿), among others. The calculated data has made it possible to clarify the shape of precipitation start and finish curves and to plot the nucleation rate as a function of temperature. The number of precipitates was calculated by integration of the nucleation rate expression. In this way, substantial differences were established between the two types of microalloyed steels, including the final size of the V(C, N) and Nb(C, N) precipitates.Peer ReviewedTrans Tech Publications2015201520142015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/109665reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1096652026-05-22T06:33:51Z
dc.title.none.fl_str_mv Nucleation rate and number of precipitates in V and Nb-microalloyed steels
title Nucleation rate and number of precipitates in V and Nb-microalloyed steels
spellingShingle Nucleation rate and number of precipitates in V and Nb-microalloyed steels
Medina, Sebastián F.
Nucleation rate
Nucleus size
Precipitate
Microalloyed steel
title_short Nucleation rate and number of precipitates in V and Nb-microalloyed steels
title_full Nucleation rate and number of precipitates in V and Nb-microalloyed steels
title_fullStr Nucleation rate and number of precipitates in V and Nb-microalloyed steels
title_full_unstemmed Nucleation rate and number of precipitates in V and Nb-microalloyed steels
title_sort Nucleation rate and number of precipitates in V and Nb-microalloyed steels
dc.creator.none.fl_str_mv Medina, Sebastián F.
Gómez, Manuel
author Medina, Sebastián F.
author_facet Medina, Sebastián F.
Gómez, Manuel
author_role author
author2 Gómez, Manuel
author2_role author
dc.subject.none.fl_str_mv Nucleation rate
Nucleus size
Precipitate
Microalloyed steel
topic Nucleation rate
Nucleus size
Precipitate
Microalloyed steel
description Recrystallization-precipitation-time-temperature (RPTT) diagrams were experimentally determined for two microalloyed steels with V and Nb, respectively, at a strain of 0.35 and a strain rate of 3.63 s-1. From the RPTT diagrams, and applying the classic theory of nucleation, the nucleation rate was calculated for both steels. In order to determine the mentioned magnitudes, several parameters were calculated, such as: the Zeldovich factor (Z), the energy of formation of the nucleus (¿G), the driving force for precipitation (¿Gv), the critical radius for nucleation (Rc), and the dislocation density at the start of precipitation (¿), among others. The calculated data has made it possible to clarify the shape of precipitation start and finish curves and to plot the nucleation rate as a function of temperature. The number of precipitates was calculated by integration of the nucleation rate expression. In this way, substantial differences were established between the two types of microalloyed steels, including the final size of the V(C, N) and Nb(C, N) precipitates.
publishDate 2014
dc.date.none.fl_str_mv 2014
2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/109665
url http://hdl.handle.net/10261/109665
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Trans Tech Publications
publisher.none.fl_str_mv Trans Tech Publications
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869407835497955328
score 15,81155

Similares en LA Referencia