Development and characterization of a new type of ductile iron with a novel multi-phase microstructure

Autores
Lagarde, Mayra; Basso, Alejandro Daniel; Dommarco, Ricardo; Sikora, Jorge Antonio
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Over the last few years two new types of Ductile Iron (DI) have been developed based on Austempered DI (ADI), called Dual Phase ADI and Carbidic ADI (CADI), respectively. In the light of the experience acquired when studying these DI variants, the authors found motivating the possibility of obtaining a new type of multi-phase DI (MPDI), combining their main microstructural characteristics. A DI melt alloyed with 2%Cr, exhibiting free carbides and a pearlitic matrix in its as-cast condition, was used. The upper (UCT) and lower (LCT) critical temperatures of the Fe–C–Si equilibrium diagram region, where ferrite (α), austenite (γ) and graphite (Gr) coexist (called “intercritical interval”), were determined by heat treatment and microstructural analysis on samples previously annealed. Carbides stability was studied, and its dissolution was found to be negligible. It was possible to obtain free or allotriomorphic ferrite and austenite by isothermal austenitizing at temperatures within the intercritical interval, and then transform the remaining austenite into ausferrite after an austempering step. Therefore, multi- phase microstructures composed of graphite nodules, free carbides, free ferrite and ausferrite were obtained. The possibility of obtaining MPDI directly from the as-cast structure was also analyzed, and it was found that very similar microstructures to those previously annealed can be obtained by austenitizing samples at the same temperature range. These results proved that the pearlite → austenite transformation kinetics is rapid, as it took only one hour for the transformation to occur.
Fil: Lagarde, Mayra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; Argentina
Fil: Basso, Alejandro Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; Argentina
Fil: Dommarco, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; Argentina
Fil: Sikora, Jorge Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; Argentina
Materia
Ductile Iron
Adi
Multi-Phase Microstructure
Ausferrite
Ferrite
Carbides
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/16019
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/16019
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Development and characterization of a new type of ductile iron with a novel multi-phase microstructureLagarde, MayraBasso, Alejandro DanielDommarco, RicardoSikora, Jorge AntonioDuctile IronAdiMulti-Phase MicrostructureAusferriteFerriteCarbideshttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Over the last few years two new types of Ductile Iron (DI) have been developed based on Austempered DI (ADI), called Dual Phase ADI and Carbidic ADI (CADI), respectively. In the light of the experience acquired when studying these DI variants, the authors found motivating the possibility of obtaining a new type of multi-phase DI (MPDI), combining their main microstructural characteristics. A DI melt alloyed with 2%Cr, exhibiting free carbides and a pearlitic matrix in its as-cast condition, was used. The upper (UCT) and lower (LCT) critical temperatures of the Fe–C–Si equilibrium diagram region, where ferrite (α), austenite (γ) and graphite (Gr) coexist (called “intercritical interval”), were determined by heat treatment and microstructural analysis on samples previously annealed. Carbides stability was studied, and its dissolution was found to be negligible. It was possible to obtain free or allotriomorphic ferrite and austenite by isothermal austenitizing at temperatures within the intercritical interval, and then transform the remaining austenite into ausferrite after an austempering step. Therefore, multi- phase microstructures composed of graphite nodules, free carbides, free ferrite and ausferrite were obtained. The possibility of obtaining MPDI directly from the as-cast structure was also analyzed, and it was found that very similar microstructures to those previously annealed can be obtained by austenitizing samples at the same temperature range. These results proved that the pearlite → austenite transformation kinetics is rapid, as it took only one hour for the transformation to occur.Fil: Lagarde, Mayra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; ArgentinaFil: Basso, Alejandro Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; ArgentinaFil: Dommarco, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; ArgentinaFil: Sikora, Jorge Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; ArgentinaThe Iron and Steel Institute of Japan2010-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/16019Lagarde, Mayra; Basso, Alejandro Daniel; Dommarco, Ricardo; Sikora, Jorge Antonio; Development and characterization of a new type of ductile iron with a novel multi-phase microstructure; The Iron and Steel Institute of Japan; Isij International; 51; 4; 12-2010; 645-6500915-15591347-5460enginfo:eu-repo/semantics/altIdentifier/doi/10.2355/isijinternational.51.645info:eu-repo/semantics/altIdentifier/url/https://www.jstage.jst.go.jp/article/isijinternational/51/4/51_4_645/_articleinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:58:41Zoai:ri.conicet.gov.ar:11336/16019instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:58:42.011CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Development and characterization of a new type of ductile iron with a novel multi-phase microstructure
title Development and characterization of a new type of ductile iron with a novel multi-phase microstructure
spellingShingle Development and characterization of a new type of ductile iron with a novel multi-phase microstructure
Lagarde, Mayra
Ductile Iron
Adi
Multi-Phase Microstructure
Ausferrite
Ferrite
Carbides
title_short Development and characterization of a new type of ductile iron with a novel multi-phase microstructure
title_full Development and characterization of a new type of ductile iron with a novel multi-phase microstructure
title_fullStr Development and characterization of a new type of ductile iron with a novel multi-phase microstructure
title_full_unstemmed Development and characterization of a new type of ductile iron with a novel multi-phase microstructure
title_sort Development and characterization of a new type of ductile iron with a novel multi-phase microstructure
dc.creator.none.fl_str_mv Lagarde, Mayra
Basso, Alejandro Daniel
Dommarco, Ricardo
Sikora, Jorge Antonio
author Lagarde, Mayra
author_facet Lagarde, Mayra
Basso, Alejandro Daniel
Dommarco, Ricardo
Sikora, Jorge Antonio
author_role author
author2 Basso, Alejandro Daniel
Dommarco, Ricardo
Sikora, Jorge Antonio
author2_role author
author
author
dc.subject.none.fl_str_mv Ductile Iron
Adi
Multi-Phase Microstructure
Ausferrite
Ferrite
Carbides
topic Ductile Iron
Adi
Multi-Phase Microstructure
Ausferrite
Ferrite
Carbides
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Over the last few years two new types of Ductile Iron (DI) have been developed based on Austempered DI (ADI), called Dual Phase ADI and Carbidic ADI (CADI), respectively. In the light of the experience acquired when studying these DI variants, the authors found motivating the possibility of obtaining a new type of multi-phase DI (MPDI), combining their main microstructural characteristics. A DI melt alloyed with 2%Cr, exhibiting free carbides and a pearlitic matrix in its as-cast condition, was used. The upper (UCT) and lower (LCT) critical temperatures of the Fe–C–Si equilibrium diagram region, where ferrite (α), austenite (γ) and graphite (Gr) coexist (called “intercritical interval”), were determined by heat treatment and microstructural analysis on samples previously annealed. Carbides stability was studied, and its dissolution was found to be negligible. It was possible to obtain free or allotriomorphic ferrite and austenite by isothermal austenitizing at temperatures within the intercritical interval, and then transform the remaining austenite into ausferrite after an austempering step. Therefore, multi- phase microstructures composed of graphite nodules, free carbides, free ferrite and ausferrite were obtained. The possibility of obtaining MPDI directly from the as-cast structure was also analyzed, and it was found that very similar microstructures to those previously annealed can be obtained by austenitizing samples at the same temperature range. These results proved that the pearlite → austenite transformation kinetics is rapid, as it took only one hour for the transformation to occur.
Fil: Lagarde, Mayra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; Argentina
Fil: Basso, Alejandro Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; Argentina
Fil: Dommarco, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; Argentina
Fil: Sikora, Jorge Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones En Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones En Ciencia y Tecnología de Materiales; Argentina
description Over the last few years two new types of Ductile Iron (DI) have been developed based on Austempered DI (ADI), called Dual Phase ADI and Carbidic ADI (CADI), respectively. In the light of the experience acquired when studying these DI variants, the authors found motivating the possibility of obtaining a new type of multi-phase DI (MPDI), combining their main microstructural characteristics. A DI melt alloyed with 2%Cr, exhibiting free carbides and a pearlitic matrix in its as-cast condition, was used. The upper (UCT) and lower (LCT) critical temperatures of the Fe–C–Si equilibrium diagram region, where ferrite (α), austenite (γ) and graphite (Gr) coexist (called “intercritical interval”), were determined by heat treatment and microstructural analysis on samples previously annealed. Carbides stability was studied, and its dissolution was found to be negligible. It was possible to obtain free or allotriomorphic ferrite and austenite by isothermal austenitizing at temperatures within the intercritical interval, and then transform the remaining austenite into ausferrite after an austempering step. Therefore, multi- phase microstructures composed of graphite nodules, free carbides, free ferrite and ausferrite were obtained. The possibility of obtaining MPDI directly from the as-cast structure was also analyzed, and it was found that very similar microstructures to those previously annealed can be obtained by austenitizing samples at the same temperature range. These results proved that the pearlite → austenite transformation kinetics is rapid, as it took only one hour for the transformation to occur.
publishDate 2010
dc.date.none.fl_str_mv 2010-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/16019
Lagarde, Mayra; Basso, Alejandro Daniel; Dommarco, Ricardo; Sikora, Jorge Antonio; Development and characterization of a new type of ductile iron with a novel multi-phase microstructure; The Iron and Steel Institute of Japan; Isij International; 51; 4; 12-2010; 645-650
0915-1559
1347-5460
url http://hdl.handle.net/11336/16019
identifier_str_mv Lagarde, Mayra; Basso, Alejandro Daniel; Dommarco, Ricardo; Sikora, Jorge Antonio; Development and characterization of a new type of ductile iron with a novel multi-phase microstructure; The Iron and Steel Institute of Japan; Isij International; 51; 4; 12-2010; 645-650
0915-1559
1347-5460
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.2355/isijinternational.51.645
info:eu-repo/semantics/altIdentifier/url/https://www.jstage.jst.go.jp/article/isijinternational/51/4/51_4_645/_article
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv The Iron and Steel Institute of Japan
publisher.none.fl_str_mv The Iron and Steel Institute of Japan
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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