Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel

Autores
Basso, Alejandro Daniel; Toda Caraballo, Isaac; Eres Castellanos, Adriana; San Martin, David; Jimenez, José Antonio; Caballero, Francisca G.
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Casting processes show some weaknesses. A particular problem is presented when the workpiece needs to be subjected to heat treatments to achieve a desired microstructure. This problem arises from the microsegregation phenomena typically present in cast parts. The effect of the microsegregation on the martensitic and bainitic transformations has been investigated in a high carbon-high silicon cast steel, with the approximate composition Fe-0.8C-2Si-1Mn-1Cr (in wt. %), which was poured into 25 mm keel block-shaped sand molds. The microsegregation maps of Cr, Si, and Mn characterized by electron probe microanalysis (EPMA) show that interdendritic regions are enriched while dendrites are impoverished in these elements, implying that their partition coefficients are lower that the unity (k < 1). As-quenched martensitic and austempered bainitic microstructures (at 230 ⁰C) were obtained and analyzed after applying an austenitization heat treatment at 920 ⁰C (holding for 60 min). The thermal etching method used to reveal the prior austenite grain size showed a bimodal grain size distribution, with larger grains in the dendritic regions (≈22.4µm) than in the interdendritic ones (≈6.4 µm). This is likely due to both the microsegregation and the presence of small undissolved cementite precipitates. Electron Backscatter Diffraction (EBSD) analysis carried out on the martensitic microstructure do not unveil any differences in misorientation distribution frequency and block size between the dendritic and interdendritic zones related to the microsegregation and bimodality of the austenite grain size. On the contrary, the bainitic transformation starts earlier (incubation time of 80 min), proceeds faster and bainitic ferrite plates are longer in the dendritic zones, were prior austenite grains are larger and impoverish in solute. The presence of these microsegregation pattern leads to the non-uniform development of the bainitic reaction in cast parts, modifying its kinetics and the resulting microstructures, which would probably have a major impact on the mechanical properties.
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: Toda Caraballo, Isaac. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; España
Fil: Eres Castellanos, Adriana. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; España
Fil: San Martin, David. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; España
Fil: Jimenez, José Antonio. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; España
Fil: Caballero, Francisca G.. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; España
Materia
BAINITIC TRANSFORMATION
HIGH CARBON-HIGH SILICON CAST STEEL
MICROSEGREGATION
PRIOR AUSTENITE GRAIN SIZE
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:11336/138899
Acceder
id CONICETDig_547677d1968556cfaba2e8b170d9eb61
oai_identifier_str oai:ri.conicet.gov.ar:11336/138899
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steelBasso, Alejandro DanielToda Caraballo, IsaacEres Castellanos, AdrianaSan Martin, DavidJimenez, José AntonioCaballero, Francisca G.BAINITIC TRANSFORMATIONHIGH CARBON-HIGH SILICON CAST STEELMICROSEGREGATIONPRIOR AUSTENITE GRAIN SIZEhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Casting processes show some weaknesses. A particular problem is presented when the workpiece needs to be subjected to heat treatments to achieve a desired microstructure. This problem arises from the microsegregation phenomena typically present in cast parts. The effect of the microsegregation on the martensitic and bainitic transformations has been investigated in a high carbon-high silicon cast steel, with the approximate composition Fe-0.8C-2Si-1Mn-1Cr (in wt. %), which was poured into 25 mm keel block-shaped sand molds. The microsegregation maps of Cr, Si, and Mn characterized by electron probe microanalysis (EPMA) show that interdendritic regions are enriched while dendrites are impoverished in these elements, implying that their partition coefficients are lower that the unity (k < 1). As-quenched martensitic and austempered bainitic microstructures (at 230 ⁰C) were obtained and analyzed after applying an austenitization heat treatment at 920 ⁰C (holding for 60 min). The thermal etching method used to reveal the prior austenite grain size showed a bimodal grain size distribution, with larger grains in the dendritic regions (≈22.4µm) than in the interdendritic ones (≈6.4 µm). This is likely due to both the microsegregation and the presence of small undissolved cementite precipitates. Electron Backscatter Diffraction (EBSD) analysis carried out on the martensitic microstructure do not unveil any differences in misorientation distribution frequency and block size between the dendritic and interdendritic zones related to the microsegregation and bimodality of the austenite grain size. On the contrary, the bainitic transformation starts earlier (incubation time of 80 min), proceeds faster and bainitic ferrite plates are longer in the dendritic zones, were prior austenite grains are larger and impoverish in solute. The presence of these microsegregation pattern leads to the non-uniform development of the bainitic reaction in cast parts, modifying its kinetics and the resulting microstructures, which would probably have a major impact on the mechanical properties.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; ArgentinaFil: Toda Caraballo, Isaac. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; EspañaFil: Eres Castellanos, Adriana. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; EspañaFil: San Martin, David. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; EspañaFil: Jimenez, José Antonio. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; EspañaFil: Caballero, Francisca G.. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; EspañaMolecular Diversity Preservation International2020-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/138899Basso, Alejandro Daniel; Toda Caraballo, Isaac; Eres Castellanos, Adriana; San Martin, David; Jimenez, José Antonio; et al.; Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel; Molecular Diversity Preservation International; Metals; 10; 5; 5-2020; 1-282075-4701CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2075-4701/10/5/574info:eu-repo/semantics/altIdentifier/doi/10.3390/met10050574info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:22:21Zoai:ri.conicet.gov.ar:11336/138899instacron: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:34982025-10-15 14:22:21.379CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel
title Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel
spellingShingle Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel
Basso, Alejandro Daniel
BAINITIC TRANSFORMATION
HIGH CARBON-HIGH SILICON CAST STEEL
MICROSEGREGATION
PRIOR AUSTENITE GRAIN SIZE
title_short Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel
title_full Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel
title_fullStr Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel
title_full_unstemmed Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel
title_sort Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel
dc.creator.none.fl_str_mv Basso, Alejandro Daniel
Toda Caraballo, Isaac
Eres Castellanos, Adriana
San Martin, David
Jimenez, José Antonio
Caballero, Francisca G.
author Basso, Alejandro Daniel
author_facet Basso, Alejandro Daniel
Toda Caraballo, Isaac
Eres Castellanos, Adriana
San Martin, David
Jimenez, José Antonio
Caballero, Francisca G.
author_role author
author2 Toda Caraballo, Isaac
Eres Castellanos, Adriana
San Martin, David
Jimenez, José Antonio
Caballero, Francisca G.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv BAINITIC TRANSFORMATION
HIGH CARBON-HIGH SILICON CAST STEEL
MICROSEGREGATION
PRIOR AUSTENITE GRAIN SIZE
topic BAINITIC TRANSFORMATION
HIGH CARBON-HIGH SILICON CAST STEEL
MICROSEGREGATION
PRIOR AUSTENITE GRAIN SIZE
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Casting processes show some weaknesses. A particular problem is presented when the workpiece needs to be subjected to heat treatments to achieve a desired microstructure. This problem arises from the microsegregation phenomena typically present in cast parts. The effect of the microsegregation on the martensitic and bainitic transformations has been investigated in a high carbon-high silicon cast steel, with the approximate composition Fe-0.8C-2Si-1Mn-1Cr (in wt. %), which was poured into 25 mm keel block-shaped sand molds. The microsegregation maps of Cr, Si, and Mn characterized by electron probe microanalysis (EPMA) show that interdendritic regions are enriched while dendrites are impoverished in these elements, implying that their partition coefficients are lower that the unity (k < 1). As-quenched martensitic and austempered bainitic microstructures (at 230 ⁰C) were obtained and analyzed after applying an austenitization heat treatment at 920 ⁰C (holding for 60 min). The thermal etching method used to reveal the prior austenite grain size showed a bimodal grain size distribution, with larger grains in the dendritic regions (≈22.4µm) than in the interdendritic ones (≈6.4 µm). This is likely due to both the microsegregation and the presence of small undissolved cementite precipitates. Electron Backscatter Diffraction (EBSD) analysis carried out on the martensitic microstructure do not unveil any differences in misorientation distribution frequency and block size between the dendritic and interdendritic zones related to the microsegregation and bimodality of the austenite grain size. On the contrary, the bainitic transformation starts earlier (incubation time of 80 min), proceeds faster and bainitic ferrite plates are longer in the dendritic zones, were prior austenite grains are larger and impoverish in solute. The presence of these microsegregation pattern leads to the non-uniform development of the bainitic reaction in cast parts, modifying its kinetics and the resulting microstructures, which would probably have a major impact on the mechanical properties.
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: Toda Caraballo, Isaac. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; España
Fil: Eres Castellanos, Adriana. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; España
Fil: San Martin, David. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; España
Fil: Jimenez, José Antonio. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; España
Fil: Caballero, Francisca G.. Consejo Superior de Investigaciones Científicas. Centro Nacional de Investigaciones Metalúrgicas; España
description Casting processes show some weaknesses. A particular problem is presented when the workpiece needs to be subjected to heat treatments to achieve a desired microstructure. This problem arises from the microsegregation phenomena typically present in cast parts. The effect of the microsegregation on the martensitic and bainitic transformations has been investigated in a high carbon-high silicon cast steel, with the approximate composition Fe-0.8C-2Si-1Mn-1Cr (in wt. %), which was poured into 25 mm keel block-shaped sand molds. The microsegregation maps of Cr, Si, and Mn characterized by electron probe microanalysis (EPMA) show that interdendritic regions are enriched while dendrites are impoverished in these elements, implying that their partition coefficients are lower that the unity (k < 1). As-quenched martensitic and austempered bainitic microstructures (at 230 ⁰C) were obtained and analyzed after applying an austenitization heat treatment at 920 ⁰C (holding for 60 min). The thermal etching method used to reveal the prior austenite grain size showed a bimodal grain size distribution, with larger grains in the dendritic regions (≈22.4µm) than in the interdendritic ones (≈6.4 µm). This is likely due to both the microsegregation and the presence of small undissolved cementite precipitates. Electron Backscatter Diffraction (EBSD) analysis carried out on the martensitic microstructure do not unveil any differences in misorientation distribution frequency and block size between the dendritic and interdendritic zones related to the microsegregation and bimodality of the austenite grain size. On the contrary, the bainitic transformation starts earlier (incubation time of 80 min), proceeds faster and bainitic ferrite plates are longer in the dendritic zones, were prior austenite grains are larger and impoverish in solute. The presence of these microsegregation pattern leads to the non-uniform development of the bainitic reaction in cast parts, modifying its kinetics and the resulting microstructures, which would probably have a major impact on the mechanical properties.
publishDate 2020
dc.date.none.fl_str_mv 2020-05
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/11336/138899
Basso, Alejandro Daniel; Toda Caraballo, Isaac; Eres Castellanos, Adriana; San Martin, David; Jimenez, José Antonio; et al.; Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel; Molecular Diversity Preservation International; Metals; 10; 5; 5-2020; 1-28
2075-4701
CONICET Digital
CONICET
url http://hdl.handle.net/11336/138899
identifier_str_mv Basso, Alejandro Daniel; Toda Caraballo, Isaac; Eres Castellanos, Adriana; San Martin, David; Jimenez, José Antonio; et al.; Effect of the microsegregation on martensitic and bainitic reactions in a high carbon-high silicon cast steel; Molecular Diversity Preservation International; Metals; 10; 5; 5-2020; 1-28
2075-4701
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2075-4701/10/5/574
info:eu-repo/semantics/altIdentifier/doi/10.3390/met10050574
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
dc.publisher.none.fl_str_mv Molecular Diversity Preservation International
publisher.none.fl_str_mv Molecular Diversity Preservation International
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
_version_ 1846082622337318912
score 13.22299

Publicaciones similares