Mostrar el registro sencillo del ítem
dc.contributor.author
López, Marcos Gabriel
dc.contributor.author
Massone, Juan Miguel
dc.contributor.author
Boeri, Roberto Enrique
dc.date.available
2019-10-15T17:36:08Z
dc.date.issued
2018-06
dc.identifier.citation
López, Marcos Gabriel; Massone, Juan Miguel; Boeri, Roberto Enrique; Evolution of the macrostructure of gray cast iron from eutectic to hypereutectic composition; Trans Tech Publications; Materials Science Forum; 925; 6-2018; 110-117
dc.identifier.issn
0255-5476
dc.identifier.uri
http://hdl.handle.net/11336/85903
dc.description.abstract
This work studies the evolution of the macrostructure of gray cast iron as the carbon equivalent (CE) increases from near-eutectic to highly hypereutectic values. The macrostructure of spherical samples of flake graphite irons of CE ranging between 4.24% and 5.23% was revealed by using direct austempering after solidification technique (DAAS). The results were analysed by applying the concept of coupled zone for gray cast irons. The coupled zone is a region in the stable Fe-C-Si diagram in which solidification proceeds as a cooperative growth of both austenite and flake graphite. The coupled zone for gray cast iron is claimed to be asymmetrical as the eutectic reaction is extended towards the prolongation of the austenite liquidus line. All the samples investigated in the present study show the presence of relatively large austenite grains, demonstrating that the number of active nucleation sites of austenite per unit volume is small. The observation of the microstructure shows the presence of several units of coupled growth inside each austenite grain, what proves that many eutectic colonies have grown from the same austenite nucleus, even for highly hypereutectic compositions. Colour etching was employed to reveal the “hidden” dendrites present in the microstructure. The results suggest that proeutectic graphite is not a good nucleating agent for austenite. These results contribute to the understanding of the solidification of hypereutectic gray irons and verify the earlier understanding of the solidification of eutectic gray irons and its extension to hypereutectic compositions.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Trans Tech Publications
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AUSTENITE DENDRITES
dc.subject
COUPLED ZONE
dc.subject
HYPEREUTECTIC GRAY IRON
dc.subject
KISH GRAPHITE
dc.subject.classification
Ingeniería de los Materiales
dc.subject.classification
Ingeniería de los Materiales
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
Evolution of the macrostructure of gray cast iron from eutectic to hypereutectic composition
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-08-08T19:33:38Z
dc.journal.volume
925
dc.journal.pagination
110-117
dc.journal.pais
Suiza
dc.description.fil
Fil: López, Marcos Gabriel. 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
dc.description.fil
Fil: Massone, Juan Miguel. 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
dc.description.fil
Fil: Boeri, Roberto Enrique. 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
dc.journal.title
Materials Science Forum
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.scientific.net/MSF.925.110
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.4028/www.scientific.net/MSF.925.110
Archivos asociados