The Occurrence and the Effect of Casting Skin in Compacted Graphite Iron

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Most iron castings retain their as-cast surfaces because of their geometric complexity and to minimize the machining costs. However, the mechanical properties that are documented in standards (i.e. ASTM) are tested on fully machined test bars. Therefore, the effect of the as-cast surface and sub-sur...

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Autores principales: Boonmee, S., Stefanescu, D.M.
Formato: Artículo
Lenguaje:Inglés
Publicado: INTEMA - UNMdP-CONICET 2014
Acceso en línea:10 Th International Symposium on the Science and Processing of Cast Iron. 2014. Argentina: Mar del Plata 10 to 13th of November.
Aporte de:
RINFI - Facultad de Ingeniería (UNLdP) de Universidad Nacional de Mar del Plata (UNMdP)
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institution Universidad Nacional de Mar del Plata (UNMdP)
institution_str I-29
repository_str R-182
container_title_str RINFI - Facultad de Ingeniería (UNLdP)
language Inglés
format Artículo
author Boonmee, S.
Stefanescu, D.M.
spellingShingle Boonmee, S.
Stefanescu, D.M.
The Occurrence and the Effect of Casting Skin in Compacted Graphite Iron
author_facet Boonmee, S.
Stefanescu, D.M.
author_sort Boonmee, S.
title The Occurrence and the Effect of Casting Skin in Compacted Graphite Iron
title_short The Occurrence and the Effect of Casting Skin in Compacted Graphite Iron
title_full The Occurrence and the Effect of Casting Skin in Compacted Graphite Iron
title_fullStr The Occurrence and the Effect of Casting Skin in Compacted Graphite Iron
title_full_unstemmed The Occurrence and the Effect of Casting Skin in Compacted Graphite Iron
title_sort occurrence and the effect of casting skin in compacted graphite iron
description Most iron castings retain their as-cast surfaces because of their geometric complexity and to minimize the machining costs. However, the mechanical properties that are documented in standards (i.e. ASTM) are tested on fully machined test bars. Therefore, the effect of the as-cast surface and sub-surface features (commonly referred as “casting skin”) on mechanical properties should be evaluated. Preliminary works have shown the negative effect of the casting skin on mechanical properties of grey and ductile irons. This paper reviews the recent works on the casting skin effect on tensile and fatigue properties in compacted graphite and ductile irons. It was found that the tensile and fatigue strength were reduced by 9% and 40% respectively because of the presence of the casting skin. In addition, the correlations between processing parameters (e.g. nodularity and section thickness) and the casting skin features were presented. The experimental results suggest that the Mg depletion because of metal-mould and metal-air interactions was the main reason for the formation of the casting skin.
publisher INTEMA - UNMdP-CONICET
publishDate 2014
url 10 Th International Symposium on the Science and Processing of Cast Iron. 2014. Argentina: Mar del Plata 10 to 13th of November.
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