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Analysis of Nuclei in a Heavy-Section Nodular Iron Casting

Celis, Mayerling Martinez and Domengès, Bernadette and Hug, Eric and Lacaze, Jacques Analysis of Nuclei in a Heavy-Section Nodular Iron Casting. (2018) Materials Science Forum, 925. 173-180. ISSN 1662-9752

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Official URL: https://doi.org/10.4028/www.scientific.net/MSF.925.173


The microstructure of heavy section nodular graphite cast irons often presents a bimodal distribution of nodule size associated with so-called primary and secondary graphite nucleation. It has been found that the nuclei in both types of nodules consist mainly in magnesium sulphide. However, nuclei in primary nodules contain some traces of calcium and are thus related with the inoculation treatment. On the contrary, nuclei in secondary nodules do not contain any element that could be associated to inoculation. It is suggested they form in the late stage of the eutectic reaction as a result of microsegregation build-up in magnesium and sulphur.

Item Type:Article
HAL Id:hal-01984770
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure d'Ingénieurs de Caen - ENSICAEN (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > NXP Semiconductors (FRANCE)
Other partners > Presto Engineering Europe (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Caen Basse-Normandie (FRANCE)
Laboratory name:
French National Research Agency (ANR)
Deposited On:17 Jan 2019 10:52

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