A Possible Mechanism for the Formation of Exploded Graphite in Nodular Cast Irons

Abstract : In hypereutectic nodular cast irons, primary precipitation of graphite may lead to graphite flotation in thick section castings. Graphite degeneracy such as so-called exploded graphite is then often associated with this flotation phenomenon and it appears as precipitates where the nodular form is replaced by star-like or flower-like shape. It has been reported that exploded graphite develops after the primary spheroidal nodules have reached some tens of microns in diameter. In this contribution, a model for this transition is presented.
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Roxana Gerghu, Lena Magnusson Åberg, Jacques Lacaze. A Possible Mechanism for the Formation of Exploded Graphite in Nodular Cast Irons. Materials Science Forum, Trans Tech Publications Inc., 2014, 790-791, pp. 435-440. ⟨10.4028/www.scientific.net/MSF.790-791.435⟩. ⟨hal-01170515⟩

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