Authors: Rawen Jday Olivier Marsan Jacques Bourdie Lydia Laffont Fabien Bruneseaux Jacques Lacaze
Publish Date: 2015/09/24
Volume: 68, Issue: 6, Pages: 1071-1074
Abstract
Growth of graphite during solidification and high temperature solidstate transformation has been investigated in samples cut out from a thin wall casting solidified partly in the stable iron–graphite and partly in the metastable iron–cementite systems To this end Raman spectroscopy has been used to characterize graphite nodules in ascast state and in samples which have been fully graphitized at various temperatures in the austenite field The results show no significant difference between Raman spectra recorded from these samples suggesting that graphite grows with the same mechanism during either solidification or hightemperature socalled first stage graphitization Transmission electron microscopy investigation is underway for complementing and checking these results
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