Magnesium fading in conjunction with directional solidification has been used to determine the conditions for the structural transition from flake to compacted to nodular graphite in a hypoeutectic and a hypereutectic cast iron. Results are presented in terms of predominance-area diagrams and the conditions for stability are given. Magnesium fading has also been studied during the experiments and a mass transfer coefficient has been determined.
MST/474
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