|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Application of X-ray Computed Tomography for the Characterization of Graphite Morphology in Compact-graphite Iron
||Dileep Singh, Chih-pin Chuang, John Hryn, Jonathan Almer, Peter Kenesei, Richard Huff
|On-Site Speaker (Planned)
Properties (mechanical, thermal, castability) of cast irons are strongly dependent on the graphite content, distribution, and its morphology. In the present study, high-energy x-ray tomography technique was used to characterize the graphite morphology of compact graphite iron. The size, shape, spatial connectivity and structure of different graphite morphologies were examined in 3D using computer-aided image analysis. In addition, nodularity analysis was performed in 3D and the results are compared to the traditional 2D technique. It is found that the variation of nodularity within 2 mm of the sample diameter from 2D analysis can be as high as 20 and the averaged nodularity (2D) is ~ 8% lower than that from 3D analysis. The size distribution of spheroidal graphite shows a tri-modal distribution, which suggests a multi-step nucleation process during solidification.
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