|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Applications of Solidification Fundamentals
||Spheroidal Graphite Growth Studied by Synchrotron X-ray Tomography
||Mathias Karsten Bjerre, Mohammed Azeem, Niels Tiedje, Jesper Hattel, Peter Lee
|On-Site Speaker (Planned)
||Mathias Karsten Bjerre
Spheroidal graphite iron is a widely used cast material which combines strength with low price and good castability. The material properties are closely linked to the presence of spherical graphite particles which form during the solidification process. Thus, a precise description of nucleation and growth of the graphite particles is important in order to properly understand and predict the final mechanical properties of the cast component.
We present the first in-situ observations from solidification of cast iron resolved in three spatial dimensions and time by synchrotron x-ray tomography. The cylindrical sample of near-eutectic SGI solidified at a constant cooling rate of 0.03 C/s. The slow cooling rate allows us to resolve the growth of spheroidal graphite particles which provides basis for quantification of nucleation and direct comparison and validation of models of graphite growth. Sectioning of the sample confirmed the nature of the observed particles.
||Planned: Supplemental Proceedings volume