3D Characterization of Structure and Micro-Porosity in Two Cast Irons with Spheroidal Graphite
Formation of low density graphite phase during solidification increases the volume of semi-solid cast iron with spheroidal graphite (SGI) and resulted pressure could help eliminate shrinkage micro-porosity in casting. Therefore, micro-porosity in casting can be linked to 3D graphite nodule structure. Two experimental SGI's with different levels of shrinkage micro-porosity in castings were intentionally produced by variation in inoculation parameters which influenced graphite nodule structure. 3D-morphological characteristics of graphite nodules and micro-porosity level were determined by µCT scanning. The obtained statistical data was discussed with respect to graphite nodule solidification mode and casting soundness. The capabilities of µCT scanning in predicting micro-shrinkage in SGI casting were compared to the other traditionally used techniques.
S. N. Lekakh et al., "3D Characterization of Structure and Micro-Porosity in Two Cast Irons with Spheroidal Graphite," Materials Characterization, vol. 158, Elsevier Inc., Dec 2019.
The definitive version is available at https://doi.org/10.1016/j.matchar.2019.109991
Materials Science and Engineering
Nuclear Engineering and Radiation Science
Center for Research in Energy and Environment (CREE)
Keywords and Phrases
3D Scanning; Cast Iron; Micro-Porosity; Solidification; Spheroidal Graphite; Structure
International Standard Serial Number (ISSN)
Article - Journal
© 2019 Elsevier Inc., All rights reserved.
01 Dec 2019
Authors greatly appreciated American Foundry Society for funding this research.