1. 3D characterization of structure and micro-porosity in two cast irons with spheroidal graphite
- Author
-
Hyoung-Koo Lee, Tara Selly, James D. Schiffbauer, Semen Naumovich Lekakh, Xueliang Zhang, and Wesley Tucker
- Subjects
010302 applied physics ,Nodule (geology) ,Materials science ,Mechanical Engineering ,02 engineering and technology ,engineering.material ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Casting ,Characterization (materials science) ,Mechanics of Materials ,Phase (matter) ,0103 physical sciences ,Micro porosity ,engineering ,General Materials Science ,Cast iron ,Graphite ,Composite material ,0210 nano-technology ,Shrinkage - Abstract
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.
- Published
- 2019