| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification Science VIII
|
| Presentation Title |
Synchrotron Examination of Nucleation and Growth of Nodular and Compacted Graphite Particles during Cyclic Solidification of Ductile Cast Iron |
| Author(s) |
Chaoling Xu, Tim Wigger, Mohammed Azeem, Tito Andriollo, Samuel Clark, Robert Atwood, Jesper Hattel, Peter Lee, Niels Tiedje |
| On-Site Speaker (Planned) |
Chaoling Xu |
| Abstract Scope |
It is well acknowledged that the morphology of graphite particles in cast iron strongly affect its mechanical and physical properties. In-situ synchrotron X-ray tomography was employed to directly capture the evolution of branches and formation of coral-like particles during repetitive melting and solidification of ductile cast iron. The results show that the graphite particles initially form adjacent to austenite mainly as spheres. Subsequently branches develop and coarsen towards regions with high carbon concentration, interconnecting and constituting particles with large sizes and low sphericity. Three types of particle morphologies are identified: (1) nodules with and without polyps, (2) combination of several nodules or nodules attached to a plate, and (3) a coral like structure. Changes in the morphology are correlated to the global chemical composition and local carbon concentration. The present study makes a vital contribution to explaining and predicting the microstructures and properties of ductile and compact cast iron. |
| Proceedings Inclusion? |
Planned: |