Electron back-scatter diffraction study of inoculation of Al
- 1 May 2001
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Letters
- Vol. 81 (5) , 321-328
- https://doi.org/10.1080/09500830110041648
Abstract
The microstructure of cast commercial-purity aluminium inoculated by addition of an Al-Ti-C grain refiner has been studied by scanning electron microscopy and electron back-scatter diffraction (EBSD). It is found that a small fraction of the TiC particles present in the melt act as nucleation centres for grains. EBSD shows that the aluminium grains have a crystallographic cube-cube orientation relationship with the particles on which they nucleate. Nucleation occurs only on the largest particles, consistent with model predictions. Despite potential thermodynamic instability, TiC particles are effective nucleating agents.Keywords
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