Abstract
In this paper, real-time, direct observation of the nucleation of primary Al2Cu phases on entrained oxide films during the solidification of an Al-35%Cu alloy, and the change of growth mode from planner to dendritic type structure of Al3Ni phases in an Al-15%Ni alloy under a pulse magnetic field are presented and discussed. Real-time synchrotron X-ray radiography provides clear and unambiguous evidence to confirm that the entrained oxide films can indeed directly nucleate primary Al2Cu intermetallic phases . Combining radiography and tomography together, the critical conditions of changing growth mode from a planner to dendritic type for the Al3Ni phases were also clearly revealed. The research demonstrates that synchrotron X-ray-based real-time characterisation techniques are the indispensable tools for quantitative solidification research.
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Acknowledgements
The author would like to acknowledge the financial support from the UK Engineering and Physical Science Research Council (EPSRC) for the Ultra-Cast project [Grants Nos. EP/L019965/1, EP/L019884/1, EP/L019825/1]. The awards of synchrotron X-ray beam time by Synchrotron SOLEIL, France [Proposal No. 20160076], and Diamond Light Source (MT13488-1, MT13488-2), UK, are also gratefully acknowledged.
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Mi, J. (2019). Synchrotron X-Ray Real-Time Studies of the Nucleation and Growth of Intermetallic Phases in Solidification. In: Tiryakioğlu, M., Griffiths, W., Jolly, M. (eds) Shape Casting. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-06034-3_6
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DOI: https://doi.org/10.1007/978-3-030-06034-3_6
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