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Title: In-situ synchrotron X-ray radiography observation of primary Al2Cu intermetallic growth on fragments of aluminium oxide film
Authors: Wang, F
Eskin, D
Connolley, T
Wang, C
Koe, B
King, A
Reinhard, C
Mi, J
Keywords: Solidification;Synchrotron X-ray radiography;Metals and alloys;Intermetallic phase;Structure refinement;Oxide film
Issue Date: 2017
Publisher: Elsevier
Citation: Materials Letters, 2017, 213 pp. 303 - 305
Abstract: While using synchrotron X-ray radiography for studying ultrasonic melt processing, the growth of the primary Al2Cu intermetallic phase on fragments of aluminium oxide film during solidification of a hypereutectic Al-35% Cu alloy was observed in-situ and in real time with adequate spatial and temporal resolution. This provides the first direct evidence for the nucleation of a primary phase on oxide particles during solidification of real metallic alloys. Comparison of the primary Al2Cu intermetallics grown in the melt with and without fragments of aluminium oxide film reveals considerable refinement, which demonstrates that the enhanced nucleation of a primary phase on oxide particles promotes structure refinement.
ISSN: 0167-577X
Appears in Collections:Dept of Mechanical and Aerospace Engineering Research Papers

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