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In-situ synchrotron X-ray radiography observation of primary Al 2 Cu intermetallic growth on fragments of aluminium oxide film

DOI: 10.1016/j.matlet.2017.11.090 DOI Help

Authors: Feng Wang (Brunel University London) , Dmitry Eskin (Brunel University London) , Thomas Connolley (Diamond Light Source) , Chuangnan Wang (University of Hull) , Billy Koe (University of Hull) , Andrew King (Synchrotron SOLEIL) , Christina Reinhard (Diamond Light Source) , Jiawei Mi (University of Hull)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Materials Letters , VOL 213 , PAGES 303 - 305

State: Published (Approved)
Published: November 2017

Open Access Open Access

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.

Journal Keywords: Solidification; Synchrotron X-ray radiography; Metals and alloys; Intermetallic phase; Structure refinement; Oxide Film

Subject Areas: Materials, Engineering

Facility: Soleil