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Meeting

2026 TMS Annual Meeting & Exhibition

Symposium

Late News Poster Session

Presentation Title

J-14: A Study of Inclusions in Direct Chill Cast Aluminium Alloys Revealed by Dissolving of the Aluminium Matrix

Author(s)

Garry Lees, Sean Telford, William Griffiths, David Brown

On-Site Speaker (Planned)

Garry Lees

Abstract Scope

For demanding applications of aluminium cast components, such as battery foil and pharmaceutical blister packaging, component quality is principally determined by alloy cleanliness. Non-metallic inclusions may show as surface defects in the forms of tears and pin hole porosity, or other aesthetic sub surface anomalies. This study has characterised the morphology of inclusions within direct chill cast aluminium alloys AA1145 and AA5052 by dissolving the aluminium matrix in anhydrous n-Butanol and collecting undissolved solid phases via filtration. The technique facilitates identification of the inclusions and permits 3-dimensional morphological interpretation using SEM and EDX analysis. Results show 10-50 micron inclusions of Al- and Mg- based oxides with structural multiplicity, existing both in clusters and isolated particles. A sample of Al3TiB grain refiner rod was also dissolved and analysed for reference. The results of this study can direct aluminium producers towards the optimal solutions for melt and casting system cleanliness standards.

Proceedings Inclusion?

Undecided

Keywords

Aluminum, Other, Other

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