The effect of the as-cast microstructure on solution treatment of AZ91D-1.5Ê was investigated. Ultrasound treatment was applied during the casted alloy’s cooling, promoting the refinement of α-Mg and β-Mg17Al12 phases. Fine and divorced β-phase was found in the ultrasound-treated sample, resulting in a superior dissolution rate of this intermetallic during subsequent solution treatment. The results indicate that tailoring the as-cast microstructure may be a route for optimizing the solution treatment necessary for downstream plastic defor- mation processes. The solution treatment’s duration and temperature may be decreased, making the process economically and ecologically sustainable.

Ultrasound-assisted casting of AZ91D-1.5% – Shifting T4 paradigm for downstream processing

D'Errico, F.;
2023-01-01

Abstract

The effect of the as-cast microstructure on solution treatment of AZ91D-1.5Ê was investigated. Ultrasound treatment was applied during the casted alloy’s cooling, promoting the refinement of α-Mg and β-Mg17Al12 phases. Fine and divorced β-phase was found in the ultrasound-treated sample, resulting in a superior dissolution rate of this intermetallic during subsequent solution treatment. The results indicate that tailoring the as-cast microstructure may be a route for optimizing the solution treatment necessary for downstream plastic defor- mation processes. The solution treatment’s duration and temperature may be decreased, making the process economically and ecologically sustainable.
2023
SEM; Magnesium alloy; Solution treatment; β-Mg17Al12; Ultrasound treatment
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1232962
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