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Influence of semi-solid metal processing and artificial aging on microstructure and hardness of the AlSi9Cu3(Fe)

In order to achieve a uniform, non-dendritic microstructure with less porosity, semi-solid metal processing has been widely used in aluminum production as an alternative to conventional casting methods. In order to successfully perform semi-solid metal processing suitable globular microstructure must be obtained at required semi-solid temperature. In this paper, as cast dendritic structure was severely deformed with equal channel angular pressing and after reheating on suitable semi-solid temperature fine globular microstructure was formed. Influence of holding times at selected semi-solid temperature on globule formation was investigated. Hardness of the obtained microstructure after artificial aging was determined.

semi-solid metal processing ; heat treatment ; ECAP ; microstructure ; hardness

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