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Semisolid Processing of A380 Al Alloy Using Cooling Slope

Das, Prosenjit and Kumar, Manish and Samanta, Sudip K and Dutta, Pradip and Ghosh, Debashis (2014) Semisolid Processing of A380 Al Alloy Using Cooling Slope. In: MATERIALS AND MANUFACTURING PROCESSES, 29 (4). pp. 422-428.

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Official URL: http://dx.doi.org/10.1080/10426914.2013.852212

Abstract

This study is aimed toward obtaining near spherical microstructural features of Rheocast A380 aluminum alloy. Cooling slope (CS) technique has been used to generate semisolid slurry from the superheated alloy melt. Spherodization of primary grains is the heart of semisolid processing which improves mechanical properties significantly in the parts cast from semisolid state compared to the conventional casting processes. Keeping in view of the desired microstructural morphology, i.e., rosette or spherical shape of primary alpha-Al phase, successive slurry samples have been collected during melt flow and oil quenched to investigate the microstructure evolution mechanism. Conventionally cast A380 Al alloy sample shows dendritic grains surrounded by large eutectic phase whereas finer, near spherical grains have been observed within the cooling slope processed slurry and also in the solidified castings which confirms the effectiveness of semisolid processing of the alloy following cooling slope technique. Grain refiner addition into the alloy melt is found to have favorable effect which leads to the generation of finer primary grains within the slurry with higher degree of sphericity.

Item Type: Journal Article
Additional Information: copyright for this article belongs to TAYLOR & FRANCIS INC, 520 CHESTNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
Keywords: Rosette; Spheroidal; Semisolid; Primary Al; Non-dendritic; Eutectic
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 28 May 2014 05:48
Last Modified: 28 May 2014 05:48
URI: http://eprints.iisc.ac.in/id/eprint/49072

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