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HomeMaterials Science ForumMaterials Science Forum Vols. 790-791Microstructural Evaluation during Melt Conditioned...

Microstructural Evaluation during Melt Conditioned Twin Roll Casting (MC-TRC) of Al-Mg Binary Alloys

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Abstract:

Twin-roll casting (TRC) is an established route to produce sheets of aluminium alloys. Despite enormous potential, severe centreline segregation arising during casting limits the extension of alloy range suitable for commercial applications. At given casting conditions, the centreline segregation in conventional twin-roll-cast strip increases as the solute content in the alloy (and hence freezing range) increases. To improve the quality of the TRC strips, a new technology, melt conditioning twin roll casting (MC-TRC) has been developed. Enhanced nucleation by melt conditioning favours the advance of an equiaxed solidification front during solidification. It has been demonstrated that the MC-TRC process is capable of producing high quality Al-alloy strips with minimal centreline segregation. In this paper we use binary Al-Mg as a model alloy to investigate the composition limit (the maximum Mg concentration) for the MC-TRC strip without centreline segregation.

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Periodical:

Materials Science Forum (Volumes 790-791)

Pages:

285-290

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.790-791.285

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Online since:

May 2014

Authors:

Nilam S. Barekar*, Sanjeev Das, Zhong Yun Fan, Richard Cinderey, N. Champion

Keywords:

Al-Mg Alloy, Segregation, Twin Roll Casting

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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