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Cooling Slope Casting to Obtain Thixotropic Feedstock I: Observations with a Transparent Analogue

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journal contribution
posted on 10.11.2010, 11:02 by E. Cardoso Legoretta, Helen V. Atkinson, H. Jones
New Rheocasting (the NRC process) is a recently developed semisolid processing route. There are two versions of this route. In one, molten alloy is poured directly into a tilted mould and through careful temperature control during cooling a spheroidal semisolid microstructure is achieved, before the material in the mould is upended into a shot sleeve and hence forced into a die. Alternatively, the molten alloy is poured onto a cooling slope and thence into a mould before processing. The aim of the work described in this paper, and its companion, was to develop understanding of the microstructural development during the initial stages of this process i.e. in the mould before processing and with the cooling slope/mould combination. In this first paper, an analogue system based on aqueous ammonium chloride has been used to visualise what happens when an alloy is poured into a tilted mould with a chill wall. In the companion paper, the results for pouring A356 aluminium alloy directly into a mould, and also via a cooling slope into a mould are presented.

History

Citation

Journal of Materials Science, 2008, 43 (16), pp. 5448-5455

Published in

Journal of Materials Science

Publisher

Springer Verlag

issn

0022-2461

Available date

10/11/2010

Publisher version

http://link.springer.com/article/10.1007/s10853-008-2828-2

Notes

This is the author’s final draft of the paper published as Journal of Materials Science, 2008, 43 (16), pp. 5448-5455. The final published version is available at www.springerlink.com, Doi: 10.1007/s10853-008-2828-2.

Language

en