Controlled nucleation method: a new process for semisolid metal forming

Wang, Hao (2005) Controlled nucleation method: a new process for semisolid metal forming. Special Casting and Non-ferrous Alloys (Tezhong Zhuzao Ji Youse Hejin) . pp. 195-200. ISSN 1001-2249

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Abstract

Semisolid metal forming requires special feedstock material with a fine-grained and globular structure to achieve thixotropic properties. A number of methods have been developed to produce such feedstock materials. Controlled Nucleation Method (CNM) is a new and simple, cost effective method that has been developed by the University of Queensland. The CNM process does not use the conventional stirring process, instead, it uses solidification conditions to control nucleation, nuclei survival and grain growth, thereby produce fine and globular structures suitable for semisolid forming. No specialised equipment is required. The method can produce both semisolid slurry for rheocasting and semisolid billet for thixocasting. It can be applied to a wide range of alloys and can easily be incorporated into existing metal forming installation. Semisolid slurries / billets of hypoeutectic and hypereutectic aluminium-silicon casting alloys, aluminium wrought alloys and a magnesium alloys have been successfully produced.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 11 Aug 2014 03:01
Last Modified: 11 Aug 2014 03:01
Uncontrolled Keywords: semisolid processing; solidification; semisolid feedstock; alloy microstructure; metal forming; semisolid forming; semisolid slurry; magnesium alloys; wrought alloys; casting alloys; grain growth
Fields of Research : 09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091401 Electrometallurgy
09 Engineering > 0910 Manufacturing Engineering > 091006 Manufacturing Processes and Technologies (excl. Textiles)
09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
URI: http://eprints.usq.edu.au/id/eprint/8015

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