Semisolid structure formation and semisolid casting

Wang, Hao (2005) Semisolid structure formation and semisolid casting. Journal of Materials Science and Technology, 21 (s1). pp. 65-71. ISSN 1005-0302

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Abstract

Semisolid metal forming has now been accepted as a viable technology for production of components with complex shape and high integrity. The advantages of semisolid metal forming can only be achieved when the feedstock material has a non-dendritic semisolid structure. A controlled nucleation method has been developed to produce such structures for semisolid forming. By controlling grain nucleation method and growth, fine-grained and non-dendritic microstructures that are suitable for semisolid casting can be generated. The method was applied to hypoeutectic and hypereutectic Al-Si casting alloys, Al wrought alloys and a Mg alloy. Parameters such as pouring temperature, cooling rate and grain refiner addition were controlled to achieve copious nucleation, nuclei survival and dendritic growth suppression during solidification. The influences of the controlling parameters on the formation of semisolid structure were different for each of these alloy groups. The as-cast structures were then partially remelted and isothermally held. Semisolid structures were developed and followed by semisolid casting and stepped die.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: No evidence of copyright restrictions.
Depositing User: Dr Hao Wang
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 15 May 2008 06:48
Last Modified: 02 Jul 2013 22:49
Uncontrolled Keywords: semisolid processing; semisolid structure formation; semisolid casting; controlled nucleation
Fields of Research (FOR2008): 09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
URI: http://eprints.usq.edu.au/id/eprint/3062

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