Magnesium thixotropic structure produced by controlled nucleation method

Wang, Hao and Ning, Zhiliang (2007) Magnesium thixotropic structure produced by controlled nucleation method. Tezhong Zhuzao Ji Youse Hejin (Special Casting and Nonferrous Alloys) (Sp. Is). pp. 316-319. ISSN 1001-2249

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Abstract

[Abstract]: Controlled Nucleation Method (CNM) is applied to AZ91 magnesium alloy to produce thixotropic structure suitable for semisolid casting. Pouring temperature and cooling rate are the two important solidification conditions that can be used for microstructure control in CNM process. Both have a significant effect on the as-cast microstructure and therefore on semisolid microstructure. Low pouring temperature produces fine non-dendritic as-cast structure. After partial remelting and isothermal holding, it develops into a thixotropic structure. High pouring temperature leads to a coarse dendritic as-cast structure, which turns into an irregular solid network in semisolid state. High pouring temperature can combine with high cooling rate to achieve a thixotropic structure.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Unable to locate Publisher contact details. Pre-print version of article, as made available here, differs in title from the Published version. Pre-print title: Semisolid magnesium feedstock produced by controlled nucleation method.
Depositing User: Dr Hao Wang
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 07 Apr 2008 03:00
Last Modified: 02 Jul 2013 23:00
Uncontrolled Keywords: semisolid processing, solidification, semisolid feedstock, magnesium alloy, controlled nucleation method
Fields of Research (FOR2008): 09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
09 Engineering > 0910 Manufacturing Engineering > 091006 Manufacturing Processes and Technologies (excl. Textiles)
URI: http://eprints.usq.edu.au/id/eprint/4046

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