Semisolid structure formation and semisolid casting
Article
Article Title | Semisolid structure formation and semisolid casting |
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ERA Journal ID | 4724 |
Article Category | Article |
Authors | |
Author | Wang, Hao |
Journal Title | Journal of Materials Science and Technology |
Journal Citation | 21 (1 (Supplement)), pp. 65-71 |
Number of Pages | 7 |
Year | 2005 |
Publisher | Elsevier |
Place of Publication | Shenyang, China |
ISSN | 1005-0302 |
Web Address (URL) | http://www.jmst.org/pcn/qikan/manage/wenzhang/05s065.pdf |
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. |
Keywords | semisolid processing; semisolid structure formation; semisolid casting; controlled nucleation |
ANZSRC Field of Research 2020 | 401607. Metals and alloy materials |
Public Notes | No evidence of copyright restrictions. |
Byline Affiliations | University of Queensland |
https://research.usq.edu.au/item/9y590/semisolid-structure-formation-and-semisolid-casting
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