Semisolid microstructural evolution of AlSi7Mg during partial remelting
Article
Article Title | Semisolid microstructural evolution of AlSi7Mg during partial remelting |
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ERA Journal ID | 4973 |
Article Category | Article |
Authors | Wang, Hao (Author), Davidson, C. J. (Author) and StJohn, David H. (Author) |
Journal Title | Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing |
Journal Citation | 368 (1-2), pp. 159-167 |
Number of Pages | 9 |
Year | 2004 |
Place of Publication | Lausanne, Switzerland |
ISSN | 0921-5093 |
1873-4936 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.msea.2003.10.305 |
Abstract | Different as-cast microstructures of an AlSi7Mg alloy were produced by controlling the solidification conditions. The as-cast grain size ranged from 1.4 mm to 160 μm and the morphology varied from dendritic to rosette-like to globular. The as-cast materials were then partially remelted and isothermally held at 580 °C for microstructure evolution. The final microstructure depended on the initial as-cast microstructure and the isothermal holding time. After partial remelting and isothermal holding, coarse-grained dendritic structures were not able to evolve to a globular structure, while structures with medium sized dendritic grains evolved to a globular structure with a relatively large particle size after a long isothermal holding time. Fine-grained structures evolved to well-rounded globular grains within times ranging from 10 min to 5 min as the dendritic nature of the starting structure diminished. An empirical equation has been established to describe the relationship between the evolved microstructure and the as-cast microstructure. |
Keywords | semisolid, microstructural evolution, thixotropic feedstock, AlSi7Mgn, alloy |
ANZSRC Field of Research 2020 | 340305. Physical properties of materials |
401607. Metals and alloy materials | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | University of Queensland |
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia |
https://research.usq.edu.au/item/9y593/semisolid-microstructural-evolution-of-alsi7mg-during-partial-remelting
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