Microstructure and rheological properties of a semisolid A356 alloy with erbium addition
Journal article
Authors/Editors
Strategic Research Themes
Publication Details
Author list: Peeratatsuwan C., Pandee P., Patakham U., Limmaneevichitr C.
Publisher: Elsevier
Publication year: 2022
Volume number: 40
Issue number: 7
Start page: 1148
End page: 1155
Number of pages: 8
ISSN: 1002-0721
Languages: English-Great Britain (EN-GB)
View in Web of Science | View on publisher site | View citing articles in Web of Science
Abstract
The effects of erbium addition on the rheological properties and microstructure of a semisolid A356 alloy were studied. The semisolid slurries were prepared through the serpentine channel technique before they were thixoformed using parallel-plate compression with cylindrical discs. The grain and globule size decreases as the Er content increases, resulting in an improved and uniform distribution of spherical primary α-Al phase within the semisolid slurry. The addition of the Er modifies the grain morphology and size of the α-Al grains, resulting in a better and more uniform distribution of spherical primary α-Al phase within the semisolid slurry. As a result, rheocast quality index increases with the addition of Er, which is suitable for the thixoforming process. The A356 alloy without Er has the highest viscosity herein. The viscosity decreases, and the flow characteristics of the semisolid feedstock are expected to improve when Er is added as a result of the refinement of primary α-Al and modification of eutectic silicon. Furthermore, the refined semisolid A356 alloys with Er show a slightly larger fraction of high-angle grain boundaries compared to that for the unrefined alloy. © 2021 Chinese Society of Rare Earths
Keywords
Aluminum alloy
Contact Information