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Soare V.,National Institute of Research and Development for Nonferrous and Rare Metals | Mitrica D.,National Institute of Research and Development for Nonferrous and Rare Metals | Badilita V.,National Institute of Research and Development for Nonferrous and Rare Metals | Constantin I.,National Institute of Research and Development for Nonferrous and Rare Metals | And 2 more authors.
Metalurgia International | Year: 2011

The paper presents experimental models for obtaining nanostructured aluminum master alloys by rapid solidification processes, such as melt-spinning. The investigated master alloys are AlSr10 and AlTi5B1. It is known that nanostructured phases in such master alloys provide improved modification or refining capabilities for subsequent aluminum alloys processing. The SEM and XRD analyses revealed microstructures of solid solution α-Al and round Al4Sr intermetallic compound, with grain sizes of 40nm to 100nm. The melt spun AlTi5B1 master alloy revealed an supersaturated solid solution and nanocrystalline Ti-xAlxB2 (52,8nm to 83,5nm) complex compound. In order to obtain the final master alloy modification or refiner product the nanostructered melt spun ribbons were compacted at low pressures in Φ30 mm briquettes.

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