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- W2552911680 abstract "Decomposition processes of supersaturated solid solution of aluminium alloys al- loyed with Sc and Zr have been studied in the work. Binary hypereutectic Al-Sc alloys, hyperperitectic Al-Zr alloys and triple Al-Sc-Zr alloys were chosen. Alloys were ob- tained by the melt-spinning. Melts were quenched from temperatures ofL =1000 oC and �L =1400 oC. The crystallization of anomalously supersaturated solid solution (Tquen. 1400 oC) or the crystallization with the formation of fan structure (Tquen. 1000 oC) are possi- ble. The decomposition of anomalously supersaturated solid solution is continuous, with the precipitation of nano-sized spherical Al3X (X - Sc, Zr) particles. The loss of thermal stability of Al-Sc alloys is due to the loss of coherence of the strengthening Al3Sc phase. In Al-Zr alloys the loss of strength is due to the formation of a stable tetragonal DO23- ordered A13Zr phase. After co-alloying of Al by Sc and Zr a bimodal grained structure was observed for the hypereutectic ternary alloy (Tquen. 1400oC). Nano-sized grains of 50-60 nm were present on the boundaries of 1-2 µm large-sized grains. TEM shows the formation of composite Al3Zr/Al3Sc particles. The formation of Al3Zr shell changes the nature of the interfacial fit of the particle with the matrix and slows down the decompo- sition during the coalescence." @default.
- W2552911680 created "2016-11-30" @default.
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- W2552911680 date "2011-01-01" @default.
- W2552911680 modified "2023-09-24" @default.
- W2552911680 title "FORMATION AND DECOMPOSITION OF THE ANOMALOUS SUPERSATURATED SOLID SOLUTION OF ALUMINIUM ALLOYS ALLOYED WITH Sc AND Zr" @default.
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