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Non-equilibrium microstructure of hyper-eutectic Al-Si alloy solidified under superhigh pressure

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Abstract

The non-equilibrium microstructures of hyper-eutectic Al-26.6wt%Si solidified under superhigh pressure (5.5 GPa) have been investigated. The results show that there exists a great deal of primary α phase in hyper-eutectic Al-Si alloy. The non-equilibrium microstructure for hyper-eutectic Al-Si alloy is composed of primary α phase, β phase and (α + β) eutectic phase. The solid solubility of Si in α phase and the solid solubility of Al in β phase increase significantly. The effects of high pressure on the solidification structures of Al-Si alloy are discussed.

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Yu, X.F., Zhang, G.Z., Wang, X.Y. et al. Non-equilibrium microstructure of hyper-eutectic Al-Si alloy solidified under superhigh pressure. Journal of Materials Science 34, 4149–4152 (1999). https://doi.org/10.1023/A:1004665728963

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