Formation of the microstructure of rapidly solidified hypoeutectic Al-Si alloy

被引：0
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作者：
Olga Gusakova
Vasiliy Shepelevich
Dmitri V. Alexandrov
Ilya O. Starodumov
机构：
[1] International Sakharov Environmental Institute of Belarusian State University,Department of Nuclear and Radiation Safety
[2] Belarusian State University,Department of Solid State Physics
[3] Laboratory of Multi-Scale Mathematical Modeling,Department of Theoretical and Mathematical Physics
[4] Ural Federal University,undefined
来源：
The European Physical Journal Special Topics | 2020年 / 229卷
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摘要：
The authors present results on microstructure and component distribution of industrial hypoeutectic Al-Si alloy, obtained at cooling rates of 102 and 105 K/s. Bulk samples are characterized by a heterogeneous structure that represents the large dendrites of a solid solution based on aluminum, and a eutectic lamellar mixture of aluminum and silicon filling the interdendritic spacing. The rapidly solidified foils are characterized by more dispersive microstructure and chemical homogeneity; however, they have a microstructure layering in the form of a cross-section. It was established that crystallization proceeds according to the fundamentally different mechanisms: near-equilibrium crystallization for bulk samples, and chemically partitionless crystallization for rapidly solidified foils.
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页码：417 / 425
页数：8
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