Formation of the microstructure of rapidly solidified hypoeutectic Al-Si alloy
| Autor: | O. V. Gusakova, Dmitri V. Alexandrov, VG Shepelevich, Ilya Starodumov |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Silicon Metallurgy Alloy General Physics and Astronomy chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences law.invention chemistry law Aluminium 0103 physical sciences engineering General Materials Science Lamellar structure Physical and Theoretical Chemistry Crystallization 0210 nano-technology Solid solution Eutectic system |
| Zdroj: | The European Physical Journal Special Topics. 229:417-425 |
| ISSN: | 1951-6401 1951-6355 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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