Grain structure of Al – Si alloy at high-speed solidification. Taylor factor

Authors

  • Olga V. Gusakova International Sakharov Environmental Institute, Belarusian State University, 23/1 Dawgabrodskaja Street, Minsk 220070, Belarus
  • Vasily G. Shepelevich Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

Keywords:

Al – Si alloy, high-speed solidification, microstructure, grain structure, deformation, Taylor factor

Abstract

The grain structure of the foil of АK12оch alloy (Al – 12.3 wt. % Si – 0.2 wt. % Fe) is studied. The foil was produced by ultrafast quenching method from the melt at a cooling rate of 105 K/s. It exhibits a layered microstructure, which is due to changes in the thermodynamic conditions at the solid – melt phase during solidification. The grain structure of the aluminium phase in the foil layers was examined using backscattered electron diffraction. It was found that the average grain size in the foil layers is 3.5 and 4.6 μm. It was determined that in the foil layer adjacent to the crystallizer surface, the grain size distribution is bimodal. An explanation for the formation of foil areas with large (over 10 μm) and small (under 5 μm) grains is provided. It was established that in the foil layer adjacent to the crystalliser surface, deformation of large grains occurs due to tensile stress caused by the movement of the upper layers of the melt. The rotation of the grain’s crystal lattice is described using the Taylor model. Numerical values of the Taylor factor are given.

Author Biographies

  • Olga V. Gusakova, International Sakharov Environmental Institute, Belarusian State University, 23/1 Dawgabrodskaja Street, Minsk 220070, Belarus

    PhD (physics and mathematics), docent; associate professor at the department of nuclear and medical technologies, faculty of environmental monitoring

  • Vasily G. Shepelevich, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

    doctor of science (physics and mathematics), full professor; professor at the department of solid state physics and nanotechnologies, faculty of physics

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Published

2026-01-14

Issue

No. 3 (2025): Journal of the Belarusian State University. Physics

Section

Condensed State Physics

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How to Cite

(1)
Gusakova, O. V.; Shepelevich, V. G. Grain Structure of Al – Si Alloy at High-Speed Solidification. Taylor Factor. Журнал Белорусского государственного университета. Физика 2026, No. 3, 24-32. https://doi.org/10.33581/2520-2243-2025-3-%p.
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