Formation and Evolution of Structure and Phase Composition of Hypoeutectoid Silumin on Electron Beam Processing

Yu F. Ivanov, V. E. Gromov, D. V. Zagulyaev, S. V. Konovalov, A. P. Semin, Yu A. Rubannikova

Результат исследований: Материалы для журналаСтатья

Аннотация

Abstract—: The structural phase states and silumin’s defect substructure of silumin hypoeutectoid composition subjected to electron beam processing with the following parameters: energy density—25 J/cm2, pulse duration—150 µs, number of pulses—3, pulsed repetition rate—0.3 Hz were analyzed by methods of modern physical material science. The irradiation of the surface leads to the melting of the surface layer, the structure formation of high-speed cellular crystallization of submicron dimentions and the repeated precipitation of the second phase particles. The cells formation of two types: those free from precipitations of the second phase and those containing the lamellar eutectic Al–Si was revealed. The cells are separated by the second phase interlayers containing the particles of Cu15Si14Al4Cu9, silicon and copper. As the distance from the surface of irradiation increases the layer containing the second phase inclusions of quasi—equilibrium shape are defined along with the crystallization cells. It is indicative of the occurance of the globularization processes of silumin’s structure on electron beam processing.

Язык оригиналаАнглийский
Страницы (с-по)809-813
Число страниц5
ЖурналJournal of Surface Investigation
Том13
Номер выпуска5
DOI
СостояниеОпубликовано - 1 сен 2019

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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