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The microstructural evolution of FeCrAl alloys under thermal treatment and particle irradiation is studied using the phase-field method. An influence of alloying elements and annealing temperature onto kinetics of precipitation at thermal treatment is discussed. By considering microstructure transformations at irradiation it is shown that depending on irradiation conditions, Cr-rich \(\alpha '\) -phase precipitation occurs through either phase decomposition or composition patterning mechanisms. Statistical analysis of precipitation kinetics is conducted by examining precipitate number density, mean precipitate size, and chromium content in the \(\alpha '\) -phase for a model alloy (Fe–30%Cr–5%Al). The findings are compared with experimental observations.

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Modeling Possible Scenarios of Nano-size Precipitates Evolution in FeCrAl Systems at Thermal Treatment and Particle Irradiation

  • 会议论文

  • 发表日期：

    2026年

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  • Dmitrii Kharchenko,
  • Vasyl Kharchenko,
  • Alina Dvornichenko,
  • Borys Lysenko

摘要

The microstructural evolution of FeCrAl alloys under thermal treatment and particle irradiation is studied using the phase-field method. An influence of alloying elements and annealing temperature onto kinetics of precipitation at thermal treatment is discussed. By considering microstructure transformations at irradiation it is shown that depending on irradiation conditions, Cr-rich \(\alpha '\) -phase precipitation occurs through either phase decomposition or composition patterning mechanisms. Statistical analysis of precipitation kinetics is conducted by examining precipitate number density, mean precipitate size, and chromium content in the \(\alpha '\) -phase for a model alloy (Fe–30%Cr–5%Al). The findings are compared with experimental observations.