МИКРОСТРУКТУРА И МЕХАНИЧЕСКИЕ СВОЙСТВА СПЛАВА СИСТЕМЫ AL–MG–FE–NI–ZR–SC ПОСЛЕ ВСЕСТОРОННЕЙ ИЗОТЕРМИЧЕСКОЙ КОВКИ

Физика металлов и металловедение. 2023. Т. 124. № 6. С. 540–549.

Кищик А. А., Aksenov S. A., Кищик М. С., Demin D., Чурюмов А. Ю., Михайловская А. В.

The effects of isothermal multidirectional forging (IMF) on the grain structure, second-phase par-
ticles of solidification origin, and dispersoids in the Al–4.9Mg–0.9Ni–0.9Fe–0.2Zr–0.1Sc alloy have been
investigated. The strain distribution over the sample volume during forging in a closed die has been analyzed
using a finite-element simulation. A method of considering the friction effect and changes in strain rate when
constructing stress–strain curves based on the IMF results has been proposed. Increasing the number of phase
cycles at 350 ° C has resulted in a two-fold decrease in the average phase particle size of solidification origin and
the formation of a structure with an average grain size of 1.3 ± 0.2  μ m, but did not change the parameters of
dispersoids. IMF increased the yield strength of the alloy by 60% and the tensile strength by 20%.

Keywords: Mechanical properties, алюминиевые сплавы, метод конечных элементов (МКЭ), механические свойства материалов, Grain structure, Зеренная структура, finite element analysis, Aluminium alloy, всесторонняя изотермическая ковка, isothermal multidirectional forging