Abstract
A nanostructural mechanism of structural stability during remelting of foundry binary alloys has been developed. This mechanism is determined by the stability of the centers of crystallization of microcrystals of α‑phases and β‑phases. It is shown that this stability depends on the concentration of adsorbed hydrogen and oxygen atoms. The higher these concentrations, the less stable the centers of crystallization of α‑phase and β‑phase microcrystals in melts of foundry binary alloys, and vice versa. With an increase in overheating and (or) the holding time of melts of foundry binary alloys, the concentrations of adsorbed hydrogen and oxygen atoms in them increase. As a result, structural stability decreases during the remelting of foundry binary alloys.
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