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Mössbauer spectroscopy showed that mechanical activation by compression shear in Bridgman anvils led to deformation-induced dissolution of Al6Fe and Al13Fe4 aluminides and iron in the aluminum matrix, which was followed by formation of an Al–Fe solid solution, Al9Fe2 and Al5Fe2 aluminides, and their defective modifications. The Al6Fe and Al13Fe4 aluminides dissolved with an extraction-type stoichiometry, which was explained by an easier release of aluminum (as compared to iron) to the aluminum matrix and the accompanying precipitation of aluminides owing to saturation of the structure with deformation vacancies. A unified set of metastable phases, which appeared during quick quenching and intensive plastic deformation of the Al–Fe system, pointed to a common diffusion mechanism of the phase transformations.

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