Abstract
Mössbauer spectroscopy showed that mechanical activation by compressionshear in Bridgman anvils led to deformation-induced dissolution ofAl6Fe 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. TheAl6Fe and Al13Fe4 aluminides dissolved with an extraction-type stoichiometry, which was explained by aneasier release of aluminum (as compared to iron) to the aluminum matrix and theaccompanying precipitation of aluminides owing to saturation of the structure withdeformation vacancies. A unified set of metastable phases, which appeared during quickquenching and intensive plastic deformation of the Al–Fe system, pointed to a commondiffusion mechanism of the phase transformations.
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