Mِssbauer spectroscopic study of Al deformed at high-speed

High-speed deformation of Al–0.01at.% 57Fe at room temperature was investigated using 57Fe Mössbauer spectroscopy. High-speed deformation performed by impact of steel block on the specimen plate, inducing rapid reduction in thickness. High-speed deformation introduces numerous defects in Al–0.01at.% 57Fe, and mutual interactions between point defects and 57Fe probe atoms produce a satellite component in Mössbauer spectra. Intensity of the satellite components of Mössbauer spectra arising from 57Fe in the defect-associated state and in the precipitated second phase depends on heat-treatment performed after high-speed deformation.