| Structure evolution of amorphous alloys at heat treatment and deformation is discussed. Amorphous structure change before crystallization is considered for Al-, Ni-, Fe-, Zr-based systems. Property change with structure evolution is discussed as well. Nanocrystal formation in light metallic glasses is studied at heating and deformation. The sizes of the nanocrystals forming during plastic deformation were found to be smaller than those of the nanocrystals forming on thermal treatment. The sizes of the nanocrystals do not change (Al-Ni-Gd, Al-Y) or change only slightly (Al-Ni-La) with increasing degree of plastic deformation whilst their volume content increases and the fraction of nanocrystals in the deformed samples is larger than that in the samples subjected to thermal treatment. Using combined treatment (plastic deformation + annealing) was observed to result in intermediate nanocrystals size. |
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