In situ resistometric investigation of phase transformations in rapidly solidified Al-based alloys containing dispersed nanoscale particles

Structural studies and resistometric measurements have been correlated to investigate the microstructural evolution during annealing in a quasicrystal (QC) forming Al-based alloy, Al93Fe3Cr2Ti2 (at.%), containing nanoscale dispersed icosahedral particles in an fcc α-Al matrix. Isothermal and anisothermal resistometric runs have been carried out on as-quenched planar flow cast ribbons. Resistivity measurements have been shown to be a very sensitive method for comparing the quenched-in structures and the relative stability of the quasicrystalline phase as a function of the processing parameters, particularly with respect to the ordering kinetics and phase transformations.