Abstract
In present study, the fabrication and structural characterization of nanocrystalline Al3Ti/Al13(Fe,Ni)4 intermetallic compound by means of melt spinning and subsequent annealing has been performed. For this purpose, melt spinning process was done in Al80Fe10Ti5Ni5 (at%) alloying system at different wheel speeds in the range of 20–50 m/s. To achieve the desired microstructure, the melt spun ribbons were annealed at temperatures between 300 and 600 °C. The prepared samples were characterized by X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM), differential scanning calorimetry (DSC) and nano-indentation (NI) techniques. During the melt spinning with a wheel speed of 50 m/s, a fully amorphous phase was formed in the Al80Fe10Ti5Ni5 alloying system. By annealing the produced amorphous phase, Al3Ti and Al13(Fe,Ni)4 intermetallic phases precipitated from the amorphous matrix. The fully amorphous phase has a hardness about 4.5 GPa, which increased to about 6.2 GPa after annealing process.
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