Preparation of nanocrystalline Al3Ti/Al13(Fe,Ni)4intermetallic compound by means of melt spinning and subsequent annealing

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[1] Tavoosi, Majid

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| 1600年 / Elsevier Ltd卷 / 688期

关键词：

Aluminum alloys - Binary alloys - Intermetallics - Melt spinning - Wheels - Scanning electron microscopy - Ternary alloys - Titanium alloys - Differential scanning calorimetry - High resolution transmission electron microscopy - Nanocrystals - Iron alloys - Nickel compounds - Annealing - X ray diffraction;

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摘要：

In present study, the fabrication and structural characterization of nanocrystalline Al3Ti/Al13(Fe,Ni)4intermetallic 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 Al80Fe10Ti5Ni5alloying system. By annealing the produced amorphous phase, Al3Ti and Al13(Fe,Ni)4intermetallic 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. © 2016 Elsevier B.V.

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