Amorphous Phase Formation and Heat Treating Evolution in Mechanically Alloyed Al-Ti Powders
This paper focuses on the microstructural characterization of Al25Ti75, Al37Ti63, Al50Ti50, Al63Ti37 and Al75Ti25 powders mixtures prepared by mechanical alloying (MA). The high-energy ball-milling, up to 75 h, of aluminium and titanium powders leads to a nanocrystalline or an amorphous structure. It is showed that a stable amorphous Al–Ti phase with uniform elemental distribution forms after 50 h of milling in Al50Ti50 alloy. Heat treatment of the different alloys leads to the crystallization of AlTi3, AlTi, Al2Ti and Al3Ti intermetallic compounds. A comprehensive study by laser granulometry, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimetry (DSC) was carried out on the structure, surface morphology and thermal behaviour of the MA Al-Ti mixtures, both of milled and heat treated powders.
Takashi Amemiya, Xuelin Lei and Xiong Qi Peng
P. Urban et al., "Amorphous Phase Formation and Heat Treating Evolution in Mechanically Alloyed Al-Ti Powders", Key Engineering Materials, Vol. 772, pp. 118-122, 2018