The Studies Of Mechanical Alloying Of Aluminium Alloys

Magnesium - aluminum alloys have been extensive applied in the aviation and the automobile industries due to their good properties, such as low density, high strength-to-weight ratio and good electrical conductivity etc. Fe-Al intermetallic compounds is one of attractive candidate for high temperature structural materials, because it exhibits the superior performances such as high strength, good oxidation resistance and low-cost. However, it has some inferior properties to be conquered for commercial applications, such as their poor toughness at room temperature (RT) and limited workability. Zirconium alloys, which have the strong glass formation ability, can be produced a series of excellent mechanics performances amorphous alloying, so the different amounts of zirconium powder have been added to iron and aluminium mixture powder in order to produce amorphous alloys. We hope that this can improve Fe-Al alloys' toughness.The process of mechanical alloying of elemental powder mixtures of Al -Mg, Al-Fe and Fe-Al-Zr have studied by means of XRD, DTA and TEM in this paper. The results indicated that Mg_0.9Al_0.1 and Mg_0.6Al_0.4 both produced Y phase (Mg₁₇Al₁₂) after milling. No compounds emerged in the process of mechanical alloying of Mg_0.4Al_0.6 and Mg_0.2Al_0.8. Corresponding intermetallic compounds have been obtained by mechanical alloying of binary alloys Fe_1-x Al_x(x=50, 75). The addition of different amount of α -Zr to a mixture of Fe_1-x Al_x(x=50, 75) result in amorphization transformation.