Glass-forming ability of novel multicomponent (Ti33Zr33Hf33)–(Ni50Cu50)–Al alloys developed by equiatomic substitution

New multicomponent alloys have been manufactured by the equiatomic substitution method in order to investigate their glass-forming ability. (Ti33Zr33Hf33)100−x−y(Ni50Cu50)xAly alloys, where x=20–70 at.% and y=10–30 at.% have been manufactured, and investigated by differential scanning calorimetry, differential thermal analysis and X-ray diffractometry. The best glass-forming alloys are (Ti33Zr33Hf33)60(Ni50Cu50)20Al20 and (Ti33Zr33Hf33)63.4(Ni50Cu50)23.3Al13.3, showing the large reduced glass transition temperature, Trg=0.525 and 0.571, respectively. After crystallisation at 700 °C, these two alloys transform to a binary mixture of hcp MgZn2-type and fcc Ti2Ni-type phases.