Simple correlation between mechanical and thermal properties in TE–TL (TE = Ti,Zr,Hf;TL = Ni,Cu) amorphous alloys

We provide new data for the stiffness, hardness, Debye temperatures and crystallization and glass transition temperatures for fourteen Ti–TL and Hf–TL amorphous alloys (TL = Ni,Cu) covering wide composition range (x(TL) ≤ 70). These data increase linearly with x, as was previously observed for Zr–TL glassy alloys. Thus, the strength of interatomic bonding (reflected in stiffness) in all TE–TL amorphous alloys (TE = Ti,Zr,Hf) increases with x for x ≤ 65. The actual variations of studied properties depend on TE, being feeble for TE = Ti. The approximately linear variation of mechanical, vibrational and thermal parameters with x enables one to estimate these parameters for pure amorphous TEs, but does not indicate compositions at which bulk metallic glasses (BMG) form in these alloy systems. The reduced glass transition temperature Trg is the property which roughly correlates with the formation of BMGs in glassy TE–TL alloys.