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Failure of Zr50Ti16.5Cu15Ni18.5 amorphous metallic ribbon

“…The ribbon samples were loaded under uniaxial tension. The measured fracture stress was 1.53 ± 0.15 GPa which is similar to that reported in [4,5]. The stress-strain curve for Zr 50 Ti 16.5 Cu 15 Ni 18.5 at a strain rate of 2 6 10 3 .…”

Structure evolution of a zirconium-based amorphous alloy upon megaplastic strain in the bridgeman chamber

“…If we return to the sequence of phase transitions for the given zirconium alloy during heating [5], the following stages must be considered after clusterization: 1) formation of the supersaturated solid solution based on the ZrTi(Ni,Cu) triple Laves phase of MgZn 2 structural type at temperatures in the interval 686-726 K and 2) precipitation of two equilibrium phases, including the Zr 2 Cu tetragonal phase (of the MoSi 2 structure type) and the Zr 2 Ni tetragonal phase with the CuAl 2 structure type from the Laves supersaturated phase at Т = 842-905 K. In our experiment performed in the Bridgeman chamber at room temperature with n = 0.5, we observed precipitation of the Zr 2 Ni tetragonal phase and ZrTi(Ni,Cu) Laves hexagonal phase of MgZn 2 structure type (that on heating occurred in the temperature interval 842-905 K). We note that strain by stretching of the amorphous alloy with the same structure at different temperatures in [11] led to crystallization already at 648 K. In other words, the strain initiated crystallization processes in the clusterization temperature interval. Both phases revealed in our case differ by their morphology; this is well seen from Fig.…”

Influence of a Protective Coating on the Crystallization of an Amorphous Fe78Si13B9 Alloy

“…For example, a nanostructure formed upon deformation consists of smaller nanocrystals than a nanostructure formed upon heat treatment [41,42]. In different amorphous alloys, deformation can promote both acceleration [43] and suppression of crystallization [30]. Changes in the structure upon deformation also depend on the orientation of the sample.…”