Stability of an Amorphous TiCuNi Alloy Subjected to High‐Pressure Torsion at Different Temperatures

The amorphous melt‐spun (MS) Ti₅₀Ni₂₅Cu₂₅ alloy is subjected to high‐pressure torsion (HPT) at temperatures of 20‐150 °C. The bright‐field (BF) TEM images of the alloy change as a result of HPT processing, the view of the bright‐field image depends on the temperature of HPT processing. HPT processing leads to a decrease in the energy of structural relaxation during heating up to 400 °C, in comparison with the initial MS ribbons. The temperature of crystallization of the MS Ti₅₀Ni₂₅Cu₂₅ alloy decreases after HPT processing by 40–20 °C (depends on the temperature of HPT processing). In the MS Ti₅₀Ni₂₅Cu₂₅ alloy, HPT processing and subsequent annealing produces noticeably finer grains than annealing at 450 °C of the initial MS alloy. Consequently, HPT processing alters the crystallization kinetics of the MS Ti₅₀Ni₂₅Cu₂₅ alloy.