On the nature of the “double” yield point in Ti$_{50}$Ni$_{25}$Cu$_{25}$ alloy upon high-pressure torsion

The anomalous phenomenon of the “double” yield point attributed with the “crystal $\Rightarrow$ amorphous state” phase transition during high-pressure torsion of Ti$_{50}$Ni$_{25}$Cu$_{25}$ alloy has been analyzed experimentally and theoretically. Satisfactory correlation between experimental data and theoretical hypothesis has been found.