“…Moreover, the amorphous structure includes also defects denoted as free volumes as a consequence of its production. Usually these free volumes disappear after appropriate temperature treatment at low temperatures [30]. Because no annealing was done in our case prior to the mechanical straining, the free volumes are still present and enable the motion of atoms during straining, which results both in changes of chemical and topological order as in variations of atomic distances and simultaneously in the formation of new free volumes and/or vacancy-type defects.…”