Structural evolution of nanoscale metallic glasses during high-pressure torsion: A molecular dynamics analysis.

ABSTRACT: Structural evolution in nanoscale Cu₅₀Zr₅₀ metallic glasses during high-pressure torsion is investigated using molecular dynamics simulations. Results show that the strong cooperation of shear transformations can be realized by high-pressure torsion in nanoscale Cu₅₀Zr₅₀ metallic glasses at room temperature. It is further shown that high-pressure torsion could prompt atoms to possess lower five-fold symmetries and higher potential energies, making them more likely to participate in shear transformations. Meanwhile, a higher torsion period leads to a greater degree of forced cooperative flow. And the pronounced forced cooperative flow at room temperature under high-pressure torsion permits the study of the shear transformation, its activation and

SUBMITTER: Feng SD 

PROVIDER: S-EPMC5098210 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature