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Article
Accessing a Broader Range of Energy States in Metallic Glasses by Variable-Amplitude Oscillatory Shear
Journal of Non-Crystalline Solids
  • Nikolai Priezjev, Wright State University
Document Type
Article
Publication Date
5-15-2021
Identifier/URL
86640699 (Orcid)
Abstract

The influence of variable-amplitude loading on the potential energy and mechanical properties of amorphous materials is investigated using molecular dynamics simulations. We study a binary mixture that is either rapidly or slowly cooled across the glass transition temperature and then subjected to a sequence of shear cycles with strain amplitudes above and below the yielding strain. It was found that well annealed glasses can be rejuvenated by small-amplitude loading if the strain amplitude is occasionally increased above the critical value. By contrast, poorly annealed glasses are relocated to progressively lower energy states when subyield cycles are alternated with large-amplitude cycles that facilitate exploration of the potential energy landscape. The analysis of nonaffine displacements revealed that in both cases, the typical size of plastically rearranged domains varies depending on the strain amplitude and number of cycles, but remains smaller than the system size, thus preserving structural integrity of amorphous samples.

DOI
10.1016/j.jnoncrysol.2021.120746
Citation Information
Nikolai Priezjev. "Accessing a Broader Range of Energy States in Metallic Glasses by Variable-Amplitude Oscillatory Shear" Journal of Non-Crystalline Solids (2021) ISSN: 0022-3093
Available at: http://works.bepress.com/nikolai-priezjev/94/