Inelastic deformation of metallic glasses under dynamic cyclic loading

Dynamic mechanical analysis was performed in two metallic glasses that show markedly distinct beta relaxation features. The confined flow defects of free-volume zones and the inelastic deformation behavior result into a significant mechanical hysteresis loop in dynamic cyclic loadings, which is described with a viscoelastic model. Annealing below the glass transition temperature T-g decreases the concentration of free-volume zones. The understanding of the inelastic deformation, which is related to free-volume zones, is critical and may provide a new avenue into the mechanical properties' improvement of high entropy metallic glasses. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Automated summary

Dynamic mechanical analysis was performed on two metallic glasses with distinct beta relaxation features. The presence of free-volume zones and inelastic deformation behavior led to significant mechanical hysteresis loops in dynamic cyclic loadings, which can be described using a viscoelastic model. Annealing below the glass transition temperature reduced the concentration of free-volume zones, providing insights into improving the mechanical properties of high entropy metallic glasses.