Transformation-mediated and relaxation-assisted macroscopic tensile plasticity with strain-hardening in metallic glass.

ABSTRACT: Metallic glasses (MGs) possess the merits of high strength and a large elastic limit. However, they suffer from little tensile ductility in the inhomogeneous deformation regime due to strain softening and shear localization. In this work, we report a substantial increase in tensile plastic strain (ε_p) from 2.8% to 10% in a Fe-based metallic glass (MG) via non-affine thermal strain (NTS), accompanied by a significant intensity enhancement and a considerable decrease in activation energy (32%) of the β-relaxation. Notably, pronounced strain hardening is observed during tension. These extraordinary tensile properties are structurally attributed to the NTS-promoted formation of a chemical-fluctuation-mediated network structure consisting of interconnected Fe-rich medium-range orders

SUBMITTER: Hu F 

PROVIDER: S-EPMC12630613 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature