Abstract
Quantification of free volume variation Delta Vf of hydrogenated Zr57Al10Cu15.4Ni12.6Nb5 metallic glasses ribbon was investigated through nanoindentation tests and differential scanning calorimetry (DSC). A numerical approach based on the free volume model has been used to estimate Delta Vf after 1, 2, and 5 h of Hydrogen (H) charging time. The free volume increases gradually with H-charging time and induces a softening of Zr57based metallic glasses for appropriate hydrogen content. The proposed approach may contribute to understanding the controversial effect of hydrogen addition in amorphous metallic alloys. (c) 2022 Elsevier B.V. All rights reserved.