About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Structure and Dynamics of Metallic Glasses
|
Presentation Title |
Structural rejuvenation and strain-hardening in nanoscale metallic glasses |
Author(s) |
Golden Kumar |
On-Site Speaker (Planned) |
Golden Kumar |
Abstract Scope |
Metallic glass samples with diameters ranging from sub-100 nm to 100 µm were subjected to cryogenic cycling, mechanical rejuvenation, and annealing before tensile loading at room temperature. Shear-localized failure with no ductility is observed in large samples whereas the smaller diameter specimens show ductile necking irrespective of the structural state of metallic glass. With decreasing sample diameter, the fracture surface changes from vein pattern to featureless in the shear-localized samples and the ductility increases in the necked samples. Despite similar size-dependent trends, the changes in deformation mode and fracture morphology occur at different diameters in as-cast, cycled, deformed, and annealed samples. The role of structure and sample size in preventing catastrophic failure and strain-hardening in metallic glasses will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Other, |