About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Structure-Property Relationships of Bulk Metallic Glasses
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Presentation Title |
Size-effects in Deformation of Rejuvenated and Annealed Metallic Glass |
Author(s) |
Akib Jabed, Golden Kumar |
On-Site Speaker (Planned) |
Golden Kumar |
Abstract Scope |
Tensile deformation of FIB-free metallic glass samples with different structural states is investigated. Pt-based metallic glass samples with diameters ranging from sub-100 nm to 100 µm are subjected to cryogenic cycling and annealing above glass transition temperature 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, rejuvenated, and annealed samples. The results are discussed in the context of shear band nucleation and propagation models. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Shaping and Forming, Other |