| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure and Dynamics of Metallic Glasses
|
| Presentation Title |
Are metallic glasses brittle or ductile? |
| Author(s) |
Jan Schroers, Sungwoo Sohn, Ethen Lund |
| On-Site Speaker (Planned) |
Jan Schroers |
| Abstract Scope |
Crystalline metals generally exhibit ductility which is enabled by dislocation sliding. We show here that metallic glasses, which carry ductility through shear banding, exhibit ductility only in certain stress fields and such ability is an intrinsic property. Such ability manifests in the ability to form stable shear bands that carry plasticity. We measured this quantity, ∇σ_DB for a range of metallic glasses to represent the material class of metallic glasses.
If a metallic glass behaves ductile or brittle in a given application is determined by the comparison between ∇σ_DB and the applied stress field, ∇σ_app; if ∇σ_DB > ∇σ_app the metallic glass will behaves brittle, if ∇σ_DB < ∇σ_app the metallic glass will behaves ductile, and |∇σ_app |-∇σ_DB indicates how ductile.
Measured ∇σ_DB and the concept of comparing it with ∇σ_app can explain the mechanical properties of metallic glasses and their apparent contradicting brittle and ductile characteristics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, |