| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bulk Metallic Glasses XVIII
|
| Presentation Title |
Structural Heterogeneities Dictate Strength and Fracture Toughness in a Zr-based Metallic Glass |
| Author(s) |
Bernd Gludovatz, Lisa Krämer, Bosong Li, Anton Hohenwarter, Jamie J. Kruzic |
| On-Site Speaker (Planned) |
Bernd Gludovatz |
| Abstract Scope |
The excellent combination of properties like high strength, low stiffness, and large elastic strain limits make bulk-metallic glasses (BMGs) candidate materials for many structural applications. Major drawbacks for their use in engineering fields are highly variable fracture toughness values and limited ductilities. Here, we will show how precise heat-treatments and structural modifications through high-pressure torsion (HPT) can be used to specifically tailor the microstructure of the glass Zr52.5Cu17.9Ni14.6Al10Ti5 (Vitreloy 105). Using maps of small load Vickers hardness indents we identify soft and hard regions in the glass and correlate their distribution with the material’s stress-strain behavior in tension. We furthermore identify clearly distinguishable failure characteristics in fracture toughness tests using the as-cast, annealed and HPT-deformed samples. Our results clearly indicate the potential of thermo-mechanical processing to alter the mechanical properties of metallic glasses and provide a pathway to improved damage tolerance in these materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Other, Characterization |