| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure-Property Relationships of Bulk Metallic Glasses
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| Presentation Title |
A General Framework for the Mechanical Response of Metallic Glasses during Strain-rate-dependent Uniaxial Compression |
| Author(s) |
Weiwei Jin, Amit Datye, Udo D. Schwarz, Mark D. Shattuck, Corey S. O'Hern |
| On-Site Speaker (Planned) |
Weiwei Jin |
| Abstract Scope |
Experimental data on the compressive strength σmax versus strain rate for metallic glasses undergoing uniaxial compression shows varying strain rate sensitivity. Using numerical simulations of metallic glasses undergoing uniaxial compression at finite strain rates, we show that they obey a general relation for compressive strength versus temperature. Specifically, at low strain rates, an increase in strain rate leads to higher temperatures T and lower σmax, whereas at high strain rates, increasing strain rate leads to decreases in T and increases in σmax for systems coupled to a zero-temperature heat bath in the low damping limit. Similar behavior for σmax versus T is observed for simulations of metallic glasses undergoing compressive strain rates and coupled to a finite-temperature heat bath. In this case, σmax initially increases with T at low strain rates and then exhibits similar nonmonotonic behavior for σmax versus T and σmax versus strain rate. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, Computational Materials Science & Engineering |