| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bulk Metallic Glasses XVIII
|
| Presentation Title |
Competing Effects of Topology and Chemical Bonding on Mechanical Properties of Metallic Glasses |
| Author(s) |
Vrishank Jambur, Chaiyapat Tangpatjaroen, Jianqi Xi, Meng Gao, John Perepezko, Izabela Szlufarska |
| On-Site Speaker (Planned) |
Vrishank Jambur |
| Abstract Scope |
While minor alloying is used extensively to manipulate mechanical properties of metallic glasses (MGs), a mechanistic understanding of this effect is still lacking. Presently, minor alloying effects on mechanical properties are explained in terms of the effect of the alloying elements on the packing efficiency of atoms and topological order without much emphasis on the effect of chemical interactions between the atoms. Using nanoindentation experiments and atomistic simulations, we demonstrate that minor alloying Al-Sm MGs with transition metals can increase their mechanical strength by changing the strength of chemical bonds alone. We show that this strengthening is distinct from changes in topological order and in fact it can occur despite the fact that the alloying element decreases topological order. This finding demonstrates that the effects of topology and chemistry on mechanical properties of MGs can compete with each other and that they should be understood as separate, sometimes competing mechanisms. |
| Proceedings Inclusion? |
Planned: |