| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Elements Alloys X: Alloy Development and Properties
|
| Presentation Title |
Effect of Valence Electron Concentration on the Mechanical Properties of Non-equiatomic Refractory Multi-principal Element Alloys |
| Author(s) |
Taohid Bin Nur Tuhser, Daryl Chrzan, Andrew Minor, Mark Asta, Thomas John Balk |
| On-Site Speaker (Planned) |
Taohid Bin Nur Tuhser |
| Abstract Scope |
The superior strength of refractory multi-principal element alloys (RMPEAs) at elevated temperature is often paired with poor room temperature ductility. The intrinsic ductility of RMPEAs can be improved by reducing the Valence Electron Concentration (VEC). In this work, we examined the effects of VEC on the mechanical properties of the VNbMoTaW system by substituting Gr VI elements (Mo,W) with Gr V (Nb,Ta).Thin films were deposited on Kapton dogbones and silicon substrates by magnetron sputtering. Nanoindentation at three different strain rates was used to determine hardness, elastic modulus, and strain rate sensitivity, while in-situ fragmentation tests revealed certain effects of the VEC on tensile properties. By controlling the residual stress, thickness, and grain size of thin films on dogbones, we were able to extract ‘intrinsic’ ductility of these configurations. Finally, bulk samples were prepared, and corresponding mechanical properties were compared with the thin film counterparts. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Thin Films and Interfaces, Mechanical Properties |