| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Design of High Modulus-low Density AlTiVCr-based Alloys to Enhance Ductility |
| Author(s) |
Paul Stavroulakis, Colin L Freeman, Dhinisa Patel, Claire Utton, Russell Goodall |
| On-Site Speaker (Planned) |
Paul Stavroulakis |
| Abstract Scope |
Refractory high-entropy and multicomponent alloys generally exhibit impressive mechanical properties such as the equiatomic AlTiVCr, which possesses significant potential concerning its elastic properties and low density, surpassing even the more advanced high-modulus steels. These alloys demonstrate limited ductility, due to the ordered B2 crystal structure they form at lower temperatures. We have shown that a heat-treatment-quenching process can partially inhibit the order-disorder transformation in this equiatomic system, resulting in a dual-phase BCC(A2)-B2 microstructure. We thus apply computational methods to evaluate the phase stability and elastic properties to design a new series of AlTiVCr-based alloys which completely suppress this phase transformation and achieve reasonable ductility without compromising the specific elastic properties. We verify our results by examining the microstructural features and mechanical properties experimentally. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Phase Transformations, Mechanical Properties |