| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
CMT-Associated Superior Mechanical Properties in Multi-Principal Element Alloys |
| Author(s) |
Yandong Wang |
| On-Site Speaker (Planned) |
Yandong Wang |
| Abstract Scope |
The confined martensitic transformation (CMT) exhibits its specific transformation crystallography, thermodynamics and kinetics, which are obviously different from that observed in traditional martensitic transformation (MT). A novel alloy design strategy was proposed recently in multi-principal element alloys (MPEAs) exhibiting CMT, to achieve non-hysteretic superelasticity, Elinvar effect and superior strength-toughening properties over a broad temperature region. The physical origin and mechanisms were revealed by the in-situ synchrotron X-ray diffraction and neutron scattering experiments. It is found that the excellent mechanical properties stem from a specific continuous distribution of ordered and disordered structures to form the nano-scale stress/strain gradient, which plays a critical role in hindering the dislocation movement and suppressing the first-order MT. The new understanding of underlaying deformation and phase transformation mechanisms in MPEAs will be outlined and some novel findings of the CMT-associated anomalies in mechanical behavior will be presented in various alloy systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, High-Entropy Alloys, Mechanical Properties |