| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond IV
|
| Presentation Title |
Stress Induced Martensite Transformation and Superelastic Effect in TiZrHfNbAl High Entropy Alloys |
| Author(s) |
Xidong Hui, Lu Wang, Yandong Wang |
| On-Site Speaker (Planned) |
Xidong Hui |
| Abstract Scope |
HEAs with BCC structure have potentials for wide applications due to their high strength, high hardness and excellent heat resistance. In this presentation, we report novel TiZrHfNbAl HEAs designed based the “d-electron alloy design” approach. These HEAs exhibit a pronounced stress induced martensitic transformation (SIMT) during tensile deformation, resulting in dual yielding phenomenon with first and second yielding stress, and a long-term work-hardening stage. Moreover, these HEAs show an outstanding superelastic effect featured by combination of the maximum total recovery strain, fully recoverable strain and the corresponding tensile strength. By in situ high energy X-ray diffraction technology, the deformation mechanism of the HEAs will be discussed according to the evolution of the lattice strains on different planes. The reversible stress-induced martensitic transformation mechanism between martensitic and parent phase in these HEAs will be also addressed. |
| Keywords |
High-Entropy Alloys, Other, |