Superelastic behavior of [001]-oriented single crystals of the nonequiatomic high-entropy Fe–28Ni–17Co–11.5Al–2.5Ta alloy with nanosized γ'-phase particles
Reversible strain during γ-α' martensitic transformation (MT) in nonequiatomic high-entropy Fe-28Ni-17Co-11.5Al-2.5Ta (at.%) crystals oriented along the [001] direction under tension was studied for the first time. Large reversible strain εrev = 10.5% is observed for γ'-phase particle size d = 3-5 nm and decreases to 5.8% for d = 7-9 nm. It was established that εrev = 10.5% exceeds the theoretical value of the transformation lattice strain εtr = 7.76%. The physical reason for εrev>εtr is associated with the development of the reversible γ-α' MT and elastic <011>{110} mechanical twinning in α'-martensite.
Keywords
γ-α' thermoelastic martensitic transformation, reversible strain, single crystals, nanosized γ'-phase particlesAuthors
| Name | Organization | |
| Chumlyakov Yuri I. | Tomsk State University | chum@phys.tsu.ru |
| Kuksgauzen Irina V. | Tomsk State University | irina_kuksgauzen89@mail.ru |
| Kuksgauzen Dmitry A. | Tomsk State University | kuksgauzen90@gmail.com |
| Petrakov Vladislav A. | Tomsk State University | petrakov-vladislav99@yandex.ru |
| Kireeva Irina V. | Tomsk State University | kireeva@spti.tsu.ru |
| Kirillov Vladimir A. | Tomsk State University | kirillovtomsk@yandex.ru |
References
Superelastic behavior of [001]-oriented single crystals of the nonequiatomic high-entropy Fe–28Ni–17Co–11.5Al–2.5Ta alloy with nanosized γ'-phase particles | Izvestiya vuzov. Fizika. 2026. № 1. DOI: 10.17223/00213411/69/1/10