High-temperature thermoelastic martensitic transformations in Ni44Fe19Ga27Co10 single crystals

Timofeeva, E.E., Panchenko, E.Y., Zherdeva, M.V., (...), Volochaev, M.N., Chumlyakov, Y.I.// Materials Letters//

https://doi.org/10.1016/j.matlet.2024.137744

For the first time Ni₄₄Fe₁₉Ga₂₇Co₁₀ single crystals with high-temperature martensitic transformation (M_s = 336 K) and high-temperature superelasticity (373–548 K) under tension and compression were obtained after annealing at 1448 K for 6 h, followed by fast quenching in ice-cold salt water. The increase in temperature is associated with the precipitation of the large γ-particles and the substantial decrease in the precipitation of the nanosized ω-phase, which was observed in the single crystals after annealing at 1448 K for 1 h with slower water quenching.