Using single crystals of a ferromagnetic alloy (Fe – 28% Ni – 17% Co – 11.5% Al – 2.5% Nb (at.%)), the effect of aging at 973 K on the evolution of thermoelastic, stress-induced γ–α′-martensitic transformations (MTs) and tension-induced superelasticity (SE) is investigated. It is shown that the maximum SE values during γ–α′ MTs, equal to 8.5%, are achieved by aging at 973 К for 1 h. With the aging time increasing to 5–7 h, the value of SE decreases down to 6%. The reasons for the dependence of the behavior of stress hysteresis Δσ and the value of reversible strain on the aging time are discussed.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 10, pp. 28–35, October, 2014.
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Chumlyakov, Y.I., Kireeva, I.V., Kuts, O.A. et al. Thermoelastic Martensitic Transformations and Superelasticity in the [001]-Oriented FeNiCoAlNb Single Crystals. Russ Phys J 57, 1328–1335 (2015). https://doi.org/10.1007/s11182-015-0385-0
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DOI: https://doi.org/10.1007/s11182-015-0385-0