Effect of orientation on superelasticity of Fe-33Mn-11Al-7Ni-6Cr single crystals with negative temperature dependence of stresses for the onset of transformation
Chumlyakov Yu. I.1, Kireeva I. V.1, Pobedennaya Z.V.1, Yakovleva L.P.1, Kuksgauzen I. V.1, Kuksgauzen D. A.1
1Tomsk State University, Tomsk, Russia
Email: chum@phys.tsu.ru, kireeva@spti.tsu.ru, pobedennayazina@gmail.com, irina_kuksgauzen89@mail.ru, kuksgauzen90@gmail.com
For the first time, a negative temperature dependence of the stresses of the onset martensitic transformation σMs was discovered in the temperature range of 203-(275-300) K and 325-(425-475) K in the quenched Fe-33Mn-11Al-7Ni-6Cr (at.%) alloy single crystals oriented along [111], [123] and [011] directions, under compression. In the temperature range of (425-475)-573 K, a positive dependence σMs(T) was observed. Superelasticity was found in the [011] and [123] orientations in the temperature range of 203-573 K, while it was absent in the [111] orientation. Keywords: Single crystals Fe-33Mn-11Al-7Ni-6Cr, thermoelastic martensitic transformation, superelasticity, nano-sized particles.
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