Pisma v Zhurnal Tekhnicheskoi Fiziki, 2025 Volume 51, Issue 1,Pages 12–15(Mi pjtf7163)
Effect of orientation on superelasticity of Fe–33Mn–11Al–7Ni–6Cr single crystals with negative temperature dependence of stresses for the onset of transformation
Abstract:
For the first time, a negative temperature dependence of the stresses of the onset of the bcc-fcc martensitic transformation $(\sigma_{Ms}$) was discovered in the temperature range of 203–300 K and 325–(425–475) K in the quenched Fe–33Mn–11Al–7Ni–6Cr (at.%) alloy single crystals oriented along [$\bar1$11], [$\bar1$23] and [011] directions, under compression. In the temperature range of (425–475)–573 K, a positive dependence $(\sigma_{Ms}(T))$ was observed. Superelasticity was found in the [011] and [$\bar1$23] orientations in the temperature range of 203–573 K, while it was absent in the [$\bar1$11] orientation.
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