Abstract:
The cyclic stability of superelasticity and elastocaloric effect under compression deformation in initial and aged at 773 K, 1 h [001]-single crystals of Ni$_{54}$Fe$_{19}$Ga$_{27}$ alloy (at.%) was investigated. It was established that single crystals exhibit high cyclic stability of the elastocaloric effect with a stable value of $\Delta T_{ad}$ = 9.2 ($\pm$ 0.5) K (for initial) and $\Delta T_{ad}$ = 8.2 ($\pm$ 0.5) K (for aged) up to 10$^5$ load/unload cycles without sample destruction. The conditions of high stability and microstructural mechanisms of degradation of superelasticity parameters in single crystals of Ni$_{54}$Fe$_{19}$Ga$_{27}$ alloy are analyzed.
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