Elastocaloric effect dependency in [001]-oriented titanium nickelide single crystals, containing nanosized Ti₃Ni₄ particles | Izvestiya vuzov. Fizika. 2021. № 9. DOI: 10.17223/00213411/64/9/114

Elastocaloric effect dependency in [001]-oriented titanium nickelide single crystals, containing nanosized Ti₃Ni₄ particles

The temperature dependence of the elastocaloric effect were studied and experimental values of the adiabatic cooling Δ T _ad in loading/unloading cycles up to 13.3 K in quenched and 16.4 K in aged at 573 K, 1 h Ni_50.6Ti_49.4 single crystals were obtained. In aged crystals, a specific feature of the elastocaloric effect temperature dependence (an increase in Δ T _ad above the temperature T _R = 273 K) was found, which is associated with a change in the sequence of stress-induced martensitic transformation from R-B19' to B2-B19'. The factors (the value of the dissipated energy in the working cycle, the strain hardening coefficient during the stress-induced martensitic transformation), that affect the elastocaloric effect, are discussed. It is shown, that aged single crystals have a high coefficient of performance value up to 31, which characterizes the efficiency of converting mechanical energy into thermal energy, and are promising for solid-state cooling technologies.

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Keywords

martensitic transformations, superelasticity, elastocaloric effect, aging, single crystals

Authors

Name	Organization	E-mail
Surikov N.Yu.	Siberian Physical-Technical Institute of Tomsk State University	jet_n@mail.ru
Panchenko E.Yu.	Siberian Physical-Technical Institute of Tomsk State University	panchenko@mail.tsu.ru
Chumlyakov Yu.I.	Siberian Physical-Technical Institute of Tomsk State University	chum@phys.tsu.ru

Всего: 3

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