E.V. Morozov – Engineer, 

Kotel’nikov Institute of Raduioengineering ang Electronics of RAS (Moscow)

E-mail: evgvmorozov@gmail.com

S.U. Fedotov − Engineer, 

Kotel’nikov Institute of Raduioengineering ang Electronics of RAS (Moscow) 

E-mail: ser52@list.ru

M.S. Bybik − Engineer, 

Kotel’nikov Institute of Raduioengineering ang Electronics of RAS (Moscow) 

E-mail: bybik.m.s@gmail.com

V.V. Koledov − Dr.Sc. (Phys.-Math), Professor, 

Kotel’nikov Institute of Raduioengineering ang Electronics of RAS (Moscow)

E-mail: victor-koledov@mail.ru

Problem formulating. The article is related to the study of the possibility of using the elastocaloric effect (ECE) in alternative power engineering in the Ti2NiCu alloy lined up as a working fluid in a solid-state heat pump. 

Goal. An experimental study of the ECE in ribbons of a rapidly quenched Ti2NiCu alloy at different values of the cycle frequency of external tensile stress, as well as an estimate of the maximum specific heat conversion power based on a working fluid from a fast ribbon of quenched Ti2NiCu alloy.

Result. ECE is maximal near the temperatures of the thermoelastic martensitic phase transition of the first kind. The maximum temperature change was observed at the point corresponding to the completion of the reverse martensitic transition  T = 67.5 °С and amounted to 21 K and 6 K with a cyclic mechanical load of 300 and 100 MPa, respectively. It is shown that the value of the ECE does not depend on the frequency of external influences in the range from 0 to 50 Hz. The specific power of the rapidly quenched tape was evaluated as a converter of thermal energy at an external mechanical stress of 100 MPa, its value was 150 kW / kg, at a frequency of 50 Hz, the ECE is 6 K.

Practical meaning. Evaluation of the specific power shows a good possibility of using Ti2NiCu alloys as a working fluid in solidstate heat pumps due to the large value of the ECE, good strength indicators, as well as a relatively inexpensive cost.

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2. Min Zhou, Yushuang Li, Chen Zhang, Shapojie Li, Erfu Wu, Wei Li, Laifeng Li. The elastocaloric effect of Ni50.8Ti49.2 shape memory alloys. Journal of Physics D: Applied Physics. 2018. V. 51. № 13. P. 135303.
3. Ossmer H., Chluba C., Kauffmann-Weiss S., Quandt E., Kohl M. TiNi- based films for elastocaloric microcooling – fatigue life and device performance. APL Materials. 2016. V. 4. № 6. P. 064102.
4. Bechtold C., Chluba C., Lima de Miranda R., and Quandt E. High cyclic stability of the elastocaloric effect in sputtered TiNiCu shape memory films. Applied Physics Letters. 2012. V. 101. № 9. P. 091903. 
5. Cong D., Xiong W., Planes A., Ren Ya., Mañosa L., Cao P., Nie Zh., Sun X., Yang Zh., Hong X., Wang Ya. Colossal elastocaloric effect in ferroelastic Ni-Mn-Ti alloys. Physical Review Letters. 2019. V. 122. № 25. P. 255703.