Abstract

The elastocaloric effect (ECE) is studied in samples of rapidly quenched ribbons of a Ti₂NiCu alloy at a periodic action by a mechanical stress to 300 MPa at a frequency to 50 Hz. ECE is maximal near the temperatures of a first-order thermoelastic martensitic phase transition. The ECE maximum is observed in a point corresponding to the completion of the reverse martensitic transition (T = 67.5°C) and is 21 and 6 K at cyclic mechanical loads of 300 and 100 MPa, respectively. The ECE value is shown to be independent of the frequency of the external loads in the range from 0 to 50 Hz. The specific power of a rapidly quenched ribbon as a thermal energy transformer is estimated at the external mechanical stress of 100 MPa; its value is 150 W/g at a frequency of 50 Hz and ECE is 6 K.

中文翻译：

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快速淬火的Ti 2 NiCu合金在频率至50 Hz的拉伸力的周期性作用下的弹性热效应

摘要

弹性热效应（ECE）在快速淬火的Ti ₂ NiCu合金带样品中进行研究，该带在周期性作用下通过机械应力达到300 MPa，频率为50 Hz。在一阶热弹性马氏体相变的温度附近，ECE最大值。在对应于马氏体反向转变完成的点（T = 67.5°C）观察到ECE最大值，并且在300和100 MPa的循环机械载荷下分别为21 K和6K。ECE值显示为与0到50 Hz范围内的外部负载频率无关。快速淬火带材作为热能转换器的比功率是在100 MPa的外部机械应力下估算的；在50 Hz频率下其值为150 W / g，ECE为6K。