The high entropy alloy concept offers unique opportunities for the design of advanced materials with unprecedented properties. However, hitherto most of the research efforts are focused on structural materials. Here, by employing the core effect of severe lattice distortion in high entropy alloys, a novel functional NiCuTiHf_0.6Zr_0.4 high entropy alloy exhibiting intriguing wide-temperature-range perfect superelasticity in a broad temperature range from 263 to 463 K and giant elastocaloric effect with the maximum adiabatic temperature change of 9.3 K is developed. This work opens the door for designing high-performance superelastic and elastocaloric functional materials with the high entropy alloy concept.

高熵合金的概念为设计具有空前性能的先进材料提供了独特的机会。但是，迄今为止，大多数研究工作都集中在结构材料上。在这里，通过利用高熵合金中严重的晶格畸变的核心效应，新型功能性NiCuTiHf _0.6 Zr _0.4高熵合金在263至463 K的宽温度范围内表现出令人着迷的宽温度范围完美超弹性，并具有巨大的弹性热效应。最大绝热温度变化为9.3K。这项工作为设计具有高熵合金概念的高性能超弹性和弹性功能材料打开了大门。