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Outline
Developing shape memory alloys with well-balanced comprehensive elastocaloric performance is essential for advancing solid-state refrigeration technologies. Given the excellent mechanical properties and superelasticity of TiZrMoSn alloys， their crystal structure， martensitic transformation， superelasticity， and elastocaloric effect are systematically investigated. By introducing a textured， coarse-grained microstructure to enhance the elastocaloric response and reduce stress hysteresis， alongside a Mo-alloying strategy to tune the stability of austenite and optimize phase transformation reversibility and critical stress， a TiZrMoSn alloy with superior comprehensive performance is successfully developed. The results show that the Ti76Zr18Mo3Sn3 alloy exhibits a dual-state grain structure （columnar and equiaxed grains） with a dominant 〈001〉A texture. Under a strain of 4.5%， the alloy reaches a maximum superelastic stress of 700 MPa， a critical transformation stress of 211 MPa， and a stress hysteresis of about 100 MPa， demonstrating high-stress superelasticity with low energy dissipation. At room temperature， the alloy exhibits a peak adiabatic temperature change （ΔTad） of -7 K， approaching the highest values reported for Ti-based alloys. After 103 elastocaloric cycles， ΔTad only decays by 8%， showing excellent cycling stability. Moreover， the alloy exhibits a wide theoretical working temperature window of up to 220 K， with ΔTad remaining stable （≈7.5 K） across the 300-370 K range， highlighting its outstanding temperature stability and broad applicability in elastocaloric refrigeration.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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