中国物理B ›› 2024, Vol. 33 ›› Issue (5): 56501-056501.doi: 10.1088/1674-1056/ad2a75

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Enhanced superelasticity and reversible elastocaloric effect in nano-grained NiTi alloys with low stress hysteresis

Min Zhou(周敏)1,†, Wei Wang(王维)2,‡, Haojian Su(苏浩健)1, Zhongjun Hu(胡忠军)1,§, and Laifeng Li(李来风)1   

  1. 1 Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    2 Songshan Lake Materials Laboratory, Dongguan 523808, China
  • 收稿日期:2023-12-23 修回日期:2024-02-06 接受日期:2024-02-19 出版日期:2024-05-20 发布日期:2024-05-20
  • 通讯作者: Min Zhou, Wei Wang, Zhongjun Hu E-mail:mzhou@mail.ipc.ac.cn;wangwei@sslab.org.cn;zjhu@mail.ipc.ac.cn
  • 基金资助:
    Project supported by the Science Fund of the Key Laboratory of Cryogenic Science and Technology (Grant Nos. CRYO20230203 and CRYO202106), the National Natural Science Foundation of China (Grant Nos. 51872299 and 52071223), the National Key Research and Development Program of China (Grant No. 2019YFA0704904).

Enhanced superelasticity and reversible elastocaloric effect in nano-grained NiTi alloys with low stress hysteresis

Min Zhou(周敏)1,†, Wei Wang(王维)2,‡, Haojian Su(苏浩健)1, Zhongjun Hu(胡忠军)1,§, and Laifeng Li(李来风)1   

  1. 1 Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    2 Songshan Lake Materials Laboratory, Dongguan 523808, China
  • Received:2023-12-23 Revised:2024-02-06 Accepted:2024-02-19 Online:2024-05-20 Published:2024-05-20
  • Contact: Min Zhou, Wei Wang, Zhongjun Hu E-mail:mzhou@mail.ipc.ac.cn;wangwei@sslab.org.cn;zjhu@mail.ipc.ac.cn
  • Supported by:
    Project supported by the Science Fund of the Key Laboratory of Cryogenic Science and Technology (Grant Nos. CRYO20230203 and CRYO202106), the National Natural Science Foundation of China (Grant Nos. 51872299 and 52071223), the National Key Research and Development Program of China (Grant No. 2019YFA0704904).

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摘要： Solid-state cooling technologies have been considered as potential alternatives for vapor compression cooling systems. The search for refrigeration materials displaying a unique combination of pronounced caloric effect, low hysteresis, and high reversibility on phase transformation was very active in recent years. Here, we achieved increase in the elastocaloric reversibility and decrease in the friction dissipation of martensite transformations in the superelastic nano-grained NiTi alloys obtained by cold rolling and annealing treatment, with very low stress hysteresis (6.3 MPa) under a large applied strain (5%). Large adiabatic temperature changes ($\Delta T_{\rm max}=16.3$ K at $\varepsilon =5$%) and moderate COP$_{\rm mater}$ values (maximum COP$_{\rm mater}=11.8$ at $\varepsilon =2$%) were achieved. The present nano-grained NiTi alloys exhibited great potential for applications as a highly efficient elastocaloric material.

关键词: elastocaloric effect, stress hysteresis, superelasticity, NiTi alloy

Abstract: Solid-state cooling technologies have been considered as potential alternatives for vapor compression cooling systems. The search for refrigeration materials displaying a unique combination of pronounced caloric effect, low hysteresis, and high reversibility on phase transformation was very active in recent years. Here, we achieved increase in the elastocaloric reversibility and decrease in the friction dissipation of martensite transformations in the superelastic nano-grained NiTi alloys obtained by cold rolling and annealing treatment, with very low stress hysteresis (6.3 MPa) under a large applied strain (5%). Large adiabatic temperature changes ($\Delta T_{\rm max}=16.3$ K at $\varepsilon =5$%) and moderate COP$_{\rm mater}$ values (maximum COP$_{\rm mater}=11.8$ at $\varepsilon =2$%) were achieved. The present nano-grained NiTi alloys exhibited great potential for applications as a highly efficient elastocaloric material.

Key words: elastocaloric effect, stress hysteresis, superelasticity, NiTi alloy

中图分类号:  (Entropy)

  • 65.40.gd
46.25.Hf (Thermoelasticity and electromagnetic elasticity (electroelasticity, magnetoelasticity)) 62.20.fg (Shape-memory effect; yield stress; superelasticity)