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

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外文摘要：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(△Tmax=16.3 K at ε=5％)and moderate COPmater values(maximum COPmater=11.8 at ε=2％)were achieved.The present nano-grained NiTi alloys exhibited great potential for applications as a highly efficient elastocaloric material.

外文关键词：

elastocaloric effectstress hysteresissuperelasticityNiTi alloy

作者：

周敏、王维、苏浩健、胡忠军、李来风

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作者单位：

Key Laboratory of Cryogenic Science and Technology,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China

Songshan Lake Materials Laboratory,Dongguan 523808,China

基金：

Science Fund of the Key Laboratory of Cryogenic Science and TechnologyScience Fund of the Key Laboratory of Cryogenic Science and Technology国家自然科学基金国家自然科学基金国家重点研发计划

项目编号：

CRYO20230203CRYO20210651872299520712232019YFA0704904

出版年：

2024

DOI：

10.1088/1674-1056/ad2a75

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

年,卷(期)：2024.33(5)

参考文献量51