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Large elastocaloric effect in Ti-Ni shape memory alloy below austenite finish temperature
Luo, Xiao-Hua; Ren, Wei-Jun; Jin, Wei; Zhang, Zhi-Dong; Ren, WJ (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
2017-03-01
Source PublicationCHINESE PHYSICS B
ISSN1674-1056
Volume26Issue:3Pages:-
AbstractSolid refrigeration technology based on the elastocaloric effect has a great potential alternative to the conventional vapor compression cooling. Here we report the large elastocaloric effect in Ti-Ni (50 at%) shape memory alloy below its austenite finish temperature A(f) under different strain. Both Maxwell's and Clausius-Clapeyron equations are used to estimate the entropy change. The strain-induced entropy change increases with raising the strain and gets a maximum value at a few kelvins below A(f). The maximum entropy changes Delta S-max are -20.44 and -53.70 J/kg.K, respectively for 1% and 2% strain changes. Large entropy change may be obtained down to 20 K below A(f). The temperature of the maximum entropy change remains unchanged before the plastic deformation appears but moves towards low temperature when the plastic deformation happens.; Solid refrigeration technology based on the elastocaloric effect has a great potential alternative to the conventional vapor compression cooling. Here we report the large elastocaloric effect in Ti-Ni (50 at%) shape memory alloy below its austenite finish temperature A(f) under different strain. Both Maxwell's and Clausius-Clapeyron equations are used to estimate the entropy change. The strain-induced entropy change increases with raising the strain and gets a maximum value at a few kelvins below A(f). The maximum entropy changes Delta S-max are -20.44 and -53.70 J/kg.K, respectively for 1% and 2% strain changes. Large entropy change may be obtained down to 20 K below A(f). The temperature of the maximum entropy change remains unchanged before the plastic deformation appears but moves towards low temperature when the plastic deformation happens.
description.department[luo, xiao-hua ; ren, wei-jun ; zhang, zhi-dong] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china ; [jin, wei] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordElastocaloric Effect Martensitic Transformation Shape Memory Alloys
Subject AreaPhysics, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China [51671192, 51531008]; Chinese Academy of Sciences [KJZD-EW-M05]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78263
Collection中国科学院金属研究所
Corresponding AuthorRen, WJ (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Luo, Xiao-Hua,Ren, Wei-Jun,Jin, Wei,et al. Large elastocaloric effect in Ti-Ni shape memory alloy below austenite finish temperature[J]. CHINESE PHYSICS B,2017,26(3):-.
APA Luo, Xiao-Hua,Ren, Wei-Jun,Jin, Wei,Zhang, Zhi-Dong,&Ren, WJ .(2017).Large elastocaloric effect in Ti-Ni shape memory alloy below austenite finish temperature.CHINESE PHYSICS B,26(3),-.
MLA Luo, Xiao-Hua,et al."Large elastocaloric effect in Ti-Ni shape memory alloy below austenite finish temperature".CHINESE PHYSICS B 26.3(2017):-.
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