Large elastocaloric effect in Ti-Ni shape memory alloy below austenite finish temperature

IMR OpenIR

	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
发表期刊	CHINESE PHYSICS B
ISSN	1674-1056
卷号	26 期号:3 页码:-
摘要	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.; 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.
部门归属	[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
关键词	Elastocaloric Effect Martensitic Transformation Shape Memory Alloys
学科领域	Physics, Multidisciplinary
资助者	National Natural Science Foundation of China [51671192, 51531008]; Chinese Academy of Sciences [KJZD-EW-M05]
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78263
专题	中国科学院金属研究所
通讯作者	Ren, WJ (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式 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):-.