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Large elastocaloric effect in Ti–Ni shape memory alloy below austenite finish temperature.
- Source :
-
Chinese Physics B . Mar2017, Vol. 26 Issue 3, p1-1. 1p. - Publication Year :
- 2017
-
Abstract
- 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 Af 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 Af. The maximum entropy changes ΔSmax 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 Af. The temperature of the maximum entropy change remains unchanged before the plastic deformation appears but moves towards low temperature when the plastic deformation happens. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16741056
- Volume :
- 26
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Chinese Physics B
- Publication Type :
- Academic Journal
- Accession number :
- 121788618
- Full Text :
- https://doi.org/10.1088/1674-1056/26/3/036501