期刊
ACTA MATERIALIA
卷 87, 期 -, 页码 8-14出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2015.01.004
关键词
Elastocaloric effect; Shape memory alloy; Martensitic transformation; Elastic behavior
资金
- JSPS KAKENHI [23360280, 26289230]
- National Basic Research Program of China (973 Program) [2012CB619400]
- National Science Foundation of China [51174251]
- Grants-in-Aid for Scientific Research [23360280, 26289230] Funding Source: KAKEN
In typical shape memory alloys, significant elastocaloric effects appear in association with stress-induced martensitic transformations. However, we report here that in an Fe-31.2Pd (at.%) alloy, a significant elastocaloric effect appears due to lattice softening, which causes a weak first-order martensitic transformation at T-0 (similar to 230K). We found that in a wide temperature range of between 175 K (T-0), the alloy exhibits an adiabatic temperature decrease of more than 1.5 K when a compressive stress of 200 MPa applied in the [0 0 1] direction is removed. The refrigeration capacity calculated in this temperature range is 5 MJ/m(3). (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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