Journal
SCRIPTA MATERIALIA
Volume 151, Issue -, Pages 61-65Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2018.03.043
Keywords
Ni-Mn-In alloys; Directional solidification; Martensitic transformation; Magnetostructural coupling; Magnetocaloric effect
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Funding
- National Natural Science Foundation of China [51431005, 51571056, 51771048, 51601033]
- 863 Program of China [2015AA034101]
- Fundamental Research Funds for the Central Universities of China [N160205002]
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We demonstrate a remarkable magnetocaloric effect in a directionally solidified Ni45.3 Co5.1Mn36.1In13.5 alloy with coarse-grained microstructure and strong < 001 >(A) texture. Due to this optimized microstructure and the strong magnetostructural coupling, a giant Delta T-ad up to -5.1 K is achieved under low field change of 1.5 T, which is even superior to that of polycrystalline bulk alloys under the field change of 2 T. Furthermore, it is presented that the reversible Delta T-ad can be improved after certain predeformation, which should be attributed to the introduction of certain internal stress by predeformation. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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