Journal
APPLIED PHYSICS LETTERS
Volume 116, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5133110
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Funding
- National Natural Science Foundation of China [51771091, 51771048, 51431005]
- Fundamental Research Funds for the Central Universities of China [N180204013]
- Liaoning Revitalization Talents Program [XLYC1802023]
- 111 Project of China 2.0 [BP0719037]
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The superelastic and elastocaloric properties of a Mn-rich Ni44Mn46Sn10 polycrystalline alloy prepared by directional solidification were studied. Owing to the coarse columnar shaped grains with strong ⟨001⟩(A) preferred orientation, a large superelastic strain up to 8% and a transformation strain of 5.6% can be obtained through compressive stress induced martensitic transformation. Moreover, a giant adiabatic temperature variation up to -18 K was achieved on removing the stress. Such a remarkable elastocaloric effect is attributed to the large transformation entropy change through composition modification and the enhanced mechanical properties due to the formation of a highly textured microstructure in the directionally solidified alloy.
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