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A multielement alloying strategy to improve elastocaloric and mechanical properties in Ni–Mn-based alloys via copper and boron

Abstract : Ni–Mn-based shape memory alloy is a promising candidate as the solid-state elastocaloric refrigerant in the micro- or nano-refrigeration fields owing to the required small driving force. In this letter, we report a multielement alloying strategy, i.e., the co-substitution of non-magnetic element and boron for Mn, to improve the elastocaloric refrigeration efficiency and mechanical properties simultaneously. Under Cu and B co-substitution, a large adiabatic temperature change of –12.8 K and a giant specific adiabatic temperature change of 41.0 K/GPa were obtained in the directionally solidified Ni50(Mn31.7Cu2.5B0.3)In15.5 alloy. The proposed alloying manner is also favorable to enhance fracture resistance and cyclability.
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https://hal.univ-lorraine.fr/hal-03079756
Contributor : Yudong Zhang <>
Submitted on : Thursday, December 17, 2020 - 12:58:19 PM
Last modification on : Tuesday, March 30, 2021 - 3:12:03 PM

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Xiao-Ming Huang, Ying Zhao, Hai-Le Yan, Nan Jia, Shuai Tang, et al.. A multielement alloying strategy to improve elastocaloric and mechanical properties in Ni–Mn-based alloys via copper and boron. Scripta Materialia, Elsevier, 2020, 185, pp.94-99. ⟨10.1016/j.scriptamat.2020.04.001⟩. ⟨hal-03079756⟩

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