Giant elastocaloric effect induced by lower stress in Ni-Mn-In-Fe ferromagnetic shape memory alloys
Giant elastocaloric effect induced by lower stress in Ni-Mn-In-Fe ferromagnetic shape memory alloys
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DOI：
10.1016/j.jmmm.2022.169906
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发表时间：
2022-09
影响因子：
2.7
通讯作者：
Yan Feng;J. Gao;Mengmeng Zhou;Haibo Wang
中科院分区：
文献类型：
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作者：
Yan Feng;J. Gao;Mengmeng Zhou;Haibo Wang
研究了Fe替代对Ni50Mn36−xIn14Fex（x = 0.5，1，1.5，2，4，6）铁磁形状记忆合金（FMSMA）力学性能和弹热效应（eCE）的影响。结果表明，铁掺杂提高了材料的力学性能。电弧熔炼Ni50Mn34In15Fe2合金的断裂应力和应变分别为411MPa和10.1%。通过压应力诱发马氏体相变的逆过程，获得了高达9.8 K的大绝热温度变化（ΔTad），其驱动应力为175 MPa，低于未掺杂合金的驱动应力（256 MPa）。这些结果表明，这种方法是一个实际的解决方案，以获得具有大的弹性热效应的形状记忆合金的挑战。
The influence of the substitution of Fe on the mechanical properties and elastocaloric effect (eCE) in Ni50Mn36−xIn14Fex(x = 0.5, 1, 1.5, 2, 4, 6) ferromagnetic shape memory alloys (FMSMAs) have been investigated. The results show that mechanical properties are improved by iron doping. The fracture stress and strain of arc melting Ni50Mn34In15Fe2alloy are 411 MPa and 10.1 %, respectively. A large adiabatic temperature change (ΔTad) of up to 9.8 K was obtained via the reverse process of compressive stress-induced martensitic transformation with a lower driving stress of 175 MPa compared to the undoped alloy (256 MPa). These results show that this approach is a practical solution to the challenge of obtaining shape memory alloys with a large elastocaloric effect.