Elastocaloric effect of all-d-metal Heusler NiMnTi(Co) magnetic shape memory alloys by digital image correlation and infrared thermography
Elastocaloric effect of all-d-metal Heusler NiMnTi(Co) magnetic shape memory alloys by digital image correlation and infrared thermography
复制标题
通过数字图像相关和红外热成像研究全d金属Heusler NiMnTi(Co)磁性形状记忆合金的弹热效应
DOI：
10.1063/1.5077076
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发表时间：
2019
影响因子：
4
通讯作者：
Liu J.
中科院分区：
文献类型：
--
作者：
Wei Z. Y.;Sun W.;Shen Q.;Shen Y.;Zhang Y. F.;Liu E. K.;Liu J.
用数字图像相关(DIC)和红外(IR)相结合的方法研究了Ni50Mn32Ti18和Ni35Co15Mn35Ti15非织构多晶全金属Heusler合金的应力诱发马氏体相变行为及其相关的弹性热效应(Ece)。当应变水平为3.9%时，Ni50Mn32Ti18的绝热温度变化(ΔTad)为10.7 K，而在应变水平为4.6%时，Ni35Co15Mn35Ti15表现出可逆的绝热温度变化(ΔTad=9.0 K)。在低应变水平下(3.2%)，Ni50Mn32Ti18为塑性变形，从DIC图上看，空间应变变化很小。相反，Ni35Co15Mn35Ti15可以超弹变形，并伴随着较大的空间应变变化，这主要归因于不同取向的晶粒在机械载荷作用下的相变应变和杨氏模数与晶体取向的关系。Ni35Co15Mn35Ti15合金ECE的可逆性的改善可能与Co元素的引入促进了d-d杂化有关。我们用数字图像相关(DIC)和红外(IR)热成像技术研究了Ni50Mn32Ti18和Ni35Co15Mn35Ti15非织构多晶全d金属Heusler合金的应力诱发马氏体相变行为及其相关的弹性热效应(Ece)。当应变水平为3.9%时，Ni50Mn32Ti18的绝热温度变化(ΔTad)为10.7 K，而在应变水平为4.6%时，Ni35Co15Mn35Ti15表现出可逆的绝热温度变化(ΔTad=9.0 K)。在低应变水平下(3.2%)，Ni50Mn32Ti18为塑性变形，从DIC图上看，空间应变变化很小。相反，Ni35Co15Mn35Ti15可以超弹变形，并伴随着较大的空间应变变化，这主要归因于相变应变的晶向依赖性和来自三维空间的杨氏模量。
We have studied the stress-induced martensitic transformation behaviors and the associated elastocaloric effect (eCE) for non-textured polycrystalline all-d-metal Heusler alloys of Ni50Mn32Ti18 and Ni35Co15Mn35Ti15 by a combination of Digital Image Correlation (DIC) and Infrared (IR) thermography techniques. A large but irreversible adiabatic temperature change (ΔTad) of 10.7 K at a strain level of 3.9% is observed for Ni50Mn32Ti18, whereas Ni35Co15Mn35Ti15 exhibits a reversible eCE with ΔTad = 9.0 K at a strain level of 4.6%. At lower strain levels ( 3.2%), Ni50Mn32Ti18 is plastically deformed with small strain variation in space from the DIC map. In contrast, Ni35Co15Mn35Ti15 can be deformed superelastically accompanied by large strain variation in space, which can be ascribed predominately to the crystalline orientation dependence of both the transformation strain and the Young's modulus from different orientated grains under mechanical loading. The improved reversibility of eCE for Ni35Co15Mn35Ti15 is supposed to be associated with the enhancement of d-d hybridization by the introduction of the element Co.We have studied the stress-induced martensitic transformation behaviors and the associated elastocaloric effect (eCE) for non-textured polycrystalline all-d-metal Heusler alloys of Ni50Mn32Ti18 and Ni35Co15Mn35Ti15 by a combination of Digital Image Correlation (DIC) and Infrared (IR) thermography techniques. A large but irreversible adiabatic temperature change (ΔTad) of 10.7 K at a strain level of 3.9% is observed for Ni50Mn32Ti18, whereas Ni35Co15Mn35Ti15 exhibits a reversible eCE with ΔTad = 9.0 K at a strain level of 4.6%. At lower strain levels ( 3.2%), Ni50Mn32Ti18 is plastically deformed with small strain variation in space from the DIC map. In contrast, Ni35Co15Mn35Ti15 can be deformed superelastically accompanied by large strain variation in space, which can be ascribed predominately to the crystalline orientation dependence of both the transformation strain and the Young's modulus from di...