Strain glass state in Ni-rich Ni-Ti-Zr shape memory alloys
Strain glass state in Ni-rich Ni-Ti-Zr shape memory alloys
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DOI：
10.1016/j.actamat.2021.117232
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发表时间：
2021-10
期刊：
影响因子：
9.4
通讯作者：
S. Xu;J. Pons;R. Santamarta;I. Karaman;O. Benafan;R. Noebe
中科院分区：
文献类型：
--
作者：
S. Xu;J. Pons;R. Santamarta;I. Karaman;O. Benafan;R. Noebe
本文报道了富镍Ni-Ti-Zr形状记忆合金中存在由h相析出的前驱体阶段引起的应变玻璃态，这是该合金体系的典型特征。利用电子衍射和透射电子显微镜（TEM）对玻璃的动态力学性能和微观结构进行了检测。弹性模量的测量也表明了这些合金的非线性效应。该材料的应变玻璃态在压缩过程中表现出超弹性效应，可恢复应变水平超过4%，在230 ~ 300 K的温度范围内，应力-应变曲线的温度依赖性很小。
This work reports the existence of the strain glass state in Ni-rich Ni-Ti-Zr shape memory alloys induced by the precursor stages of the H-phase precipitation, typical of this alloy system. The strain glass is detected from dynamic mechanical testing and microstructural observations by electron diffraction and Transmission Electron Microscopy (TEM). The elastic modulus measurements also suggest theelinvareffect in these alloys. The strain glass state of this material exhibits superelastic effect in compression with recoverable strain levels over 4% and very little temperature dependence of the stress-strain curves over a temperature range of 230 to 300 K.