Superelasticity of (TiZrHf)50Ni25Co10Cu15 high entropy shape memory alloy
Superelasticity of (TiZrHf)50Ni25Co10Cu15 high entropy shape memory alloy
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DOI：
10.1016/j.scriptamat.2020.04.017
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发表时间：
2020-09
影响因子：
6
通讯作者：
J. Yaacoub;W. Abuzaid;Florian Brenne;H. Sehitoglu
中科院分区：
文献类型：
--
作者：
J. Yaacoub;W. Abuzaid;Florian Brenne;H. Sehitoglu
研究了高熵形状记忆合金（HESMA）（TiZrHf）50 Ni 25 Co 10 Cu 15在较宽变形温度范围内的超弹性特性。轴向压缩实验不同的热处理和局部可恢复应变高达5%。在高达175°C的大温度范围内观察到超弹性。取决于热处理，在高达80 °C的变形温度下，临界应力在1.4和6 MPa/°C之间表现出Clausius-Clapeyron（CC）斜率。然而，在更高的温度下，报告了明显偏离线性和显著更高的相变应力达到1200 MPa。转化期间的温度变化报告为9 °C。
The paper elucidates the superelastic characteristics of high entropy shape memory alloy (HESMA) (TiZrHf)50Ni25Co10Cu15over a wide range of deformation temperatures. Axial compression experiments are presented for different heat treatments and local recoverable strains up to 5% are noted. Superelasticity is observed over a large temperature range up to 175°C. Depending on heat treatment, the critical stress exhibits a Clausius-Clapeyron (CC) slope between 1.4 and 6 MPa/°C up to 80 °C deformation temperature. Obvious deviations from linearity however and significantly higher transformation stresses reaching 1200 MPa are reported at higher temperatures. The temperature change during transformation is reported at 9 °C.