Shape memory characteristics of (TiZrHf)50Ni25Co10Cu15 high entropy shape memory alloy

被引：94
作者：
Chen, Chih-Hsuan [1 ]
Chen, Yue-Jin [1 ]
机构：
[1] Natl Taiwan Univ, Dept Mech Engn, Taipei 106, Taiwan
来源：
SCRIPTA MATERIALIA | 2019年 / 162卷
关键词：
High entropy alloy; Shape memory alloys (SMA); Martensitic phase transformation; Differential scanning calorimetry (DSC); X-ray diffraction (XRD); SOLID-SOLUTION; LATTICE;
D O I：
10.1016/j.scriptamat.2018.11.023
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A homogenized (TiZrHf)(50)Ni25Co10Cu15 high entropy shape memory alloy (HESMA) was studied to investigate its transformation behavior and shape memory effect. After solution treatment at 1000 degrees C, the (TiZrHf)(50)Ni(25)Co(10)Cu(15)HESMA still contained Ti2Ni-like second phase and (Ti, Zr, Hf) carbide, and thus was not a single solid solution. It exhibited a broad transformation temperature range with M-s = 36.0 degrees C and M-f = -80.4 degrees C. In a three-point bending test, the (TiZrHf)(50)Ni25Co10Cu15 HESMA showed a reversible strain of 4.8% under 650 MPa, which is similar to the performance of Ti50Ni50 alloy but with a much higher output work density. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：185 / 189
页数：5
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