Thermal, magnetic field-and stress-induced transformation in Heusler-type Co-Cr-Al-Si shape memory alloys

被引：24
作者：
Odaira, Takumi [1 ]
Xu, Xiao [1 ]
Miyake, Atsushi [2 ]
Omori, Toshihiro
Tokunaga, Masashi [2 ]
Kainuma, Ryosuke [1 ]
机构：
[1] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Aoba Yama 6-6-02, Sendai, Miyagi 9808579, Japan
[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
来源：
SCRIPTA MATERIALIA | 2018年 / 153卷
关键词：
Co-based Heusler alloy; Shape memory alloy; Magnetic field-induced phase transition; Superelasticity; Phase diagram; MARTENSITIC-TRANSFORMATION; SINGLE-CRYSTALS; NI; TEMPERATURES; SUPERELASTICITY; STABILITY; NI2MNGA; SYSTEM; GA; TI;
D O I：
10.1016/j.scriptamat.2018.04.033
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The phase diagram, including the martensitic and magnetic transformations, was determined by thermoanalysis and thermomagnetization measurements in the CoxCr79-xAl10.5Si10.5 section of the Co-based Heusler shape memory alloy. Magnetization measurements under pulsed magnetic fields were conducted and magnetic field-induced reverse martensitic transformation was clearly observed at room temperature. A superelastic behavior was obtained in the Co55.7Cr23.3Al10.5Si10.5 alloy in the temperature range of 198 to 423 K. The critical stress for martensitic transformation was found to show a negative temperature dependence at temperatures lower than approximately 310 K due to the magnetic effect despite the normal temperature dependence at higher temperatures. (C) 2018 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：35 / 39
页数：5
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