Two-way shape memory effect in a Ti-Zr-Nb-Ta high-temperature shape memory alloy  

作　　者：Cheng-Yang Xiong Tuo Li Jun Wang Yan Li 

机构地区：[1]School of Materials Science and Engineering,Beihang University,Beijing,100191,China

出　　处：《Rare Metals》2024年第3期1257-1262,共6页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51371016);the Fundamental Research Funds for the Central Universities(Nos.YWF-16-BJ-J-49 and YWF-17-BJ-J-23)。

摘　　要：The two-way shape memory effect in a Ti-18.5Zr-10Nb-3.5Ta high-temperature shape memory alloy was investigated.X-ray diffraction measurem ent shows that the alloy is composed of orthorhombicα"-martensite.ωphase is not found in Ti-18.5Zr-10Nb-3.5Ta alloy due to the suppressing effect of Ta element.Theα"-martensite laths are found in the transmission electron microscope observation;after the bending deformation,there appear a lot of dislocations.The alloy exhibits a shape memory strain of 3.8%aud a high reverse martensite transformation start temperature of 464 K.The maximum two-way shape memory strain of 1.2%is obtained in the alloy with the prebending training strain of 10%.The mechanism can be ascribed to the effect of internal stress field caused by dislocations.

关 键 词：Ti-Zr Shape memory alloys Two-way shape memory effect 

分 类 号：TG139.6[一般工业技术—材料科学与工程]