Effect of Zr on the martensitic transformation and the shape memory effect in Ti-Zr-Nb-Ta high-temperature shape memory alloys

被引：42
作者：
Wang, Jun [1 ]
Li, Qiquan [1 ]
Xiong, Chengyang [1 ]
Li, Yan [1 ,2 ]
Sun, Baohui [3 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Beihang Univ, Beijing Key Lab Adv Funct Mat & Thin Film Technol, Beijing 100191, Peoples R China
[3] Lanzhou Seemine SMA Co Ltd, Lanzhou 730010, Gansu, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 737卷
基金：
中国国家自然科学基金;
关键词：
Shape memory alloy; Ti-Zr; Mechanical properties; Martensitic transformation; SUPERELASTIC BEHAVIOR; MECHANICAL-BEHAVIOR; BIOMEDICAL ALLOYS; MICROSTRUCTURE; STRAIN; STABILITY; SN;
D O I：
10.1016/j.jallcom.2017.12.003
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The microstructures, phase transformations, mechanical properties and shape memory effect of Ti-xZr-10Nb-4Ta (x = 16, 18, 19 and 19.5 at. %) alloys were investigated. The X-ray diffraction and transmission electron microscopy results showed that the Ti-16Zr-10Nb-4Ta alloy is composed of single alpha ''-martensite, while the others consisted of predominant orthorhombic alpha ''-martensite phase and a small amount of the beta phase. The reverse martensitic transformation starting temperature (As) was 477 K for the Ti-16Zr-10Nb-4Ta alloy and decreased non-linearly with increasing Zr content. The addition of Zr resulted in the appearance of the b phase, thus elevating the stress for martensite re-orientation. However, it weakened the plasticity and the shape memory effect. The highest shape memory strain and the largest tensile strain in Ti-16Zr-10Nb-4Ta alloy were found to be 4% and 16%, respectively. (c) 2017 Elsevier B.V. All rights reserved.
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页码：672 / 677
页数：6
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