Microstructure and Mechanical Properties of Cold Drawn Ti-Nb-Ta-Zr-O Wires for Orthodontic Applications

被引：9
作者：
Zhang, Wei-dong [1 ]
Ren, Junye [2 ]
Liu, Bin [2 ]
Liu, Yong [2 ]
Wu, Zhenggang [1 ]
Qiu, Jingwen [3 ]
机构：
[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China
[2] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[3] Hunan Univ Sci & Technol, Hunan Prov Key Lab Adv Mat New Energy Storage & C, Xiangtan 411201, Peoples R China
来源：
METALS AND MATERIALS INTERNATIONAL | 2020年 / 26卷 / 07期
基金：
中国国家自然科学基金; 国家杰出青年科学基金;
关键词：
TNTZO wire; Cold swaging and cold drawing; Elastic modulus; Creep resistance; BETA-TITANIUM; BEHAVIOR; CREEP; ALLOY; DEFORMATION; EVOLUTION; TEXTURE;
D O I：
10.1007/s12540-019-00369-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ti-36Nb-2Ta-3Zr-0.35O (TNTZO) alloy is an excellent candidate for biomedical applications. In this study, a new method combining cold-swaging and cold-drawing was used to fabricate the TNTZO alloy wires with 0.3 mm diameter for orthodontic applications. The microstructure and mechanical properties of cold-drawn and annealed TNTZO wires (referred to as TNTZO(0.3)and TNTZO(0.3)(HT), respectively) were investigated. The results show that the microstructure of cold drawn TNTZO(0.3)consists of main-sized elongated grains with 70 nm width. After annealing at 700 degrees C for 5 min, the microstructure of TNTZO(0.3)(HT) wires becomes equiaxial with a grain size of ~ 5 mu m. The cold drawn TNTZO(0.3)wires exhibit improved mechanical properties, higher tensile strength (about 1000 MPa) and similar elastic modulus (69 GPa), compared to annealed TNTZO(0.3)(HT) wires. Besides, TNTZO(0.3)has higher creep resistance and lower stress exponent (around 2), compared to Ti wires and TC4 wires with the same diameter. These results prove that TNTZO(0.3)wires have most of the ideal characteristics of orthodontic wires. Graphic
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页码：973 / 978
页数：6
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