Effect of heat treatment condition on microstructure and superelastic properties of Ti24Zr10Nb2Sn

被引：21
作者：
Lopez Pavon, Luis [1 ]
Lopez Cuellar, Enrique [1 ]
Villalpando Hernandez, Sarai [1 ]
Moreno-Cortez, Ivan E. [1 ]
Kim, Hee Young [2 ]
Miyazaki, Shuichi [2 ]
机构：
[1] Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, CIIDIT, Ave Univ S-N,Ciudad Univ, San Nicolas De Los Garza 66451, NL, Mexico
[2] Univ Tsukuba, Div Mat Sci, Tsukuba, Ibaraki 3058573, Japan
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 782卷
关键词：
Ti-24Zr-10Nb-2Sn; Superelasticity; Heat treatment; Microstructure; TI-NB-ZR; MECHANICAL-PROPERTIES; GRAIN-SIZE; MEMORY; TEXTURE; ALLOYS; BEHAVIOR; TRANSFORMATION; STRAIN; SN;
D O I：
10.1016/j.jallcom.2018.12.266
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 effect of heat treatment time and temperature on the microstructure and superelasticity of a recently developed Ti242r10Nb2Sn (at.%) superelastic alloy for biomedical purpose was investigated. As rolled specimens were annealed at temperatures between 773 K and 1173 K for times from 0.18 ks to 10.8 ks. Above 873 K, XRD analysis revealed only beta phase at room temperature and outstanding superelasticity was observed in all annealed conditions, the minimal value of the recovery strain was found to be 5% and the maximum was 7%. The superelastic recovery is strongly favored by the texture with the strong beta(200) peak. The temperature effect on superelastic properties was more significant than the time effect. Finally, abnormal grain growth phenomenon was observed by scanning electron microscope (SEM) and transmission electron microscope (TEM) in the specimen annealed at 1173 K for 10.8 ks and its presence is not desirable for cycling stability. (C) 2018 Elsevier B.V. All rights reserved.
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页码：893 / 898
页数：6
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