Shape memory properties of Ti-Nb-Mo biomedical alloys

被引：184
|
作者：
Al-Zain, Y. [1 ]
Kim, H. Y. [1 ]
Hosoda, H. [2 ]
Nam, T. H. [3 ,4 ]
Miyazaki, S. [1 ,3 ,4 ]
机构：
[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
[2] Tokyo Inst Technol, Precis & Intelligence Lab, Yokohama, Kanagawa 2268503, Japan
[3] Gyeongsang Natl Univ, Sch Mat Sci & Engn, Jinju 660701, Gyeongnam, South Korea
[4] Gyeongsang Natl Univ, ERI, Jinju 660701, Gyeongnam, South Korea
来源：
ACTA MATERIALIA | 2010年 / 58卷 / 12期
关键词：
Ti-Nb; Ti-Nb-Mo; Shape memory alloys; Superelasticity; MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR; INDUCED MARTENSITE; SN CONTENT; SUPERELASTICITY; TI-10V-2FE-3AL; TRANSFORMATION; GA;
D O I：
10.1016/j.actamat.2010.04.013
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Mo is added to Ti-Nb alloys in order to enhance their superelasticity. The shape memory properties of Ti-(12-28)Nb-(0-4)Mo alloys are investigated in this paper. The Ti-27Nb, Ti-24Nb-1Mo, Ti-21-Nb-2Mo and Ti-18Nb-3Mo alloys exhibit the most stable superelasticity with a narrow stress hysteresis among Ti-Nb-Mo alloys with Mo contents of 0, 1,2 and 3 at.%, respectively. The ternary alloys reveal better superelasticity due to a higher critical stress for slip deformation and a larger transformation strain. A Ti-15Nb-4Mo alloy heat-treated at 973 K undergoes (2 1 1)< 1 1 1 >-type twinning during tensile testing. Twinning is suppressed in the alloy heat-treated at 923 K due to the precipitation of the a phase, allowing the alloy to deform via a martensitic transformation process. The Ti-15Nb-4Mo alloy exhibits stable superelasticity with a critical stress for slip deformation of 582 MPa and a total recovery strain of 3.5%. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：4212 / 4223
页数：12
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