Elastic deformation behaviour of Ti-24Nb-4Zr-7.9Sn for biomedical applications

被引：554

作者：

Hao, Y. L. ^{[1
]}

Li, S. J. ^{[1
]}

Sun, S. Y. ^{[1
]}

Zheng, C. Y. ^{[1
]}

Yang, R. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

ACTA BIOMATERIALIA | 2007年 / 3卷 / 02期

基金：

中国国家自然科学基金;

关键词：

biomedical titanium alloy; Young's modulus; superelasticity;

D O I：

10.1016/j.actbio.2006.11.002

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 [生物医学工程];

摘要：

In this paper, the elastic deformation behaviour of a recently developed P-type titanium alloy Ti-24Nb-4Zr-7.9Sn (wt.%) that consists of non-toxic elements and is intended for biomedical applications is described. Tensile tests show that this alloy in the as hot-rolled state exhibits peculiar non-linear elastic behaviour with maximum recoverable strain up to 3.3% and incipient Young's modulus of 42 GPa. Solution treatment at high temperature has trivial effect on super-elasticity but decreases strength and slightly increases the incipient Young's modulus. Ageing treatment in the (alpha + beta) two-phase field increases both strength and Young's modulus and results in a combination of high strength and relatively low elastic modulus. In spite of the formation of the a phase, short time ageing has no effect on super-elasticity, whereas the non-linear elastic behaviour transforms gradually to normal linear elasticity with the increase of ageing time. We suggest sluggish, partially reversible processes of stress-induced phase transformation and/or incipient kink bands as the origin of the above peculiar elastic behaviour. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：277 / 286

页数：10

共 34 条

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