Aging response of the Ti-Nb system biomaterials with β-stabilizing elements

被引：43
作者：
Guo, Qinghua [1 ]
Zhan, Yongzhong [1 ]
Mo, Honglou [1 ]
Zhang, Guanghua [1 ]
机构：
[1] Guangxi Univ, Minist Educ, Lab Nonferrous Met Mat & New Proc Technol, Nanning 530004, Guangxi, Peoples R China
来源：
MATERIALS & DESIGN | 2010年 / 31卷 / 10期
基金：
中国国家自然科学基金;
关键词：
YOUNGS MODULUS; BIOMEDICAL APPLICATIONS; MECHANICAL-PROPERTIES; ALLOYS; TI-29NB-13TA-4.6ZR;
D O I：
10.1016/j.matdes.2010.05.047
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effects of aging temperature and the contents of if-stabilizing elements on the composition of martensite alpha '' in two Ti-Nb alloys and the resulting mechanical properties were investigated for biomedical applications. The microstructures were examined by means of optical microscopy (OM) and X-ray diffraction (XRD). Vickers hardness, compressive elastic modulus and the yield strength have been measured. The results show that the decomposition mode of the martensite alpha '' in two studied alloys depends on aging treatment and the contents of beta-stabilizing elements. Various microstructures such as alpha, (alpha + beta) and (beta + omega) phases were observed to precipitate in the studied alloys after the aging treatments performed at 523 K, 773 K, 883 K and 1023 K for 0.5 h, respectively. Afterwards, the Ti-24Nb-6Zr-7.5Sn-2Fe alloy was aged at 773 K for 1 h. The compressive elastic modulus and mechanical properties of the two alloys are found to be sensitive to the microstructural change caused by aging temperature. For the Ti-24Nb-6Zr-7.5Sn-2Fe alloy, after aging at 773 K for 1 h, its yield strength, compressive elastic modulus and Vickers hardness reach 846 MPa, 26 GPa and 398 HV, respectively. This aged alloy exhibits proper comprehensive mechanical property and strength-to-modulus ratio for biomedical implant applications. (C) 2010 Elsevier Ltd. All rights reserved.
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页码：4842 / 4846
页数：5
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