Phase Constitution, Mechanical Property and Corrosion Resistance of the Ti-Nb Alloys


Article Preview

Recently, people devote to the development of Ni-free shape memory alloys in order to avoid the Ni-hypersensitivity and toxicity and pursue absolute safety. The shape memory effect and superelasticity have been reported in the biomedical Ti-Nb based alloys. The purpose of this paper is to report the phase constitution, tensile property, shape memory effect and corrosion resistance of the Ti-Nb alloys. The phase constitutions of the Ti-Nb alloys are investigated by means of X-ray diffraction (XRD). The results reveal that β+α′′ phases are presented in the Ti-35Nb alloy and only β phase in the Ti-52Nb alloy at room temperature. The tensile test and bending tests indicate that the Ti-35Nb alloy exhibits shape memory effect. The shape recovery ratio is near to 80% when the bending strain is 4.4% and decreases with the increase of the total bending strain. The corrosion resistance of the Ti-Nb alloys in the Hank's solution and artificial saliva (pH=7.4) at 37 are investigated by OCP, Tafel and anodic polarization methods. The results indicate that the Ti-35Nb alloy has a better corrosion resistance in the artificial saliva and can replace the Ti-Ni alloy in the dental application. In the non-oral condition, the Ti-52Nb alloy may be preferable.



Key Engineering Materials (Volumes 324-325)

Edited by:

M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz




B. L. Wang et al., "Phase Constitution, Mechanical Property and Corrosion Resistance of the Ti-Nb Alloys", Key Engineering Materials, Vols. 324-325, pp. 655-658, 2006

Online since:

November 2006




[1] M. Semlitsch, F. Staub and H. Webber: Biomed. Tech. Vol. 30 (1985), p.334.

[2] R. Köter, D. Vieluf, M. Kiehn, et al.: the Lancet. Vol. 356 (2000), pp.1895-1897.

[3] C.C. Shih, S.J. Lin, Y.L. Chen, et al.: J. Biomed. Mater. Res. Vol. 52 (2000), p.359.

[4] H.Y. Kim, H. Satoru, J. I. Kim, et al.: Materials Transaction JIM. Vol. 45 (2004), p.2443.

[5] M.F. Lopez, A. Gutierrez and J.A. Jimenez: Electrochimical Acta. Vol. 47 (2002), p.1359.

[6] L. El. Medawar, P. Rocher, et al.: Biomolecular Engineering. Vol. 19 (2002), pp.153-160.