Mechanical Properties and Microstructures of Beta-Type Titanium Alloy for Biomedical Applications

Abstract:

Article Preview

Plain and notch fatigue properties of a β-type titanium alloy, Ti-29Nb-13Ta-4.6Zr (TNTZ), which was subjected to various thermomechanical treatments, were investigated in order to judge its potential for biomedical applications. Microstructures of TNTZ aged at 723 K for 259.2 ks after cold rolling and those aged at 723 K for 259.2 ks after solution treatment are composed of a precipitated α phase in the β phase. However, microstructures of TNTZ aged at 598 and 673 K for 259.2 ks after cold rolling and aged at 598 K and 673 K for 259.2 ks after solution treatment are composed of a precipitated ω phase, and precipitated α and ω phases in the β phase, respectively. Futher, plain fatigue strengths of TNTZ aged after solution treatment and those of TNTZ aged after cold rolling increase with the aging temperature. In particular, TNTZ aged at 723 K after cold rolling exhibits the highest fatigue strength in both the low- and high-cycle fatigue life regions. Futher, the run-out, which is about 770 MPa, is nearly equal to that of hot-rolled Ti-6Al-4V ELI conducted with aging, which is one of the representative α+β-type titanium alloys for biomedical applications. The notch fatigue strengths of TNTZ aged at stress concentration factors of 2 and 6 decrease by 30% – 40% and 50% – 60%, respectively, as compared with the plain fatigue strengths in the low-cycle fatigue life region. Futher, the notch run-out range from 450 to 490 MPa and from 220 to 300 MPa, respecitvely; an exception to this is TNTZ aged at 598 K after cold rolling, which has a high volume fraction of the ω phase. Single- and multi- fatigue cracks initiate at the bottom of the notch at stress concentration factors of 2 and 6, respectively.

Info:

Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

557-562

Citation:

T. Akahori et al., "Mechanical Properties and Microstructures of Beta-Type Titanium Alloy for Biomedical Applications", Materials Science Forum, Vols. 539-543, pp. 557-562, 2007

Online since:

March 2007

Export:

Price:

$38.00

[1] M. Niinomi: Mat. Mater. Trans. A, 33A(2002), 477-486.

[2] Y. Okazaki, K. Kyo, Y. Ito, E. Nishimura and T. Tateishi: Materia Japan, 36(1997), 1092-1099.

[3] H. Hamanaka and T. Tsuchiya: Feramu Japan, 2(1997), 30-35.

[4] M. Niinomi, T. Hattori, K. Morikawa, T. Kasuga, A. Suzuki, H. Fukui and S. Niwa, Mater. Trans., 43(2002), 2970-2977.

DOI: https://doi.org/10.2320/matertrans.43.2970

[5] M. Niinomi: JOM, 51(1999), 32-34.

[6] M. Niinomi, T. Hattori, K. Morikawa, T. Kasuga, A. Suzuki, H. Fukui and S. Niwa: Mater. Trans., 43(2002), 2970-2977.

DOI: https://doi.org/10.2320/matertrans.43.2970

[7] R. Schenk: Titanium in Medicine, Springer, ed. by D. M. Brunette, P. Tengvall, M. Textor and P. Thomesen, (2001), 144-170.

[8] B. Gasser: Titanium in Medicine, Springer, ed. by D. M. Brunette, P. Tengvall, M. Textor and P. Thomesen, (2001), 673-701.

[9] Y. Okazaki: Materia Japan, 37(1998), 838-842.

[10] Y. Okazaki, K. Kyo, Y. Ito and T. Tateishi: Mater. Trans., 38(1997), 163-170.

[11] S. K. Jha and K. S. Ravichandran: Metall. Mater. Trans. A, 31A(2000), 703-7114.

[12] T. Akahori, M. Niinomi K. Fukunaga and I. Inagaki: Metall. Mater. Trans. A, 31A(2000), 1937-(1948).

[13] T. Akahori, M. Niinomi, H. Fukui and H. Suzuki: Mater. Trans., 45(2003), 1540-1548.

[14] K. Hayashi, S. Nisida and S. Hattori: J. Japan Soc. Mechan. Series A, 65(1999), 64-69.

Fetching data from Crossref.
This may take some time to load.