Cyclic deformation behavior and fatigue lives of ultrafine-grained Ti-6AL-4V ELI alloy for medical use

Saitova LR, Höppel HW, Göken M, Semenova IP, Valiev RZ (2009)


Publication Status: Published

Publication Type: Journal article

Publication year: 2009

Journal

Publisher: ELSEVIER SCI LTD

Book Volume: 31

Pages Range: 322-331

Journal Issue: 2

DOI: 10.1016/j.ijfatigue.2008.08.007

Abstract

It was shown that introducing an ultrafine-grained (UFG) microstructure in pure metals as well as some alloys leads to strongly enhanced fatigue properties. The cyclic deformation behavior of UFG Ti-6Al-4V ELI (extra low interstitials) alloy is studied by both strain and stress controlled fatigue tests using plastic strain amplitudes between 3 x 10(-4) and 5 x 10(-3) and stress amplitudes ranging from 550 to 670 MPa. The UFG microstructures were obtained by equal channel angular pressing (ECAP) with different number of passes followed by a subsequent thermomechanical treatment (TMT). When compared to the conventional grain (CG) size counterpart, the UFG alloy exhibited a pronounced enhancement in the fatigue life in the S-N (Wohler) diagram. It was also shown that additional UFG processing prior to TMT did not result in any further improvement of the fatigue resistance. Furthermore, microstructural investigations revealed a high cyclic stability of the UFG microstructure. (C) 2008 Elsevier Ltd. All rights reserved.

Authors with CRIS profile

Additional Organisation(s)

Involved external institutions

How to cite

APA:

Saitova, L.R., Höppel, H.W., Göken, M., Semenova, I.P., & Valiev, R.Z. (2009). Cyclic deformation behavior and fatigue lives of ultrafine-grained Ti-6AL-4V ELI alloy for medical use. International Journal of Fatigue, 31(2), 322-331. https://doi.org/10.1016/j.ijfatigue.2008.08.007

MLA:

Saitova, L. R., et al. "Cyclic deformation behavior and fatigue lives of ultrafine-grained Ti-6AL-4V ELI alloy for medical use." International Journal of Fatigue 31.2 (2009): 322-331.

BibTeX: Download