Improvement in fatigue strength with maintaining Young's modulus low by controlling ω-phase precipitation in β-type Ti-Nb-Ta-Zr alloy

Masaaki Nakai, Mitsuo Niinomi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to improve the fatigue strength with maintaining low Young's modulus of a biomedical β-type titanium alloy, Ti-29Nb-13Ta-4. 6Zr, a short-time aging combined with severe cold rolling was investigated. An ω phase was employed for precipitation strengthening. Because the rolling texture of β phase is formed by the cold rolling, such the ω phase may be preferentially oriented to a direction that is effective for inhibiting the increase in Young's modulus. TNTZ aged at 573 K for 3. 6 ks or 10. 8 ks after cold rolling exhibits high tensile strength and acceptable elongation with relatively low Young's modulus. However, the fatigue strength of TNTZ aged at 573 K for 3. 6 ks is not significantly improved. On the other hand, the fatigue strength of the TNTZ sample aged at 573 K for 10. 8 ks is improved as well as its tensile strength.

Original languageEnglish
Title of host publicationTi 2011 - Proceedings of the 12th World Conference on Titanium
Pages2102-2105
Number of pages4
Publication statusPublished - 2012 Dec 1
Event12th World Conference on Titanium, Ti 2011 - Beijing, China
Duration: 2011 Jun 192011 Jun 24

Publication series

NameTi 2011 - Proceedings of the 12th World Conference on Titanium
Volume3

Other

Other12th World Conference on Titanium, Ti 2011
CountryChina
CityBeijing
Period11/6/1911/6/24

Keywords

  • Aging
  • Biomaterial
  • Fatigue strength
  • Low Young's modulus
  • Microstructure
  • Omega phase
  • Titanium alloy

ASJC Scopus subject areas

  • Ceramics and Composites

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