Tensile and fatigue evaluation of Ti-15Al-33Nb (at.%) and Ti-21Al-29Nb (at.%) alloys for biomedical applications

C. J. Boehlert, C. J. Cowen, C. R. Jaeger, M. Niinomi, T. Akahori

Research output: Contribution to journalArticle

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Abstract

In this work the fatigue and tensile behavior of Ti-15Al-33Nb (at.%) and Ti-21Al-29Nb (at.%) was evaluated and compared to that for other titanium-based biomedical implant alloys, in particular Ti-6Al-4V (wt.%). The mechanical properties of interest were fatigue strength, tensile strength, elastic modulus, and elongation-to-failure. Fatigue stress versus life curves were obtained for tests performed at room temperature in air as well as in Ringer's solution at R = 0.1 for maximum stresses between 35% and 90% of the ultimate tensile strength. The results indicated that the fatigue strength and lives and elastic modulus of these alloys is comparable to that for Ti-6Al-4V (wt.%). Considering the data scatter and deformation behavior, the Ringer's solution did not significantly affect the fatigue behavior. Heat treatment reduced the tensile strength and this corresponded to a reduction in the fatigue strength. The tensile strength of the as-processed Ti-Al-Nb alloys was slightly lower than that for Ti-6Al-4V (wt.%), and the Ti-15Al-33Nb (at.%) exhibited lower strengths and higher elongations than Ti-21Al-29Nb. Based on the current results, it is proposed that titanium-aluminum-niobium alloys will be of considerable future interest for biomedical applications.

LanguageEnglish (US)
Pages263-275
Number of pages13
JournalMaterials Science and Engineering C
Volume25
Issue number3
DOIs
StatePublished - May 2005

Profile

tensile strength
Tensile strength
Fatigue of materials
evaluation
elongation
Elongation
modulus of elasticity
titanium
Titanium
Elastic moduli
niobium alloys
Niobium alloys
aluminum alloys
Aluminum alloys
heat treatment
Heat treatment
mechanical properties
Mechanical properties
air
room temperature

Keywords

  • Biomedical implant application
  • Fatigue
  • Microstructure
  • Strength

ASJC Scopus subject areas

  • Biomaterials

Cite this

Tensile and fatigue evaluation of Ti-15Al-33Nb (at.%) and Ti-21Al-29Nb (at.%) alloys for biomedical applications. / Boehlert, C. J.; Cowen, C. J.; Jaeger, C. R.; Niinomi, M.; Akahori, T.

In: Materials Science and Engineering C, Vol. 25, No. 3, 05.2005, p. 263-275.

Research output: Contribution to journalArticle

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abstract = "In this work the fatigue and tensile behavior of Ti-15Al-33Nb (at.{\%}) and Ti-21Al-29Nb (at.{\%}) was evaluated and compared to that for other titanium-based biomedical implant alloys, in particular Ti-6Al-4V (wt.{\%}). The mechanical properties of interest were fatigue strength, tensile strength, elastic modulus, and elongation-to-failure. Fatigue stress versus life curves were obtained for tests performed at room temperature in air as well as in Ringer's solution at R = 0.1 for maximum stresses between 35{\%} and 90{\%} of the ultimate tensile strength. The results indicated that the fatigue strength and lives and elastic modulus of these alloys is comparable to that for Ti-6Al-4V (wt.{\%}). Considering the data scatter and deformation behavior, the Ringer's solution did not significantly affect the fatigue behavior. Heat treatment reduced the tensile strength and this corresponded to a reduction in the fatigue strength. The tensile strength of the as-processed Ti-Al-Nb alloys was slightly lower than that for Ti-6Al-4V (wt.{\%}), and the Ti-15Al-33Nb (at.{\%}) exhibited lower strengths and higher elongations than Ti-21Al-29Nb. Based on the current results, it is proposed that titanium-aluminum-niobium alloys will be of considerable future interest for biomedical applications.",
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