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: Research - peer-reviewArticle

    • 35 Citations

    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
    Fatigue of materials
    tensile strength
    evaluation
    Fatigue strength
    Elongation
    Elastic moduli
    Ringer's solution
    titanium-niobium-aluminum alloy
    Titanium
    elongation
    modulus of elasticity
    titanium
    Heat treatment
    Mechanical properties
    Air
    Temperature
    Niobium alloys
    Aluminum alloys
    niobium alloys

    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: Research - peer-reviewArticle

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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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