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.

    Original languageEnglish (US)
    Pages (from-to)263-275
    Number of pages13
    JournalMaterials Science and Engineering C
    Volume25
    Issue number3
    DOIs
    StatePublished - May 2005

    Profile

    Endometrial Hyperplasia
    tensile strength
    Fatigue of materials
    Helsinki Declaration
    Tensile strength
    elongation
    modulus of elasticity
    titanium
    Coccidiostats
    Learned Helplessness
    Addison Disease
    Capsid
    Elongation
    Titanium
    Elastic moduli
    niobium alloys
    aluminum alloys
    heat treatment
    mechanical properties
    evaluation

    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

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

    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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    AB - 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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