Microstructure, tensile, and creep behavior of Ti-15Al-33Nb (at%) and Ti-21Al-29Nb (at%) orthorhombic+BCC alloys

C. J. Cowen, C. J. Boehlert

    Research output: ResearchConference contribution

    Abstract

    In this work the creep and elevated temperature tensile behavior of two orthorhombic (O)+body-centered-cubic (BCC) alloys, specifically Ti-15Al-33Nb(at%) and Ti-21Al-29Nb (at%), were evaluated in order to determine the effect of alloy composition and microstructure on the mechanical properties and deformation behavior. Tensile tests, performed at RT and 650°C, indicated that the Ti-21Al-29Nb alloy exhibited significantly lower elongation-to-failure values than the Ti-15Al-33Nb alloy. Heat-treatments used to precipitate greater volume fractions of the O-phase resulted in greater strength levels, while the BCC phase provided ductility. The measured creep stress exponents (1.1

    LanguageEnglish (US)
    Title of host publicationTMS Annual Meeting
    Pages93-103
    Number of pages11
    Volume2006
    StatePublished - 2006
    Event135th TMS Annual Meeting, 2006 - San Antonio, TX, United States
    Duration: Mar 12 2006Mar 16 2006

    Other

    Other135th TMS Annual Meeting, 2006
    CountryUnited States
    CitySan Antonio, TX
    Period3/12/063/16/06

    Profile

    Creep
    Microstructure
    creep
    microstructure
    Ductility
    Precipitates
    Elongation
    Volume fraction
    Heat treatment
    Mechanical properties
    Chemical analysis
    Temperature
    ductility
    mechanical property
    temperature
    effect
    test

    Keywords

    • Creep
    • Microstructure
    • Tension
    • Titanium alloys

    ASJC Scopus subject areas

    • Geology
    • Metals and Alloys

    Cite this

    Microstructure, tensile, and creep behavior of Ti-15Al-33Nb (at%) and Ti-21Al-29Nb (at%) orthorhombic+BCC alloys. / Cowen, C. J.; Boehlert, C. J.

    TMS Annual Meeting. Vol. 2006 2006. p. 93-103.

    Research output: ResearchConference contribution

    Cowen, CJ & Boehlert, CJ 2006, Microstructure, tensile, and creep behavior of Ti-15Al-33Nb (at%) and Ti-21Al-29Nb (at%) orthorhombic+BCC alloys. in TMS Annual Meeting. vol. 2006, pp. 93-103, 135th TMS Annual Meeting, 2006, San Antonio, TX, United States, 3/12/06.
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    AB - In this work the creep and elevated temperature tensile behavior of two orthorhombic (O)+body-centered-cubic (BCC) alloys, specifically Ti-15Al-33Nb(at%) and Ti-21Al-29Nb (at%), were evaluated in order to determine the effect of alloy composition and microstructure on the mechanical properties and deformation behavior. Tensile tests, performed at RT and 650°C, indicated that the Ti-21Al-29Nb alloy exhibited significantly lower elongation-to-failure values than the Ti-15Al-33Nb alloy. Heat-treatments used to precipitate greater volume fractions of the O-phase resulted in greater strength levels, while the BCC phase provided ductility. The measured creep stress exponents (1.1

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