The creep behavior of powder-metallurgy processed Ti-6Al-4V-1B(wt.%)

    Research output: Contribution to journalArticle

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    Abstract

    The elevated-temperature (400-455 °C) tensile-creep deformation behavior of a powder-metallurgy processed Ti-6Al-4V-1B(wt.%) alloy was evaluated for applied stresses between 400 MPa and 450 MPa. The extruded alloy exhibited aligned TiB whiskers along with a lenticular α+β phase morphology. In situ tensile-creep observations indicated that the TiB whisker cracking occurred prior to crack formation in the α and β phases. The extent of surface cracking within the secondary creep stage was significant. Post-mortem analysis revealed that TiB cracking was also observed within the bulk of the sample though the extent of cracking within the bulk was not as severe as at the surface. Overall, the secondary creep rates were similar to that for a Ti-6Al-4V-1B(wt.%) cast alloy and significantly lower than those for Ti-6Al-4V(wt.%). Thus, 1 wt.%B improved the creep resistance of Ti-6Al-4V(wt.%).

    Original languageEnglish (US)
    Pages (from-to)434-439
    Number of pages6
    JournalMaterials Science and Engineering A
    Volume510-511
    Issue numberC
    DOIs
    StatePublished - Jun 15 2009

    Profile

    tensile creep
    powder metallurgy
    Creep
    creep strength
    cast alloys
    crack initiation
    temperature
    Edema Disease of Swine
    Argon
    Powder metallurgy
    Acetanilides
    Carbamyl Phosphate
    Eosinophilic Granuloma
    Addison Disease
    Temporal Lobe Epilepsy
    Creep resistance
    Crack initiation
    Temperature

    Keywords

    • Boron
    • Creep
    • Microstructure
    • Powder metallurgy
    • Titanium

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering
    • Mechanics of Materials

    Cite this

    The creep behavior of powder-metallurgy processed Ti-6Al-4V-1B(wt.%). / Boehlert, C. J.

    In: Materials Science and Engineering A, Vol. 510-511, No. C, 15.06.2009, p. 434-439.

    Research output: Contribution to journalArticle

    Boehlert, C. J. / The creep behavior of powder-metallurgy processed Ti-6Al-4V-1B(wt.%).

    In: Materials Science and Engineering A, Vol. 510-511, No. C, 15.06.2009, p. 434-439.

    Research output: Contribution to journalArticle

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    abstract = "The elevated-temperature (400-455 °C) tensile-creep deformation behavior of a powder-metallurgy processed Ti-6Al-4V-1B(wt.%) alloy was evaluated for applied stresses between 400 MPa and 450 MPa. The extruded alloy exhibited aligned TiB whiskers along with a lenticular α+β phase morphology. In situ tensile-creep observations indicated that the TiB whisker cracking occurred prior to crack formation in the α and β phases. The extent of surface cracking within the secondary creep stage was significant. Post-mortem analysis revealed that TiB cracking was also observed within the bulk of the sample though the extent of cracking within the bulk was not as severe as at the surface. Overall, the secondary creep rates were similar to that for a Ti-6Al-4V-1B(wt.%) cast alloy and significantly lower than those for Ti-6Al-4V(wt.%). Thus, 1 wt.%B improved the creep resistance of Ti-6Al-4V(wt.%).",
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