Elevated-temperature mechanical behavior of As-cast and wrought Ti-6Al-4V-1B

W. Chen, C. J. Boehlert, J. Y. Howe, E. A. Payzant

    Research output: Contribution to journalArticle

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    Abstract

    This work studied the effect of processing on the elevated-temperature [728 K (455 °C)] fatigue deformation behavior of Ti-6Al-4V-1B for maximum applied stresses between 300 to 700 MPa (R = 0.1, 5 Hz). The alloy was evaluated in the as-cast form as well as in three wrought forms: cast-and-extruded, powder metallurgy (PM) rolled, and PM extruded. Processing caused significant differences in the microstructure, which in turn impacted the fatigue properties. The PM-extruded material exhibited a fine equiaxed α+β microstructure and the greatest fatigue resistance among all the studied materials. The β-phase field extrusion followed by cooling resulted in a strong α-phase texture in which the basal plane was predominately oriented perpendicular to the extrusion axis. The TiB whiskers were also aligned in the extrusion direction. The α-phase texture in the extrusions resulted in tensile-strength anisotropy. The tensile strength in the transverse orientation was lower than that in the longitudinal orientation, but the strength in the transverse orientation remained greater than that for the as-cast Ti-6Al-4V. The ratcheting behavior during fatigue is also discussed.

    Original languageEnglish (US)
    Pages (from-to)3046-3061
    Number of pages16
    JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
    Volume42
    Issue number10
    DOIs
    StatePublished - Oct 2011

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    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Metals and Alloys
    • Mechanics of Materials

    Cite this

    Elevated-temperature mechanical behavior of As-cast and wrought Ti-6Al-4V-1B. / Chen, W.; Boehlert, C. J.; Howe, J. Y.; Payzant, E. A.

    In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 42, No. 10, 10.2011, p. 3046-3061.

    Research output: Contribution to journalArticle

    Chen, W.; Boehlert, C. J.; Howe, J. Y.; Payzant, E. A. / Elevated-temperature mechanical behavior of As-cast and wrought Ti-6Al-4V-1B.

    In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 42, No. 10, 10.2011, p. 3046-3061.

    Research output: Contribution to journalArticle

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