In situ scanning electron microscopy observations of tensile deformation in a boron-modified Ti-6Al-4V alloy

C. J. Boehlert, C. J. Cowen, S. Tamirisakandala, D. J. McEldowney, D. B. Miracle

    Research output: Contribution to journalArticle

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    Abstract

    In situ scanning electron microscopy was performed during both room temperature and 480 °C tensile deformation of a boron-modified Ti-6Al-4V alloy, in order to characterize the deformation evolution. The sequence of observable surface deformation events was: TiB whisker microcracking at stresses well below the global yield stress, multiple and extensive TiB cracking after global yielding, α + β phase slip emanating from the cracked TiB whiskers, localized shear band formation and propagation leading to cracking in the α + β phases, and ductile sample failure. TiB cracking was also observed throughout the subsurface locations on post-deformed samples. The early microcracking of TiB particles did not degrade mechanical properties, and higher tensile and ultimate strengths were obtained with a ductile fracture mode at quasi-static tensile elongations equivalent to conventional Ti-6Al-4V.

    Original languageEnglish (US)
    Pages (from-to)465-468
    Number of pages4
    JournalScripta Materialia
    Volume55
    Issue number5
    DOIs
    StatePublished - Sep 2006

    Profile

    tensile deformation
    boron
    scanning electron microscopy
    Carbamyl Phosphate
    elongation
    slip
    mechanical properties
    shear
    propagation
    room temperature
    Microcracking
    Scanning electron microscopy
    Boron
    Edema Disease of Swine
    Acetanilides
    Learned Helplessness
    Abdominal Muscles
    Addison Disease
    Shear bands
    Yield stress

    Keywords

    • Fracture
    • SEM
    • Tension test
    • Titanium alloys

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Materials Science(all)
    • Metals and Alloys

    Cite this

    In situ scanning electron microscopy observations of tensile deformation in a boron-modified Ti-6Al-4V alloy. / Boehlert, C. J.; Cowen, C. J.; Tamirisakandala, S.; McEldowney, D. J.; Miracle, D. B.

    In: Scripta Materialia, Vol. 55, No. 5, 09.2006, p. 465-468.

    Research output: Contribution to journalArticle

    Boehlert, C. J.; Cowen, C. J.; Tamirisakandala, S.; McEldowney, D. J.; Miracle, D. B. / In situ scanning electron microscopy observations of tensile deformation in a boron-modified Ti-6Al-4V alloy.

    In: Scripta Materialia, Vol. 55, No. 5, 09.2006, p. 465-468.

    Research output: Contribution to journalArticle

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    abstract = "In situ scanning electron microscopy was performed during both room temperature and 480 °C tensile deformation of a boron-modified Ti-6Al-4V alloy, in order to characterize the deformation evolution. The sequence of observable surface deformation events was: TiB whisker microcracking at stresses well below the global yield stress, multiple and extensive TiB cracking after global yielding, α + β phase slip emanating from the cracked TiB whiskers, localized shear band formation and propagation leading to cracking in the α + β phases, and ductile sample failure. TiB cracking was also observed throughout the subsurface locations on post-deformed samples. The early microcracking of TiB particles did not degrade mechanical properties, and higher tensile and ultimate strengths were obtained with a ductile fracture mode at quasi-static tensile elongations equivalent to conventional Ti-6Al-4V.",
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    AU - Cowen,C. J.

    AU - Tamirisakandala,S.

    AU - McEldowney,D. J.

    AU - Miracle,D. B.

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    AB - In situ scanning electron microscopy was performed during both room temperature and 480 °C tensile deformation of a boron-modified Ti-6Al-4V alloy, in order to characterize the deformation evolution. The sequence of observable surface deformation events was: TiB whisker microcracking at stresses well below the global yield stress, multiple and extensive TiB cracking after global yielding, α + β phase slip emanating from the cracked TiB whiskers, localized shear band formation and propagation leading to cracking in the α + β phases, and ductile sample failure. TiB cracking was also observed throughout the subsurface locations on post-deformed samples. The early microcracking of TiB particles did not degrade mechanical properties, and higher tensile and ultimate strengths were obtained with a ductile fracture mode at quasi-static tensile elongations equivalent to conventional Ti-6Al-4V.

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