Superplasticity of Sintered Titanium Alloy with Martensitic Structure

K. Okazaki, T. Tsuchiyama, N. Nakamura, S. Takaki

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    3 Citations (Scopus)

    Abstract

    The behavior of superplastic deformation in a sintered Ti-4mass%Cr alloy with martensitic structure (martensitic material) was examined in connection with the structural change during tensile test at elevated température. The martensitic material has the maximum elongation of about 300% at 1023K, in spite of containing about 6vol% of pores. During tensile testing, fine equiaxed duplex structure is formed from martensitic structure characterized by acicular a' grains, and it is confirmed that such a structural change is realized with the assist of mechanical shear and that, without deformation, equiaxization of acicular a' grains does not occur. The formation of fine equiaxed duplex structure make the grain boundary sliding possible, and this leads to an appearance of superplasticity.

    Original languageEnglish
    Pages (from-to)121-126
    Number of pages6
    JournalMaterials Science Forum
    Volume304-306
    DOIs
    Publication statusPublished - 1999

    All Science Journal Classification (ASJC) codes

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

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