High-Resolution Digital Image Correlation Analysis of Layered α/β Two-Phase Ti–12Mo Alloy under Compressive Condition

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  • Zhu Junyu
    Department of Materials Engineering, The University of Tokyo
  • Briffod Fabien
    Department of Materials Engineering, The University of Tokyo
  • Shiraiwa Takayuki
    Department of Materials Engineering, The University of Tokyo
  • Enoki Manabu
    Department of Materials Engineering, The University of Tokyo
  • Emura Satoshi
    Research Center for Structural Materials, National Institute for Materials Science

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Abstract

<p>To introduce kink deformation into a titanium alloy, a α/β two-phase Ti–12Mo alloy with a layered structure was developed through a series of thermal-mechanical treatments. The deformation kink bands were generated during uniaxial compression tests. Strain field maps of the kink-favored grain were plotted based on high-resolution digital image correlation (HR-DIC) analysis. The observed kink deformation occurred near the triple point and was significantly influenced by intergranular deformation of the adjacent grain. In grains without kink deformation, the deformation primarily exhibited in the form of slip lines with the same direction as the α phase interface. A crystal plasticity finite element model was developed using electron backscatter diffraction (EBSD) measurements to evaluate the equivalent strain field maps and von Mises stress maps. The grain with kink deformation exhibited low plastic activity and high von Mises stress.</p>

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 64 (12), 2677-2686, 2023-12-01

    The Japan Institute of Metals and Materials

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