Crystal plasticity analysis of microscopic deformation mechanisms and GN dislocation accumulation depending on vanadium content in ¢ phase of two-phase Ti alloy

Yoshiki Kawano, Tetsuya Ohashi, Tsuyoshi Mayama, Masatoshi Mitsuhara, Yelm Okuyama, Michihiro Sato

研究成果: ジャーナルへの寄稿記事

抄録

Inhomogeneous deformation of a single ¡-¢ colony in a Ti6Al4V alloy under uniaxial tensile conditions was numerically simulated using a crystal plasticity finite element (CPFE) method, and we predicted density changes in geometrically necessary dislocations (GNDs) depending on the vanadium concentration in the ¢ phase (V¢). The geometric model for the CPFE analysis was obtained by converting data from electron back-scatter diffraction patterns into data for the geometric model for CPFE analysis, using a data conversion procedure previously developed by the authors. The results of the image-based crystal plasticity analysis indicated that smaller V¢ induced greater stress in the ¡ phase and smaller stress in the ¢ phase close to the ¡-¢ interfaces in the initial stages of deformation because of the elastically softer ¢ phase with lower V¢. This resulted in greater strain gradients and greater GND density close to the interfaces in the initial stages of deformation within the single ¡-¢ colony when the ¢ phase plastically does not deform.

元の言語英語
ページ(範囲)959-968
ページ数10
ジャーナルMaterials Transactions
60
発行部数6
DOI
出版物ステータス出版済み - 1 1 2019

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Vanadium
plastic properties
vanadium
Plasticity
Crystals
Finite element method
crystals
Diffraction patterns
finite element method
diffraction patterns
gradients
Electrons
electrons

All Science Journal Classification (ASJC) codes

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

これを引用

Crystal plasticity analysis of microscopic deformation mechanisms and GN dislocation accumulation depending on vanadium content in ¢ phase of two-phase Ti alloy. / Kawano, Yoshiki; Ohashi, Tetsuya; Mayama, Tsuyoshi; Mitsuhara, Masatoshi; Okuyama, Yelm; Sato, Michihiro.

:: Materials Transactions, 巻 60, 番号 6, 01.01.2019, p. 959-968.

研究成果: ジャーナルへの寄稿記事

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abstract = "Inhomogeneous deformation of a single ¡-¢ colony in a Ti6Al4V alloy under uniaxial tensile conditions was numerically simulated using a crystal plasticity finite element (CPFE) method, and we predicted density changes in geometrically necessary dislocations (GNDs) depending on the vanadium concentration in the ¢ phase (V¢). The geometric model for the CPFE analysis was obtained by converting data from electron back-scatter diffraction patterns into data for the geometric model for CPFE analysis, using a data conversion procedure previously developed by the authors. The results of the image-based crystal plasticity analysis indicated that smaller V¢ induced greater stress in the ¡ phase and smaller stress in the ¢ phase close to the ¡-¢ interfaces in the initial stages of deformation because of the elastically softer ¢ phase with lower V¢. This resulted in greater strain gradients and greater GND density close to the interfaces in the initial stages of deformation within the single ¡-¢ colony when the ¢ phase plastically does not deform.",
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AU - Kawano, Yoshiki

AU - Ohashi, Tetsuya

AU - Mayama, Tsuyoshi

AU - Mitsuhara, Masatoshi

AU - Okuyama, Yelm

AU - Sato, Michihiro

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