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

Research output: Contribution to journalArticle

2 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)959-968
Number of pages10
JournalMaterials Transactions
Volume60
Issue number6
DOIs
Publication statusPublished - Jan 1 2019

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Crystal plasticity analysis of microscopic deformation mechanisms and GN dislocation accumulation depending on vanadium content in ¢ phase of two-phase Ti alloy'. Together they form a unique fingerprint.

  • Cite this