Simulation of hexagonal-orthorhombic phase transformation in polycrystals

Y. W. Cui, T. Koyama, I. Ohnuma, K. Oikawa, R. Kainuma, K. Ishida

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The microstructural evolution during hexagonal-orthorhombic (HO) phase transformation in polycrystals was modeled by means of a modeling technique combining the strain-only theory and phase-field modeling. Specifically, the strain-only theory is used to describe the HO transformation, whereas phase-field modeling is employed to capture the evolution of the grain orientation in polycrystals. The modeling appropriately describes important aspects of the HO transformation behavior of polycrystals, such as the phase transition sequence, the lamellar-like twins in two orthogonal directions, streamers and striated variants. Furthermore, it predicts the accommodation of the HO polycrystal, in which the domain morphologies are rearranged in distinct manners for variously oriented grains as a response to uniaxial loading, thereby demonstrating the fact that the morphological evolution in polycrystals is a correlated collective process.

Original languageEnglish
Pages (from-to)233-241
Number of pages9
JournalActa Materialia
Volume55
Issue number1
DOIs
Publication statusPublished - 2007 Jan

Keywords

  • Computer simulation
  • Hexagonal-orthorhombic transformation
  • Microstructure
  • Phase transformation
  • Polycrystals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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