Microstructural characterization of friction-stir processed ti-6al-4v

Sergey Mironov, Yutaka S. Sato, Hiroyuki Kokawa, Satoshi Hirano, Adam L. Pilchak, Sheldon Lee Semiatin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The present work was undertaken to shed additional light on the globular-α microstructure produced during FSP of Ti-6Al-4V. To this end, the electron backscatter diffraction (EBSD) technique was employed to characterize the crystallographic aspects of such microstructure. In contrast to the previous reports in the literature, neither the texture nor the misorientation distribution in the α phase were random. Although the texture was weak, it showed a clear prevalence of the P1 and C-fiber simple-shear orientations, thus providing evidence for an increased activity of the prism-<a> and pyramidal <c+a> slip systems. In addition, the misorientation distribution exhibited a crystallographic preference of 60° and 90° boundaries. This observation was attributed to a partial α→β→α phase transformation during/following high-temperature deformation and the possible activation of mechanical twinning.

Original languageEnglish
Article number976
Pages (from-to)1-12
Number of pages12
JournalMetals
Volume10
Issue number7
DOIs
Publication statusPublished - 2020 Jul

Keywords

  • Electron backscatter diffraction
  • Friction stir processing
  • Microstructure
  • Texture
  • Ti-6Al-4V

ASJC Scopus subject areas

  • Materials Science(all)

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