Introducing dislocations locally in Al-supersaturated α2-Ti3Al single crystal via nanoscale wedge indentation

Daixiu Wei, Yuichiro Koizumi, Makoto Nagasako, Yusuke Kubota, Tomoyuki Aoyagi, Yuki Nakagawa, Masahiko Yoshino, Akihiko Chiba, Hidemi Kato

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We investigated the nanoscale anisotropic deformation behavior of Al-supersaturated α2-Ti3Al single crystals, using wedge indentation with the loading axis parallel to the (0001) α2 basal plane. The deformability, plastic deformation mechanism, and introduced dislocation structures beneath the indentations were notably affected by the inclination angle between the indenter edge and basal plane. Notably, abnormal dislocation bands were introduced when the edge was parallel to the (0001) plane, which can potentially be utilized for manipulating the phase decomposition locally. The present study sheds light on the regulation of local plastic deformation and manipulation of nanoscale phase transformation in metals and alloys.

Original languageEnglish
Article number106557
JournalIntermetallics
Volume113
DOIs
Publication statusPublished - 2019 Oct

Keywords

  • Anisotropic
  • Dislocation
  • Plastic deformation
  • Titanium aluminide
  • Wedge indentation

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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