Electrical resistivity mapping of titanium and zirconium discs processed by high-pressure torsion for homogeneity and phase transformation evaluation

Rin Haraguchi, Yuuki Yoshimatsu, Takashi Nagaoka, Makoto Arita, Kaveh Edalati, Zenji Horita

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

High-pressure torsion (HPT) was applied to discs of pure Ti and Zr under pressures of 2 and 6 GPa, and the evolution of electrical resistivity was investigated. The electrical resistivity increased with increasing the distance from the disc centre in both Ti and Zr, but the distribution of electrical resistivity became more homogenous with increasing the number of HPT turns, i.e. with increasing the shear strain. The electrical resistivity increased more significantly when Ti and Zr were processed under 6 GPa because of the formation of high-pressure ω phase. The distribution of hardness with distance from disc centre and number of HPT turns were basically similar to those of electrical resistivity distribution. In situ electrical resistivity measurements during heating confirmed that the ω-Zr phase was thermally more stable than the ω-Ti phase.

Original languageEnglish
Pages (from-to)6778-6788
Number of pages11
JournalJournal of Materials Science
Volume52
Issue number11
DOIs
Publication statusPublished - Jun 1 2017

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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