A modified Hall-Petch relationship in ultrafine-grained titanium recycled from chips by equal channel angular pressing

P. Luo*, D. T. McDonald, W. Xu, S. Palanisamy, M. S. Dargusch, K. Xia

*Corresponding author for this work

Research output: Contribution to journalArticle

153 Citations (Scopus)

Abstract

Equal channel angular pressing was used to consolidate commercially pure titanium chips into fully dense bulk material with high strength (up to 650 MPa), due to an ultrafine grain size as low as 0.8 μm, and good ductility (∼16%). Electron backscattered diffraction was employed to reveal low-angle grain boundaries (LAGBs), enabling a modified Hall-Petch relationship to be analyzed in consideration of strengthening contributions from LAGBs in particular, but also interstitial solutes, high-angle grain boundaries and potential oxide dispersion.

Original languageEnglish
Pages (from-to)785-788
Number of pages4
JournalScripta Materialia
Volume66
Issue number10
DOIs
Publication statusPublished - May 2012
Externally publishedYes

Keywords

  • Equal channel angular pressing (ECAP)
  • Hall-Petch relationship
  • Recycling
  • Titanium

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