Strength scaling law, deformation kinetics and mechanisms of nanostructured Ti

Y. K. Li, F. Liu, Guangping Zheng, D. Pan, Y. H. Zhao, Y. M. Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

We investigate the tensile properties, strain rate sensitivity, and activation volume of nanostructured Ti prepared by equal channel angular pressing plus a series of thermal treatment. Simultaneous enhancement of strength and tensile ductility is achieved. The strain rate sensitivity is found to decrease with decreasing grain sizes (~150-450. nm). A new Hall-petch relationship is presented and discussed. The analyses on the internal friction peaks at around -70 °C suggest that twins could play the primary role for the strain hardening of the annealed nanostructured Ti, consistent with the miniscule activation volumes.
Original languageEnglish
Pages (from-to)141-147
Number of pages7
JournalMaterials Science and Engineering A
Volume573
DOIs
Publication statusPublished - 20 Jun 2013

Keywords

  • Activation volume
  • Hall-petch relationship
  • Internal friction
  • Nanostructured Ti
  • Strain rate sensitivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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