Vickers and knoop micro-hardness behavior of coarse-and ultrafine-grained titanium

K. P. Sanosh*, A. Balakrishnan, L. Francis, T. N. Kim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


The present study focuses on the relationship of hardness with grain size for commercially pure titanium (Cp-Ti) and ultra fine grained titanium (UFG-Ti) produced by equal channel angular process (ECAP) of Cp-Ti). Vickers and Knoop indentations of UFG-Ti at different loads was ∼2.5 times harder than those of Cp-Ti. X-ray diffraction (XRD) analysis showed peak broadening in UFG-Ti due to reduced grain size and micro-lattice strains. Scanning electron microscopy (SEM) revealed that ECAP had reduced the grain size of Cp-Ti by ∼10 times. Weibull statistics showed UFG-Ti with lower dispersion in hardness values compare to Cp-Ti indicating a more uniform microstructure.

Original languageEnglish (US)
Pages (from-to)904-907
Number of pages4
JournalJournal of Materials Science and Technology
Issue number10
StatePublished - 2010
Externally publishedYes


  • Hardness
  • Knoop
  • Titanium
  • Ultrafine-grained
  • Vickers

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry


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