Influence of annealing on ductility of ultrafine-grained titanium processed by equal-channel angular pressing-Conform and drawing

  • Polyakov A
  • Semenova I
  • Valiev R
 et al. 
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A Grade 4 titanium was processed by equal-channel angular pressing (ECAP)-Conform and drawing to produce an ultrafine grain (UFG) size of ~180Â nm. Some samples were tested in this condition (UFG-1) and others were annealed for 1Â h at 623Â K (UFG-2). The grain boundaries are in a non-equilibrium condition after processing, but the annealing equilibrates the boundaries without any increase in grain size. This leads to significant differences in the mechanical behavior of UFG-1 and UFG-2 when they are tested at 293 and 623Â K. © 2013 Materials Research Society .

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  • Alexander V. Polyakov

  • Irina P. Semenova

  • Ruslan Z. Valiev

  • Yi Huang

  • Terence G. Langdon

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