Formation of an ultrafine-grained structure during equal-channel angular pressing of a β-titanium alloy with low phase stability

W. Xu*, X. Wu, M. Calin, M. Stoica, J. Eckert, K. Xia

*Corresponding author for this work

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

A uniform, well-defined ultrafine-grained structure was attained by equal-channel angular pressing in a metastable Ti67.4Nb24.6Zr5Sn3 β-titanium alloy with low phase stability. In contrast, coarser β grains of several micrometers were yielded upon equivalent plastic strain in a relatively stable Ti73.5Nb19.6Ta4.5Cr2.4 alloy. The pronounced deformation-induced grain refinement is proposed to mainly result both from the stress-assisted β → α″ martensitic and α″ → β backward transformations during severe plastic deformation, and from the interaction between α″ and dislocations in the β phase.

Original languageEnglish
Pages (from-to)1012-1015
Number of pages4
JournalScripta Materialia
Volume60
Issue number11
DOIs
Publication statusPublished - Jun 2009
Externally publishedYes

Keywords

  • β-titanium alloys
  • Equal-channel angular pressing
  • Grain refinement
  • Ultrafine-grained microstructure

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