Effect of deformation-induced ω phase on the mechanical properties of metastable β-type Ti-V alloys

Xingfeng Zhao, Mitsuo Niinomi, Masaaki Nakai, Junko Hieda

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

A series of metastable β-type binary Ti( 1822) V alloys were prepared to investigate the effect of deformation-induced products (deformation-induced ω phase transformation and mechanical twinning) on the mechanical properties of metastable β-type titanium alloys. The microstructures, Young's moduli, and tensile properties of the alloys were systemically examined. Ti( 1820) V alloys subjected to solution treatment comprise a β phase and a small amount of athermal ω phase, while Ti22V alloy subjected to solution treatment consists of a single β phase. Ti( 1820) V alloys subjected to solution treatment exhibit relatively low Young's moduli and low tensile strengths as compared to cold-rolled specimens. Both deformation-induced ω phase transformation and {332} βh113i β mechanical twinning occur in all of the alloys during cold rolling. The occurrences of {332} βh113i β mechanical twinning and deformationinduced ω phase transformation are dependent on the β stability of the alloys. After cold rolling, all of the alloys comprise a β phase and an ω phase. The Young's moduli of Ti( 1822) V alloys increase because of the formation of a deformation-induced ω phase during cold rolling. The significant increase in tensile strength is attributed to the combined effect of the deformation-induced ω phase transformation and workhardening during cold rolling.

Original languageEnglish
Pages (from-to)1379-1384
Number of pages6
JournalMaterials Transactions
Volume53
Issue number8
DOIs
Publication statusPublished - 2012

Keywords

  • Beta-type alloys
  • Deformation-induced omega phase transformation
  • Mechanical twinning
  • Tensile properties
  • Young's modulus

ASJC Scopus subject areas

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

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