Deformation and microstructure of Ti-14Mo alloy in over aged state

Yoshito Takemoto, M. Hida, A. Sakakibara

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Deformation and microstructure were investigated on Ti-14 mass%Mo alloy in over aged state using the duplex aging method. In the over aged state only hardness decreased in spite of no change in both size and composition of ω phase. Though the ω phase aged at 623 K for 1 × 106 s had the maximum hardness and resulted in the brittle fracture through ω→β″ transformation, they became soft by over aging and transformed to α phase within the deformation band. The α particles in the band were sheared by {1011}α twinning which direction was perpendicular to the band product. The twinning of α particles was regarded as a complementary deformation with volume change in the ω→α transformation. It was suggested that the occurrence of the band product consisted of β+α phases would not be directly connected with brittle fracture.

Original languageEnglish
Pages (from-to)1067-1071
Number of pages5
JournalMaterials Transactions
Issue number12
Publication statusPublished - Dec 1997



  • α phase
  • ω phase
  • Deformation
  • Duplex age
  • Microstructure
  • Over age
  • Titanium-molybdenum alloy
  • Transformation
  • Twin

ASJC Scopus subject areas

  • Engineering(all)

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