Construction of Ti-Nb-Ti2Cu pseudo-ternary phase diagram

Kotaro Sato, Masatoshi Takahashi, Yukyo Takada

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The aim of this study was to construct a Ti-Nb-Cu ternary phase diagram that plays the role of a map for developing new titanium alloys with excellent machinability and mechanical properties. Fifteen experimental Ti-Nb-Cu ternary alloys composed of Ti-5– 30%Nb-2–20%Cu were designed, and ingots made using Ar-arc melting furnace before casting to generate specimen. The alloy castings were evaluated in terms of their microstructures and alloy phases. A Ti-Nb-Ti2Cu pseudo-ternary phase diagram was constructed using X-ray diffractmetry results. Three alloy phases (α-Ti, β-Ti and Ti2Cu) were established within the specimen. Furthermore, the prescence of two-phase coexistence regions (α+Ti2Cu, α+β and β+Ti2Cu), and three-phase coexistence region (α+β+Ti2Cu) was noted. The findings obtained through microstructural observation corresponded well with the constructed phase diagram.

Original languageEnglish
Article numberdmj/2018-394
Pages (from-to)422-428
Number of pages7
JournalDental Materials Journal
Issue number3
Publication statusPublished - 2020


  • Microstructure
  • Ternary phase diagram
  • Ti-Nb-Cu alloy
  • Titanium alloy
  • X-ray diffraction


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