Quenched-in vacancies in a β Ti-Nb-Sn alloy studied by positron lifetime spectroscopy

Y. Nagai, T. Toyama, Z. Tang, M. Hasegawa, Hiroaki Matsumoto, S. Hanada

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Quenched-in vacancies in a β Ti-Nb-Sn alloy are studied by positron annihilation spectroscopy. It has been reported that the superelastic properties of the alloy are strongly affected by the quenching temperature between 700 and 900 °C, as a consequence of the different concentrations of quenched-in vacancies. However, the present positron lifetime experiments and the corresponding first-principles calculations show that the vacancy concentration is very low (sub ppm level) for all specimens quenched from 700, 800 and 900 °C, suggesting that the variation in superelastic properties should be attributed to other factors.

Original languageEnglish
Pages (from-to)1751-1753
Number of pages3
JournalScripta Materialia
Issue number10
Publication statusPublished - 2006 May


  • Positron annihilation
  • Titanium alloys
  • Vacancies

ASJC Scopus subject areas

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


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