Non-monotonic aging temperature dependence of superelasticity of Ti 72Nb15Zr10Al3 quaternary alloys

Hiroyuki Tada, Tokujiro Yamamoto, Xinmin Wang, Hidemi Kato

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The influence of aging on the superelastic behavior of Ti 72Nb15Zr10Al3 alloy (which is associated with the martensitic transformation from β to α″ martensite) was investigated. The precipitation of ω phase during aging significantly affects the mechanical properties. A non-monotonic change in the stress required for martensitic transformation was observed as the aging temperature changed from 453 to 603 K. This variation in stress may be attributed to two factors: change of chemical composition in the matrix and internal strain because of ω phase formation. The likely variation in the stress for martensitic transformation associated with each of these effects was estimated. As the volume fraction of ω phase increased, the change in the chemical composition produced a greater effect than the change in the internal strain.

Original languageEnglish
Pages (from-to)1502-1509
Number of pages8
JournalMaterials Transactions
Volume54
Issue number8
DOIs
Publication statusPublished - 2013 Sep 3

Keywords

  • Aging
  • Omega phase
  • Shape memory
  • Superelastic alloy
  • Titanium alloys

ASJC Scopus subject areas

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

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