High temperature creep of alpha-2 Ti-34mol%Al polycrystals

Hiroshi Oikawa, Toshihiko Fukuda, Makoto Ohtsuka

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

Constant-stress compressive creep tests were carried out on an Al-rich α2 single-phase material, which had equiaxed-grains of 60μm in grain size, at 1050approx.1250 K under 100approx.500MPa. The type of the primary creep stage and the microstructures developed during creep depend greatly on the creep condition. The minimum creep-rate, however, can be represented by one set of parameters over the whole range of experimental condition. The stress exponent is 5.0±0.2 and the (modulus-compensated) activation energy is 360±10kJ/mol. The Dorn-type plot of the minimum creep rate reveals that the normalized creep strength of the fine-grained Ti-34mol%Al is not greatly different from that of disordered solid-solution hardened alloys.

Original languageEnglish
Pages (from-to)517-522
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume364
Issue number1
Publication statusPublished - 1995 Jan 1
EventProceedings of the 1994 MRS Fall Meeting - Boston, MA, USA
Duration: 1994 Nov 281994 Nov 30

ASJC Scopus subject areas

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

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