Transformation superplasticity of Ti-6Al-4V and Ti-6Al-4V/TiC composites at high stresses

C. Schuh*, D. C. Dunand

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

Abstract

Isothermal and thermal cycling tensile creep experiments are reported for Ti-6Al-4V and a Ti-6Al-4V/10 vol% TiC composite, in which the thermal cycles span a broad portion of the α/β phase transformation of Ti-6Al-4V. At low applied stresses, cyclic transformations give rise to transformation superplasticity, a deformation mechanism with higher rates of deformation and increased flow stability as compared to isothermal creep. At high stresses this flow stability is lost as a power-law regime is encountered. The experimental results are discussed in light of an analytical model, which considers creep of the weak β-phase under both the internal stresses caused by the transformation and the external stress produced by the applied load.

Original languageEnglish (US)
Pages (from-to)177-182
Number of pages6
JournalMaterials Science Forum
Volume357-359
DOIs
StatePublished - 2001
EventSuperplasticity in Advanced Materials (ICSAM-2000) - Orlando, FL, United States
Duration: Aug 1 2000Aug 4 2000

Keywords

  • Phase transformation
  • Superplasticity
  • Titanium alloy
  • Titanium composites

ASJC Scopus subject areas

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

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