Transformation-mismatch plasticity of NiAl/ZrO2 composites - experiments and continuum modeling

Peter Zwigl, David C. Dunand*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

NiAl composites containing 10 and 20 vol.% unstabilized zirconia particles were thermally cycled around the polymorphic phase transformation range of zirconia while being subjected to an external uniaxial tensile stress. The strain rate of the composite during thermal cycling is significantly higher than the isothermal creep rate of either composite or unreinforced matrix at the same average temperature. An established model for transformation-mismatch plasticity of an allotropic, creeping metal has been adapted to describe the results. To the best of our knowledge, this is the first demonstration of transformation-mismatch plasticity in a composite induced through transformation of the minority-phase reinforcement.

Original languageEnglish (US)
Pages (from-to)63-72
Number of pages10
JournalMaterials Science and Engineering A
Volume298
Issue number1-2
DOIs
StatePublished - 2001

Keywords

  • Creep
  • Metal matrix composites
  • NiAl
  • Phase transformations
  • Superplasticity
  • ZrO

ASJC Scopus subject areas

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

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