Stress-induced martensitic transformations in NiTi and NiTi-TiC composites investigated by neutron diffraction

R. Vaidyanathan, M. A M Bourke, D. C. Dunand*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Superelastic NiTi (51.0 at.% Ni) specimens reinforced with 0, 10 and 20 vol.% TiC particles were deformed under uniaxial compression while neutron diffraction spectra were collected. The experiments yielded in-situ measurements of the thermoelastic stress-induced transformation. The evolution of austenite/martensite phase fractions and of elastic strains in the reinforcing TiC particles and the austenite matrix were obtained by Rietveld refinement [1] during the loading cycle as the austenite transforms to martensite (and its subsequent back transformation during unloading). Phase fractions and strains are discussed in terms of load transfer in composites where the matrix undergoes a stress-induced phase transformation.

Original languageEnglish (US)
Pages (from-to)404-409
Number of pages6
JournalMaterials Science and Engineering A
Volume273-275
DOIs
StatePublished - Dec 15 1999

Keywords

  • Metal matrix composites
  • Neutron diffraction
  • Phase transformation
  • Rietveld refinement
  • Shape-memory
  • Superelasticity

ASJC Scopus subject areas

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

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