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 language | English (US) |
|---|---|
| Pages (from-to) | 404-409 |
| Number of pages | 6 |
| Journal | Materials Science and Engineering: A |
| Volume | 273-275 |
| DOIs | |
| State | Published - Dec 15 1999 |
Funding
The Manuel Lujan Jr. Neutron Scattering Center is a national user facility funded by the US DOE (Contract No. W-7405-ENG-36) and by Defense Programs. RV and DCD acknowledge the support of Daimler Benz AG in the form of a research grant. The authors also thank Dr. H. Pettermann and Dr. M.R. Daymond for helpful discussions.
Keywords
- Metal matrix composites
- Neutron diffraction
- Phase transformation
- Rietveld refinement
- Shape-memory
- Superelasticity
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering