Abstract
We investigate the three-dimensional structure of a model γ-γ′ alloy using serial sectioning and digital reconstruction. The particles align in parallel two-dimensional sheets along the 〈100〉 crystallographic directions. The sheets in different regions of the microstructure are aligned along different 〈100〉 crystallographic directions. A variety of particle morphologies are observed. These morphologies are relatively independent of particle size, indicating a significant departure from single-particle equilibrium morphologies. The primary determinant of particle morphology appears to be the interparticle elastic interactions, both within sheets of particles and at the intersections of sheets. There is no evidence of particle coalescence despite the small interparticle separation.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2585-2598 |
| Number of pages | 14 |
| Journal | Acta Materialia |
| Volume | 50 |
| Issue number | 10 |
| DOIs | |
| State | Published - Jun 12 2002 |
Funding
This work was supported through NSF grant number DMR-9707073. We thank J. Alkemper and K. Thornton for assisting with the three-dimensional rendering of the microstructures.
Keywords
- Growth
- Image analysis
- Microstructure
- Phase transformations
- Precipitation
- Scanning electron microscopy (SEM)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys