Retained coarse grains in bulk nanocrystalline Ni3Al
- Author(s)
- Christian Rentenberger, Hans-Peter Karnthaler
- Abstract
Transmission electron microscopy methods were used to study the nanocrystalline structure achieved by severe plastic deformation of L12 long-range ordered Ni3Al. The deformation by high-pressure torsion (up to 40000 %) leads to a duplex structure consisting of a disordered nanocrystalline and an ordered coarse-grained structure carrying different shear strains. The volume fraction of the nanocrystalline structure increases with strain but varies locally. During the deformation micrometer sized coarse-grained volumes embedded in the nanocrystalline structure are retained; they show a predominance of orientations of high symmetry. This leads to the conclusion that the stability of the coarse grains results from their homogeneous slip caused by a homogeneous activation of the slip systems.
- Organisation(s)
- Physics of Nanostructured Materials
- Journal
- International Journal of Materials Research
- Volume
- 98
- Pages
- 255-258
- No. of pages
- 4
- ISSN
- 1862-5282
- DOI
- https://doi.org/10.3139/146.101463
- Publication date
- 2007
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 1030 Physics, Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/bf0d1f8c-8e6b-4fb9-9c16-a31b2dbc87d1