Plasticity and grain boundary diffusion at small grain sizes
- Author(s)
- Gerhard Wilde, Jens Ribbe, Gerrit Reglitz, Matthias Wegner, Harald Rösner, Yuri Estrin, Michael Zehetbauer, Daria Setman, Sergej Divinski
- Abstract
Bulk nanostructured—or ultrafine-grained materials are often fabricated by severe plastic deformation to break down the grain size by dislocation accumulation. Underlying the often spectacular property enhancement that forms the basis for a wide range of potential applications is a modification of the volume fraction of the grain boundaries. Yet, along with the property enhancements, several important questions arise concerning the accommodation of external stresses if dislocation-based processes are not longer dominant at small grain sizes. One question concerns so-called “non-equilibrium” grain boundaries that have been postulated to form during severe deformation and that might be of importance not only for the property enhancement known already today, but also for spectacular applications in the context of, e.g., gas permeation or fast matter transport for self-repairing structures. This contribution addresses the underlying issues by combining quantitative microstructure analysis at high resolution with grain boundary diffusion measurements.
- Organisation(s)
- Physics of Nanostructured Materials
- External organisation(s)
- Westfälische Wilhelms-Universität Münster, Monash University
- Journal
- Advanced Engineering Materials
- Volume
- 12
- Pages
- 758-764
- No. of pages
- 7
- ISSN
- 1438-1656
- DOI
- https://doi.org/10.1002/adem.200900333
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103023 Polymer physics, 210006 Nanotechnology, 103018 Materials physics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/plasticity-and-grain-boundary-diffusion-at-small-grain-sizes(825a7ed6-89e3-4b7f-b700-ecdf5ab26142).html