Nanoscale amorphization of severely deformed NiTi shape memory alloys
- Author(s)
- Martin Peterlechner, Thomas Waitz, Hans-Peter Karnthaler
- Abstract
NiTi shape memory alloys deformed by high-pressure torsion (HPT) were investigated by transmission electron microscopy. Radial sections of the HPT discs facilitate the analysis of nanoscale amorphous and crystalline phases. Ultrathin amorphous ribbons forming at grain boundaries are intersected by shear bands. At higher deformation they transform into thicker amorphous bands containing nanocrystalline debris. In the case of planar sections, the presence of amorphous phase can be obscured by overlapping nanocrystals leading to moiré contrast.
- Organisation(s)
- Physics of Nanostructured Materials
- Journal
- Scripta Materialia
- Volume
- 60
- Pages
- 1137-1140
- No. of pages
- 4
- ISSN
- 1359-6462
- DOI
- https://doi.org/10.1016/j.scriptamat.2009.02.055
- Publication date
- 2009
- 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/nanoscale-amorphization-of-severely-deformed-niti-shape-memory-alloys(3bc414fd-ba0a-413b-9174-f2ae5088e51a).html