Nanoscale amorphization of severely deformed NiTi shape memory alloys

Autor(en)

Martin Peterlechner, Thomas Waitz, Hans-Peter Karnthaler

Abstrakt

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(en)

Physik Nanostrukturierter Materialien

Journal

Scripta Materialia

Band

60

Seiten

1137-1140

Anzahl der Seiten

4

ISSN

1359-6462

DOI

https://doi.org/10.1016/j.scriptamat.2009.02.055

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103023 Polymerphysik, 210006 Nanotechnologie, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/3bc414fd-ba0a-413b-9174-f2ae5088e51a