Die u:cris Detailansicht:

Revealing anelasticity and structural rearrangements in nanoscale metallic glass films using in situ TEM diffraction

Autor(en)
Rohit Sarkar, Christian Ebner, Ehsan Izadi, Christian Rentenberger, Jagannathan Rajagopalan
Abstrakt

We used a novel diffraction-based method to extract the local, atomic-level elastic strain in nanoscale amorphous TiAl films during in situ transmission electron microscopy deformation, while simultaneously measuring the macroscopic strain. The complementary strain measurements revealed
significant anelastic deformation, which was independently confirmed by strain rate experiments. Furthermore, the distribution of first nearest-neighbor distances became narrower during loading and permanent changes were observed in the atomic structure upon unloading, even in the absence of macroscopic plasticity. The results demonstrate the capability of in situ electron diffraction to probe structural rearrangements and decouple elastic and anelastic deformation in metallic glasses.

Organisation(en)
Physik Nanostrukturierter Materialien
Externe Organisation(en)
Arizona State University
Journal
Materials Research Letters
Band
5
Seiten
135-143
Anzahl der Seiten
9
ISSN
2166-3831
DOI
https://doi.org/10.1080/21663831.2016.1228709
Publikationsdatum
2017
Peer-reviewed
Ja
ÖFOS 2012
103042 Elektronenmikroskopie, 103018 Materialphysik
Schlagwörter
ASJC Scopus Sachgebiete
Allgemeine Materialwissenschaften
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/30822db8-a457-47a3-b278-c3311e6bf41b