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