• Revealing anelasticity and structural rearrangements in nanoscale metallic glass films usingin situTEM diffraction

    • Rohit Sarkar
    • Department of Materials Science and Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA
    • Christian Ebner
    • Physics of Nanostructured Materials, Faculty of Physics, University of Vienna
    • Ehsan Izadi
    • Department of Mechanical and Aerospace Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA
    • Christian Rentenberger
    • Physics of Nanostructured Materials, Faculty of Physics, University of Vienna
    • Jagannathan Rajagopalan
    • Department of Materials Science and Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA
  • 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.

  • PDF

  • http://phaidra.univie.ac.at/o:705763

  • Article

  • Published Version

  • 2016

  • 5

  • 3

  • 135-143

  • Informa UK Limited

  • English

  • Open access

  • CC BY Attribution 4.0 International
    © 2016 The Author(s).

  • I 1309 – Austrian Science Fund (FWF)

  • 2166-3831

  • Metallic glass; atomic rearrangements; local elastic strain; in situ electron diffraction; strain rate experiments

  • Dewey Decimal Classification → Science → Physics