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Local nanoscale strain mapping of a metallic glass during in situ testing

Gammer, Christoph ; Ophus, Colin ; Pekin, Thomas C. ; Eckert, Jürgen ; Minor, Andrew M.

Applied Physics Letters, 23 April 2018, Vol.112(17) [Periódico revisado por pares]

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  • Título:
    Local nanoscale strain mapping of a metallic glass during in situ testing
  • Autor: Gammer, Christoph ; Ophus, Colin ; Pekin, Thomas C. ; Eckert, Jürgen ; Minor, Andrew M.
  • Assuntos: Structural, Mechanical, Optical, And Thermodynamic Properties Of Advanced Materials
  • É parte de: Applied Physics Letters, 23 April 2018, Vol.112(17)
  • Descrição: The local elastic strains during tensile deformation in a CuZrAlAg metallic glass are obtained by fitting an elliptic shape function to the characteristic amorphous ring in electron diffraction patterns. Scanning nanobeam electron diffraction enables strain mapping with a resolution of a few nanometers. Here, a fast direct electron detector is used to acquire the diffraction patterns at a sufficient speed to map the local transient strain during continuous tensile loading in situ in the transmission electron microscope. The elastic strain in tensile direction was found to increase during loading. After catastrophic fracture, a residual elastic strain that relaxes over time was observed.
  • Idioma: Inglês

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