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.
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- Revealing Anelasticity and Structural Rearrangements in Nanoscale Metallic Glass Films Using In Situ TEM Diffraction
- Sarkar, Rohit (Author)
- Ebner, Christian (Author)
- Izadi, Ehsan (Author)
- Rentenberger, Christian (Author)
- Rajagopalan, Jagannathan (Author)
- Ira A. Fulton Schools of Engineering (Contributor)
- Digital object identifier: 10.1080/21663831.2016.1228709
- Identifier TypeInternational standard serial numberIdentifier Value2166-3831
- The final version of this article, as published in Materials Research Letters, can be viewed online at: http://www.tandfonline.com/doi/full/10.1080/21663831.2016.1228709
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Sarkar, R., Ebner, C., Izadi, E., Rentenberger, C., & Rajagopalan, J. (2016). Revealing anelasticity and structural rearrangements in nanoscale metallic glass films usingin situTEM diffraction. Materials Research Letters, 1-9. doi:10.1080/21663831.2016.1228709