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

Autor:	Rohit Sarkar, Christian Ebner, Ehsan Izadi, Christian Rentenberger, Jagannathan Rajagopalan
Jazyk:	angličtina
Rok vydání:	2017
Předmět:	Metallic glass atomic rearrangements local elastic strain in situ electron diffraction strain rate experiments Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 5, Iss 3, Pp 135-143 (2017)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2016.1228709
Popis:	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.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/db4ed272115d4404914d38bb7f1b17af Zobrazit plný text záznamu View record in DOAJ