Homogeneous flow and size dependent mechanical behavior in highly ductile Zr65Ni35 metallic glass films - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Acta Materialia Année : 2017

Homogeneous flow and size dependent mechanical behavior in highly ductile Zr65Ni35 metallic glass films

Résumé

Motivated by recent studies demonstrating a high strength- high ductility potential of nano-scale metallic glass samples, the mechanical response of freestanding Zr65Ni35 film with sub-micron thickness has been investigated by combining advanced on-chip tensile testing and electron microscopy. Large deformation up to 15% is found for specimen thicknesses below 500 nm with variations depending on specimen size and frame compliance. The deformation is homogenous until fracture, with no evidence of shear banding. The yield stress is doubled when decreasing the specimen cross-section, reaching 3 GPa for small cross-sections. The fracture strain variation is related to both the stability of the test device and to the specimen size. The study concludes on clear disconnect between the mechanisms controlling the onset of plasticity and the fracture process. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Domaines

Matériaux

Dates et versions

hal-01914050 , version 1 (06-11-2018)

Identifiants

Citer

Matteo Ghidelli, Hosni Idrissi, Sebastien Gravier, Jean-Jacques Blandin, Jean-Pierre Raskin, et al.. Homogeneous flow and size dependent mechanical behavior in highly ductile Zr65Ni35 metallic glass films. Acta Materialia, 2017, 131, pp.246-259. ⟨10.1016/j.actamat.2017.03.072⟩. ⟨hal-01914050⟩
56 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More