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Deformation behavior of bulk and nanostructured metallic glasses studied via molecular dynamics simulations

Sopu, D. and Ritter, Y. and Gleiter, H. and Albe, K. (2011):
Deformation behavior of bulk and nanostructured metallic glasses studied via molecular dynamics simulations.
In: Phys. Rev. B, American Physical Society, pp. 100202-4, 83, (10), [Online-Edition: http://prb.aps.org/abstract/PRB/v83/i10/e100202],
[Article]

Abstract

In this study, we characterize the mechanical properties of Cu64Zr36 nanoglasses under tensile load by means of large-scale molecular dynamics simulations and compare the deformation behavior to the case of a homogeneous bulk glass. The simulations reveal that interfaces act as precursors for the formation of multiple shear bands. In contrast, a bulk metallic glass under uniaxial tension shows inhomogeneous plastic flow confined in one dominant shear band. The results suggest that controlling the microstructure of a nanoglass can pave the way for tuning the mechanical properties of glassy materials.

Item Type: Article
Erschienen: 2011
Creators: Sopu, D. and Ritter, Y. and Gleiter, H. and Albe, K.
Title: Deformation behavior of bulk and nanostructured metallic glasses studied via molecular dynamics simulations
Language: English
Abstract:

In this study, we characterize the mechanical properties of Cu64Zr36 nanoglasses under tensile load by means of large-scale molecular dynamics simulations and compare the deformation behavior to the case of a homogeneous bulk glass. The simulations reveal that interfaces act as precursors for the formation of multiple shear bands. In contrast, a bulk metallic glass under uniaxial tension shows inhomogeneous plastic flow confined in one dominant shear band. The results suggest that controlling the microstructure of a nanoglass can pave the way for tuning the mechanical properties of glassy materials.

Journal or Publication Title: Phys. Rev. B
Volume: 83
Number: 10
Publisher: American Physical Society
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
Date Deposited: 22 Feb 2012 16:16
Official URL: http://prb.aps.org/abstract/PRB/v83/i10/e100202
Identification Number: doi:10.1103/PhysRevB.83.
Related URLs:
Funders: The authors acknowledge the financial support of the Deutsche Forschungsgemeinschaft (DFG) through Project No. Al-578-6., One of us (H.G.) was supported by Karlsruhe Institute of Technology (KIT) through a grant within the NES program., A DAAD-PPP travel grant is also acknowledged. Computing time was made available at HHLR Frankfurt and Darmstadt as well as by CSC Julich.
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