Thickness-Dependent Shear Localization in Cu/Nb Metallic Nanolayered Composites
We performed molecular dynamics simulations to study the effect of the layer thickness on the shear localization in Cu/Nb metallic nanolayered composites (MNCs). Our simulation results achieve good agreement with experimental results that the inverse size effect in the strength occurs in samples with layer thickness below 2.0 nm. The strain softening observed in those samples was triggered by the shear localization. The quantitative analysis revealed that the unsymmetrical dislocation transmission across the interface induces the shear localization and promotes the shear band formation in Cu/Nb MNCs. The plastic strain mainly comes from the interface sliding within the shear band.
S. Dong et al., "Thickness-Dependent Shear Localization in Cu/Nb Metallic Nanolayered Composites," Scripta Materialia, vol. 187, pp. 323-328, Elsevier, Oct 2020.
The definitive version is available at https://doi.org/10.1016/j.scriptamat.2020.06.049
Materials Science and Engineering
Keywords and Phrases
Metallic Nanolayered Composites; Molecular Dynamics Simulation; Shear Localization; Size Effect
International Standard Serial Number (ISSN)
Article - Journal
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01 Oct 2020