Journal
MATERIALS RESEARCH LETTERS
Volume 5, Issue 5, Pages 306-313Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/21663831.2016.1275864
Keywords
Multilayers; nanostructured materials; molecular dynamics; nucleation theory; yield locus
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Funding
- Qatar National Research Fund [NPRP] [7 - 1470 - 2528]
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The mechanical behavior of nanoscale ceramic-metallic (NbC/Nb) multilayer composites with different thickness ratios is investigated using molecular dynamics (MD) simulations. Based on the obtained stress-strain behavior and its dependence on temperature, strain rate, and loading path, the flow stress for the onset of plasticity is identified and modeled based on the nucleation theory, and the in-plane yield loci for different layer thicknesses are constructed. The results are used to establish the plastic flow potential for developing a continuum viscoplastic constitutive model for potential use in large-scale applications. [GRAPHICS] .
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