Abstract
This work elucidates the effect of interface orientation, loading mode, and crystallography on the deformation mechanisms of Cu-Nb–multilayered nanocomposites. Molecular dynamics simulations of deformation behavior of accumulative roll-bonded Cu-Nb–multilayered nanocomposites (MNCs) were performed at room temperature conditions and at a constant strain rate under iso-stress and iso-strain conditions. Interface deformation mechanisms involving nucleation of partial dislocation at the interface and gliding in the Cu layer were observed under iso-stress and iso-strain conditions. Uniaxial stress–strain curves were analyzed for tension and compression under iso-stress and iso-strain loading conditions. The stress–strain plots were explored to understand the elastic, yield, and post-yielding behavior of Cu-Nb MNCs. Under compression with interface orientation normal to the loading direction, twin nucleated via gliding of partial dislocations. Under tension in the iso-stress case, only slip-assisted deformation was observed. Conversely, the deformation behavior under compression and tension was via slip and twinning, respectively, for iso-strain conditions.
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The authors gratefully acknowledge the faculty startup support provided by the College of Engineering at the University of Nevada, Reno.
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Anugraha Thyagatur: methodology, investigation, and writing—original draft; Leslie T Mushongera: conceptualization, writing—review and editing, funding acquisition.
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Thyagatur, A., Mushongera, L.T. Unraveling the effects of interface orientation and crystallography on the deformation mechanisms of accumulative roll-bonded Cu-Nb–multilayered nanocomposites using molecular dynamics. J Mol Model 28, 166 (2022). https://doi.org/10.1007/s00894-022-05155-2
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DOI: https://doi.org/10.1007/s00894-022-05155-2