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Experiments and atomic-scale simulations suggest that the transmission ofplasticity carriers in deforming amorphous-crystalline nanolaminates ismediated by the biphase interface between the amorphous and crystalline layers.In this paper, we present a micromechanics model for these biphasenanolaminates that describes defect interactions through theamorphous-crystalline interface (ACI). The model is based on aneffective-temperature framework to achieve a unified description of the slow,configurational atomic rearrangements in both phases when driven out ofequilibrium. We show how the second law of thermodynamics constrains thedensity of defects and the rate of configurational rearrangements, and applythis framework to dislocations in crystalline solids and shear transformationzones (STZs) in amorphous materials. The effective-temperature formulationenables us to interpret the observed movement of dislocations to the ACI andthe production of STZs at the interface as a "diffusion" of configurationaldisorder across the material. We demonstrate favorable agreement withexperimental findings reported in (Kim et al., Adv. Funct. Mater., 2011), anddemonstrate how the ACI acts as a sink of dislocations and a source of STZs.

Deformation in amorphous-crystalline nanolaminates -- an effective-temperature theory and interaction between defects