|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Interface-driven Phenomena in Solids: Thermodynamics, Kinetics and Chemistry
||The Effect of Interfaces and Hierarchical Structure on the Deformation Behavior of Metallic Nanolaminates
||Daniel Foley, Garritt J Tucker
|On-Site Speaker (Planned)
Interfaces in metallic materials are known to play a fundamental role in the mechanical behavior for materials exhibiting high interface density, such as nanostructured materials. Experiments on nanocrystalline metals, for example, have observed an increase in material strength with decreasing grain size – illustrating the influence of interface density and nanoscale deformation mechanics. The difference in response between polycrystalline and nanocrystalline metals has generally been attributed to the confinement of dislocation multiplication mechanisms, resulting in interface-mediated mechanisms. Utilizing atomistic simulations and non-local estimation of strain and rotation fields we demonstrate how interface density can be used to tune the mechanical properties of alternating crystalline-amorphous nanolaminates. Furthermore, altered mechanical behavior is observed by modulating both the layer thicknesses and the hierarchical elements within the crystalline layers (i.e., grain boundaries). Our results suggest avenues for improving mechanical properties by leveraging their underlying relationships with deformation and strain accommodation.
||Planned: A print-only volume