Abstract Scope |
In this presentation, we review different approaches (including spinodal decomposition, dissolution of precipitates, annealing of multilayers, and additive manufacturing) to creating concentration modulations (CMs) for the design of novel microstructures with unprecedented properties. We demonstrate how the CMs produced at different length scales (from nanometers to microns) allow for engineering heterogeneous and hierarchical dual-phase microstructures by enabling different transformation mechanisms. These heterogeneous and hierarchical microstructures have the ability to regulate strain release during deformations by activating different deformation mechanisms at different stages, and offer unprecedented mechanical properties including linear superelasticity, ultralow elastic modulus, exceptional combination of high strength, high work-hardenability, and high ductility. This presentation demonstrates a new paradigm of heterogeneous alloy design utilizing CMs for structural and functional applications. |