| Abstract Scope |
Heterostructured materials are a new class of structural metals that exploit the incompatible plastic deformation between the mesoscopic soft and hard zones to implement unprecedented mechanical properties, most remarkably, the synergy of strength and ductility. To date, the manufacturing of heterostructured materials has mainly relied on traditional processing routes, such as accumulative roll bonding. In this talk, I introduce a new manufacturing strategy using additive friction stir deposition, which is an emerging solid-state additive process that integrates the friction stir principle with material feeding. By engineering the feed material, we are able to additively manufacture heterostructured materials that consist of mesoscopic zones with predefined volume fractions and controllable complex geometries in 3D. The microstructure of each mesoscopic zone is governed by continuous or discontinuous dynamic recrystallization and can be tailored via process control. Therefore, this strategy offers a vast design space for both the mesostructure and microstructure of heterostructured materials. |