How is Friction Extrusion related to additive friction stir deposition (AFSD)?

Friction Extrusion and Additive Friction Stir Deposition are different solid-state processes, but they share important principles involving friction, thermomechanical processing, and severe plastic deformation. FE primarily creates or modifies material and feedstock, while AFSD deposits material to build or repair components. FE may provide opportunities for developing specialized feedstock for downstream friction-based additive processes.