| Abstract Scope |
Additive friction stir deposition (AFSD) is an emerging solid-state, near-net-shaping technology that integrates the friction stir principle with material feeding to enable location-specific printing and free-forming in 3D space. Although it is still a relatively new process, extensive research efforts in the last few years have propelled AFSD to the forefront of innovation with focused attention from the aerospace, automotive, and defense sectors. In this presentation, I will provide a timely overview of the current development of the process, including insights of the process physics revealed by in situ monitoring, material flow study via time-resolved characterization, dynamic microstructure evolution, and niche applications, such as structural repair, material recycling and upcycling, and selective-area cladding. Future prospects on the development of hierarchical materials and the incorporation of artificial intelligence for process control are also discussed. |