Progress on the Effect and Mechanism of Ultrasonic Impact Treatment on Additive Manufactured Metal Fabrications

Metal fabrications experience complex physical metallurgical processes during additive manufacturing, leading to residual stress and coarse microstructure with directional growth. It significantly affects the comprehensive performance of fabrications, which limits application manufacturing. Ultrasonic impact treatment (UIT), as a strengthening means assist can effectively improve state refine performance. This paper introduces effect UIT on AM metal morphology, distribution, surface roughness, internal defects, gain deeper understanding role additively manufactured is based working principle process parameters. In addition, mechanism in manufacturing described from perspective plastic deformation substructure formation, providing support for shape property control assisted by UIT. Finally, issues that need be studied depth are summarized, an outlook future research directions taken.