| Abstract Scope |
Additive friction stir deposition is an innovative additive manufacturing technology that integrates the friction stir principle with material feeding. In this talk, I discuss its applications for the repair of aerospace aluminum plates and selective cladding on automotive aluminum sheet metals. In additive repair, this process enables complete filling of through-holes or grooves in ¼” plates. Significant material mixing is observed across the interface due to the co-plastic deformation of the sidewall and deposited material, which is continuously compressed and sheared with the arrival of the newly supplied material. In cladding on thin substrates of 1.4 mm thick, this process enables high-quality cladding without interface/surface defects or damage to the substrates. Based on the curvature measurement of the substrate distortion, the residual stress and mismatch strain caused by thermal gradients are estimated. Thanks to the solid-state nature, the estimated values are low, well below the elastic limit of the material. |