Calculated Assessment of the Stress-Strain State of the Aluminum Alloy AMg6 After Additive Surfacing-Induced Electrodynamic Compaction.

The paper deals with the 3D printing process that is compatible with electrodynamic processing (EDP) of the printed layer in order to increase the density of the latter. Based on mathematical modeling, the influence of the impactor shape for EDP on the stress-strain state of the AMg6 aluminum alloy layer was studied. The formation of residual compressive stresses in the EDP zone was taken as a compaction criterion. The distribution of values along the thickness of the plate of the main parameters and components of the stress-strain state, in particular, the plastic deformation and stress zone dimensions, the depth and width of the contact interaction zone in the metal layer interacting with an impactor roller moving normal to the layer at speeds of 1, 5, and 10 m/s, was determined. The cylindrical impactor with a rounded end surface usage instead a straight quadrangular prism with a rounded side surface formed a higher-density layer, characterized by generation of compressive stresses up to the yield strength of the AMg6 alloy. This helps optimize the structure of the printed metal and increase its durability by forming compressive stress fields in the electrodynamic compaction zone. [ABSTRACT FROM AUTHOR]