Hybrid heat-source solid-state additive manufacturing of 5A06 deposition with favorable mechanical and electrochemical performance

The HHSAMed 5A06 deposition, produced through hybrid heat-source solid-state additive manufacturing (HHSAM), demonstrates a more uniform microstructure and enhanced microhardness, with a measured value of 89.9 HV0.5. Additionally, it exhibits superior mechanical properties, including increased yield strength (YS), ultimate tensile strength (UTS), and elongation (EL) in both the longitudinal direction (YS-238.3 MPa, UTS-358.1 MPa, EL-27.5%) and the building direction (YS-184.0 MPa, UTS-324.5 MPa, EL-25.7%).The heat-source enhances the material flow behavior and the interlayer bonding strength among the stacking layers, excluding the effects of grain refinement and precipitate strengthening. It demonstrates superior corrosion resistance relative to the AFSD deposition and 5A06 feedstock, attributed to the most stable passive film, a greater concentration of Al6(Fe,Mn) and the lack of Al3Mg2.