Enhancing directed energy deposited AL5356 through in situ workpiece vibrationsImširović, Mirza (Avtor) Trdan, Uroš (Avtor) Klobčar, Damjan (Avtor) Bračun, Drago (Avtor) Nagode, Aleš (Avtor) directed energy deposition (DED)vibrationsresidual stressgas porositygrain refinementaluminium alloysThis study explores an innovative method to enhance Directed Energy Deposition (DED) of aluminum 5356 products by integrating an electromagnetic vibration system into the DED setup. The application of vibrations significantly improved surface quality, reducing surface waviness and increasing building efficiency by 14%, from 78.5% to 92.25%.Gas porosity was reduced from 1.5 ± 0.04% in as-built (AB) components to 0.34 ± 0.07% in vibration-assisted (VA) parts. Tensile tests showed a marked reduction in anisotropy, with the tensile strength deviation between the x and z directions decreasing to less than 0.4% for vibration-assisted samples, compared to 7.9% for as-built ones. Additionally, secondary phase analysis revealed a homogenization effect, with magnesium- and iron-rich precipitates displaying a finer dispersion (3.57 ± 3.42 μm²) compared to 11.28 ± 12.49 μm² in as-built parts. Overall, the findings highlight the potential of vibration-assisted DED to improve part properties, reduce defects, and advance the DED manufacturing process.20242025-01-16 11:47:56Članek v reviji166519sl