This study investigates the effect of laser shock peening without coating (LSPwC) on the mechanical and topographical properties of AlMg5 alloy walls produced by the WAAM process, without and with in-situ vibrations. Eight walls were fabricated, half of which were subjected to vibrations during deposition. After fabrication, six walls were treated with LSPwC using different combinations of power density and overlap ratio, while two reference samples remained untreated. Residual stresses were measured using X-ray diffraction (XRD) in two directions and at three wall heights, while topographical properties were determined with a digital microscope based on the parameters Wa, Wp and Wz. The results show that LSPwC increases compressive residual stresses and reduces surface height extremes, with more pronounced effects observed in samples produced with vibrations. The combination of in-situ vibrations and LSPwC proved to be an effective approach for improving the surface quality and mechanical integrity of WAAM components.
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