20.500.12556/RUL-170991 Enhancing the mechanical properties ofdirected [!] energy deposition arc (DED-Arc) via processing innovations Directed Energy Deposition (DED) processes offer the advantage of producing larger parts with higher deposition rates compared to Powder Bed Fusion (PBF) additive manufacturing (AM). However, DED typically results in simpler geometries and lower resolution. When using Wire and Arc-based DED, even larger components can be manufactured at an accelerated rate, but the higher heat input may lead to undesirable microstructures, adversely affecting mechanical properties. To ensure defect-free depositions, precise process control is essential, including optimizing deposition paths, regulating inter-layer temperature, and maintaining a consistent nozzle-to-layer distance. One effective approach to improving material integrity is the application of in-situ vibrations during deposition. This technique helps reduce porosity and grain size while also enhancing surface waviness and mitigating residual stress buildup. Further refinement of material properties can be achieved through appropriate thermo-mechanical processing, leading to mechanical characteristics comparable to conventionally produced steel. This paper explores the impact of in-situ vibrations and heat treatment through case studies, analysing their effects on surface waviness, residual stress distribution, porosity, microstructure, grain size, mechanical properties, and fracture toughness. The findings demonstrate the significant benefits of these process enhancements in improving the mechanical performance of DED-fabricated components. directed energy deposition DED wire and arc additive manufacturing WAAM in-situ vibrations heat treatment porosity reduction residual stress grain refinement surface waviness mechanical properties fracture toughness computed tomography scan CT usmerjeno nanašanje kovine oblikovno obločno navarjanje z žico in-situ vibracije toplotna obdelava zmanjšanje poroznosti zaostale napetosti udrobnjevanje zrn valovitost površine mehanske lastnosti lomna žilavost true false true Angleški jezik Slovenski jezik Članek v reviji 2025-07-25 09:48:27 2025-07-25 09:48:29 2025-07-26 04:17:56 0000-00-00 00:00:00 2025 0 0 Str. XXXV-XLVIII 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.791.75 10.46793/IRMES25.plB2K 243815171 243751427 Klobcar_..._Enhancing.pdf Klobcar_..._Enhancing.pdf 1 319A0FA983BD2FA5E73C90AE87B93950 1f94a5522f6c23744f8bffa2c6f14a985764c1a77aa8fac2a0c7cba717621093 52122515-692d-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=213312 https://irmes2025.masfak.ni.ac.rs/wp-content/uploads/2025/06/PB2.pdf 1 bc109a49-692b-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=213310 Fakulteta za strojništvo 0 0 0