20.500.12556/RUL-169564 Composition, microstructure and corrosion resistance of DED-LB additively manufactured Ti–6Al–4V alloy comparison with wrought alloy The titanium alloy Ti–6Al–4 V is widely used in medical applications due to its favourable mechanical properties, biocompatibility, and excellent corrosion resistance. This study aims to study the composition, structure and electrochemical behaviour of additively manufactured Ti–6Al–4 V alloy produced by a directed-energy deposition of powder using a laser beam (DED-LB) and compare it to wrought alloy produced by conventional metallurgy. The surface morphology and composition of the chemo-mechanically polished wrought and DED-LB samples were analysed by X-ray diffraction, scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, atomic force microscopy coupled with scanning Kelvin probe force microscopy and X-ray photoelectron spectroscopy. The electrochemical behaviour was assessed using potentiodynamic polarisation and electrochemical impedance spectroscopy in three simulated physiological solutions (Hanks’ balanced salt solution, NaCl, and artificial saliva) at 37 °C. Both alloys show highly protective corrosion behaviour in the tested media, confirming that DED-LB Ti–6Al–4 V is a promising alternative to conventional manufacturing methods for advanced metallurgical engineering applications. The alloys exhibit similar general chemical composition but different microstructure, with a lamellar αʼ-martensitic phase in the DED-LB fabricated alloy surrounded by prior β grains contrasting equiaxed α+ β structure of the wrought alloy. Differences in microstructure are related to differences in local chemical composition, which affect the course of the corrosion when polarised to high positive potentials of 6 V$_{Ag/AgCl}$. titanium alloys directed-energy deposition by laser beam simulated physiological solution Ti–6Al–4V alloy additive manufacturing microstructure corrosion titanove zlitine kovane zlitine aditivna proizvodnja mikrostruktura korozija true false true Angleški jezik Slovenski jezik Članek v reviji 2025-06-04 10:31:40 2025-06-04 10:31:42 2025-06-06 04:01:40 0000-00-00 00:00:00 2025 0 0 19 str. Vol. 1033, art. 181280 Jun. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.1/.2 1873-4669 10.1016/j.jallcom.2025.181280 238139907 1-s2.0-S0925838825028415-main.pdf 1-s2.0-S0925838825028415-main.pdf 1 F61A2FA52A658CB65A4B0E408AABAC04 a6b75c3a59214042a4ecc5dc406f31188e22b206190f45c3a4df0affececeb60 74a80171-411d-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211039 https://www.sciencedirect.com/science/article/pii/S0925838825028415 0 06eea5f4-411d-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211038 Fakulteta za strojništvo 0 0 0