20.500.12556/RUL-184026 Tribologija 3D tiska kovin Tribology of 3D printed metals Doktorska disertacija obravnava vpliv procesnih parametrov aditivne proizvodnje kovin na topografijo površin, mikrostrukturo, mehanske lastnosti in tribološko obnašanje aditivno izdelanih komponent. Raziskava je osredotočena na dve industrijsko pomembni zlitini, AlSi10Mg in maraging jeklo 18Ni300, izdelani s postopkom selektivnega laserskega taljenja, pri čemer sta bila sistematično spreminjana laserska moč in hitrost skeniranja. Eksperimentalna študija zajema analizo površinske topografije, poroznosti, mikrostrukture in trdote ter njihovo povezavo s trenjem in obrabo v suhem in mazalnem drsnem kontaktu. Tribološki preizkusi so bili izvedeni v konfiguracijah "ball-on-disc" pri različnih kontaktnih tlakih in drsnih pogojih. Rezultati so pokazali, da procesni parametri pomembno vplivajo na anizotropijo površin, mikrostrukturne značilnosti in trdoto, kar se neposredno odraža v mehanizmih trenja in obrabe. Ugotovljeno je bilo, da tribološko obnašanje ni odvisno samo od posameznega parametra, temveč od medsebojnega vpliva procesnih pogojev, materialnih lastnosti in kontaktnih razmer. Disertacija prispeva k boljšemu razumevanju triboloških mehanizmov pri aditivno proizvedenih kovinah ter nudi osnovo za optimizacijo procesnih parametrov glede na zahteve konkretnih aplikacij. This doctoral thesis investigates the influence of metal additive manufacturing process parameters on surface topography, microstructure, mechanical properties, and tribological behaviour of additively manufactured components. The study focuses on two industrially relevant alloys, AlSi10Mg and maraging steel 18Ni300, produced by selective laser melting, with systematic variations of laser power and scanning speed. The experimental work includes analyses of surface topography, porosity, microstructure, and hardness, and their correlation with friction and wear behaviour under dry and lubricated sliding conditions. Tribological tests were conducted using ball-on-disc configurations under different contact pressures and sliding regimes. The results demonstrate that process parameters strongly affect surface anisotropy, microstructural features, and hardness, which directly influence the prevailing friction and wear mechanisms. It was shown that the tribological performance cannot be attributed to a single parameter but arises from the combined interaction of processing conditions, material properties, and contact conditions. This dissertation advances the understanding of tribological behaviour in additively manufactured metals and provides a basis for process parameter optimization tailored to specific application requirements. aditivna proizvodnja kovin tribologija energijska gostota mikrostruktura trenje obraba metal additive manufacturing tribology energy density microstructure friction wear true false false [U. Klanjšček] Slovenski jezik Angleški jezik Doktorsko delo/naloga 2026-06-24 08:30:34 2026-06-24 08:30:58 2026-07-01 11:22:11 0000-00-00 00:00:00 2026 0 Ljubljana 0 XXVIII, 158 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.9.04:539.92:669(043.3) 285812 283217923 46993.pdf 46993.pdf 1 C3DA8B573C0EE0952DACB7E22EFFEE9C d47360bf97e8c3db6e26011bb750ef7e48b5b1df32dc5335dc1732c1d984fbdd 31a58a94-6f96-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=236470 Fakulteta za strojništvo 0 0 0