20.500.12556/RUL-162269 Tribokorozijske lastnosti aluminijevih zlitin utrjenih s kvazikristali diplomsko delo Tribocorrosion properties of aluminium alloys hardened with quasicrystals diploma work Diplomsko delo obravnava tribokorozijske lastnosti treh zlitin, in sicer komercialne zlitine DIN 226 in dveh kvazikristalnih zlitin. Ena kvazikristalna zlitina je bila pripravljena iz tehnično čistih elementov, ostali sta bili pretaljeni iz ingotov narejenih v industriji. Zlitine smo ulili v jekleno kokilo in iz njih so bili izrezani tribokorozijski preizkušanci. Opravljena je bila tudi preiskava mikrostrukture ulitkov s svetlobnim mikroskopom, vrstičnim elektronskim mikroskopom, na katerem je bila opravljena tudi energijsko disperzijska spektroskopija (EDS), izmerjena pa je bila tudi trdota posameznih mikrostrukturnih sestavin. Tribokorozijske lastnosti so bile izmerjene z napravo pin on disc and oscillating tribotester, ki omogoča sočasno spremljanje koeficienta trenja in potenciala odprtega kroga. Prisotnost trde kvazikristalne faze v mikrostrukturi očitno zmanjša koeficient trenja in tudi zniža spremembo korozijskega potenciala pri začetku tribološkega obremenjevanja, kar lahko povežemo z boljšimi tribokorozijskimi lastnostmi v primerjavi s komercialno zlitino DIN 226. Bachelor’s thesis investigates the tribocorrosion properties of three different alloys: a commercial alloy (DIN 226) and two quasicrystalline alloys. One quasicrystalline alloy was prepared from technically pure elements, while the other two alloys were re-melted from industrial ingots. The alloys were cast in a steel die and the tribocorrosion test pieces were cut from them. The microstructure of the castings was also examined using a light microscope and a scanning electron microscope, on which energy dispersive spectroscopy (EDS) was performed. Additionally, the hardness of individual microstructure elements was also tested. The tribocorrosion properties were measured employing a “pin- on- disc” and “oscillating tribotester”, with the primary focus on measuring the coefficient of friction and the open-circuit potential. The presence of a hard quasicrystalline phase in the microstructure was shown to reduce the coefficient of friction and potentially limit the change in corrosion potential at the onset of tribological loading, which can be linked to the improved tribocorrosion properties compared to the commercial alloy DIN 226. kvazikristali tribologija korozija tribokorozija aluminijeva zlitina quasicrystals tribology corrosion tribocorrosion aluminium alloy true false false P. Popovič Slovenski jezik Angleški jezik Diplomsko delo/naloga 2024-09-20 09:00:10 2024-09-20 09:00:33 2024-10-18 09:43:26 0000-00-00 00:00:00 2024 0 Ljubljana 0 Ljubljana XII, 45 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669 101589 212052227 23022.pdf 23022.pdf 1 86385F01DBB983986785FA3524D7692D b6186f1b01761399efefe18ff6cd14e76b5e7b5cdcb5f9920558432bd1dfaeb0 ec83c8e5-771d-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=191471 Naravoslovnotehniška fakulteta 0 0 0