20.500.12556/RUL-171916 Izločevalno utrjevanje aluminijeve zlitine 7075 Precipitation hardening of aluminum alloy 7075 Aluminijeve zlitine serije 7xxx zaradi svoje nizke mase in visoke trdnosti predstavljajo veliko vlogo v letalski in transportni industriji. V tem delu je obravnavana aluminijeva zlitina 7075, katere mehanske lastnosti smo dodatno izboljšali z izločevalnim utrjevanjem. Staranje smo izvedli pri treh različnih temperaturah (105 $^°$C, 120 $^°$C in 140 $^°$C) ter različnih časih. Rezultate toplotne obdelave smo analizirali na podlagi spremembe trdote, električne prevodnosti in korozijske odpornosti. Izločene faze v mikrostrukturi smo na koncu ovrednotili še z metalografsko analizo s pomočjo svetlobnega optičnega mikroskopa. Aluminium alloys of the 7xxx series, due to their low density and high strength, play a significant role in the aerospace and transportation industries. This study focuses on the aluminium alloy 7075, whose mechanical properties were further enhanced through precipitation hardening. Ageing was conducted at three different temperatures (105 $^°$C, 120 $^°$C and 140 $^°$) and for various durations. The effects of the heat treatment were evaluated based on changes in hardness, electrical conductivity and corrosion resistance. Finally, the precipitated phases in the microstructure were characterised through metallographic examination using an optical light microscope. aluminijeva zlitina 7075 izločevalno utrjevanje trdota korozija aluminija električna prevodnost mikrostruktura aluminum alloy 7075 precipitation hardening hardness aluminum corrosion electrical conductivity microstructure true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-09-04 08:32:24 2025-09-04 08:32:26 2025-09-26 03:48:47 0000-00-00 00:00:00 2025 0 0 XX, 48 str. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.785.7:669.715:620.18(043.2) 275381 248439043 43427.pdf 43427.pdf 1 3A739BD631CFBF39C60D9226634A04E0 e48850388dfd96c7aa51dd1e58507cbdcc94be4790da3a986574d89d8235530a c60a9f8f-8958-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=215484 Fakulteta za strojništvo 0 0 0