20.500.12556/RUL-127535 Termodinamična karakterizacija zlitine EN AW-7075 Thermodynamic characterization of EN AW-7075 alloy Kompleksna aluminijeva zlitina EN AW-7075 (Al-Zn-Mg-Cu) spada med visoko trdne zlitine, z 5,6–6,1 mas. % Zn, 2,1–2,9 mas. % Mg in 1,2–2,0 mas. % Cu. Zaradi dobrih mehanskih lastnosti kot so visoka trdnost, lomna žilavost in dobra duktilnost ter nizka gostota in odpornost proti koroziji, se zlitino EN AW-7075 uporablja v: letalski, vojaški, pomorski in avtomobilski industriji, za plezalno opremo, sestavne dele koles, opremo za kampiranje ter tudi v prehrambeni industriji za embalažo. Namen diplomskega dela je izvedba termodinamične karakterizacije zlitine EN AW-7075. S programom Thermo-Calc smo izvedli termodinamične izračune ravnotežnega in neravnotežnega stanja in na podlagi dobljenih izračunov izrisali izopletni fazni diagram ter Scheil-ov diagram. Izvedli smo tudi diferenčno vrstično kalorimetrijo (DSC) za vzorca v litem in homogeniziranem stanju s pomočjo naprave Netzsch STA 449C Jupiter. Odčitali smo karakteristične temperature in odgovarjajoče entalpije tvorbe posameznih faz. Complex aluminum alloy EN AW-7075 (Al-Zn-Mg-Cu) is a high-strength alloy with a 5.6 - 6.1 mass. % of zinc, 2.1-2.9 mass. % of magnesium and 1.2–2.0 mass. % of copper. Due to good mechanical properties such as high strength, fracture toughness, good ductility, low density and corrosion resistance, alloy EN AW-7075 sees its use in aerospace, military, naval, automotive industries, for climbing equipment, bicycle components, camping equipment and in the food packaging industry. The purpose of this thesis is to perform a thermodynamic characterization of the alloy EN AW-7075. With the Thermo-Calc program, we performed thermodynamic calculations of the equilibrium and non-equilibrium states, and based on the obtained calculations, we drew an isopleth phase diagram and a Scheil diagram. We also conducted differential scanning calorimetry (DSC) for the samples in cast and homogenized state using a Netzsch STA 449C Jupiter device. We determined the characteristic temperatures and the corresponding enthalpies of formation of individual phases. aluminijeve zlitine skupina 7XXX DSC termodinamični izračuni aluminum alloys group 7XXX DSC thermodynamic calculations true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2021-06-13 09:00:02 2021-06-13 09:00:17 2022-09-06 03:51:51 0000-00-00 00:00:00 2021 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 78375 67009283 6888.pdf 6888.pdf 1 A2E18CFB380826D5B15A836B12E38FC9 e20ea6b6ee275b28d1b3ef8cb1feb0da0f3e6dba30d6adc4a42b8307e899cde0 eb657ea4-cc14-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=143953 Naravoslovnotehniška fakulteta 0 0 0