Sökning: "Copper zinc alloys"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden Copper zinc alloys.

  1. 1. Thermodynamic modelling of the copper-zinc-tin ternary system : A study towards lead-free brass

    Master-uppsats, KTH/Materialvetenskap

    Författare :Caterina Radogna; [2023]
    Nyckelord :Brass-based alloys; Lead-free brass; Calphad; Thermo-Calc; Thermodynamic description; Mässingsbaserade legeringar; Blyfri mässing; Calphad; Thermo-Calc; Termodynamisk beskrivning;

    Sammanfattning : Lead (Pb) is frequently used as an alloying element in brass to enhance machinability and castability. However, this element poses a significant risk to human health and the environment. The 2021 revision of the Drinking Water Directive imposed stricter limits on Pb content in brass, encouraging the development of lead-free brass. LÄS MER

  3. 2. Studie av syretillgångens inverkan på nötning av hårdmetall vid bearbetning av kopparlegeringar

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad materialvetenskap

    Författare :Julia Rosengren; [2023]
    Nyckelord :tribologi; nötning; hårdmetall; mässing;

    Sammanfattning : During the production of metal zippers, cemented carbide (CC) tools are used to cut preformed brass wire into small elements. Even though the cemented carbide is much harder than the copper alloy, it gets worn and eventually the tool must be replaced. LÄS MER

  4. 3. Evaluation of a novel method to investigate diffusion between copper-zinc alloys and cemented carbides

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad materialvetenskap

    Författare :André Larsson; [2022]
    Nyckelord :Diffusion; Brass; Copper alloys; Copper zinc alloys; Wear; Cemented carbide; Diffusion couple;

    Sammanfattning : When slow wear mechanisms are studied it is important to examine slower processes, such as diffusion. Such processes can have a significant impact over time and can cause other phases to form, which can have a large effect on the wear. LÄS MER

  5. 4. Microstructure-corrosion interrelations in new low-lead and lead-free brass alloys

    Master-uppsats, KTH/Materialvetenskap

    Författare :Emil Stålnacke; [2017]
    Nyckelord :Brass; dezincification; annealing; detrimental phases; heat treatment; microstructure;

    Sammanfattning : In new low-lead and lead-free brass alloys, it is not understood how the corrosion properties,such as dezincification, are related to material composition as well as annealing temperatureand duration. This study aims to fill this knowledge gap by mapping sixteen annealingconditions and three different brass alloy compositions to their respective microstructure anddezincification performance. LÄS MER

  7. 5. Aluminium alloys ability to catalyse the oxidation of biodiesel : Development of a procedure to test alloys

    Master-uppsats, KTH/Kraft- och värmeteknologi

    Författare :Ivan Khudur; [2017]
    Nyckelord :Accelerated aging; aluminium; aluminium alloys; biodiesel; copper; oxidation stability; RME; test method;

    Sammanfattning : Biodiesel is a renewable and biodegradable fuel that has the possibility to replace conventional diesel fuel and reduce the environmental pollution. Despite its environmental benefits, it has been shown to cause damage to the vehicle engines, due to its oxidative properties. LÄS MER