Sökning: "sprödhet"

Visar resultat 1 - 5 av 11 uppsatser innehållade ordet sprödhet.

  1. 1. Irradiation Embrittlement on a Core Shroud from Decommissioned BWR

    Master-uppsats, KTH/Fysik

    Författare :Åsa Bjåland; [2023]
    Nyckelord :hardness; Vickers hardness test; ATT; yield strength; irradiation embrittlement; welds; hårdhet; Vickers hårdhetstest; ATT; sträckgräns; bestrålningsförsprödning; svetsar;

    Sammanfattning : Irradiation embrittlement is a problematic issue for internal structures, such as acore shroud, in a light water reactor. It is characterized by decreased ductility andtoughness, and increased yield strength and hardening due to increased dislocations. LÄS MER

  3. 2. Towards a sustainable substitute for Acrylonitrile Butadiene Styrene (ABS) in automotive industry

    Master-uppsats, KTH/Fiber- och polymerteknologi

    Författare :Amalia Christoula; [2023]
    Nyckelord :Polylactide PLA ; Biobased; Life Cycle Analysis LCA ; Impact modifiers; Lignocellulose nanofibers LCNF; Polylaktid PLA ; Biobaserad; Livscykelanalys LCA ; Slagtålighet; Nanofibrer av lignocellulosa LCNF ;

    Sammanfattning : Syftet med detta examensarbete var att utveckla ett hållbart ersättningsmaterial till akrylnitrilbutadienstyren plast (ABS), genom att applicera principerna för grön kemi och teknik. ABS är en icke-nedbrytbar plast som till exempel används i slagtåliga produkter för hyttinteriörer. LÄS MER

  4. 3. Ab inito calculation of the formation energy of the sigma phases at 1000 Kelvin : With a five sublattice model for the ternary Iron-Chromium-Nickel system

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Fabian Mathias Veid; [2022]
    Nyckelord :;

    Sammanfattning : This project investigates the σ-phase formation energy at 1000 Kelvin using Exact Muffin TIn Orbital (EMTO) method and considers the disordered local moment approach to handle the paramagnetism in a self-consistent manner. The sigma phase is detrimental and causes embrittlement when it occurs primarily in stainless steel and superalloys with Iron (Fe) and Chromium (Cr), which is why it is necessary to understand it better and therefore avoid it. LÄS MER

  5. 4. Low temperature embrittlement of duplex stainless steels : A study of alloying elements’ effect

    Master-uppsats, KTH/Materialvetenskap

    Författare :Libang Lai; [2020]
    Nyckelord :Duplex stainless steels; low temperature embrittlement; phase separation; alloying element; vanadium addition; mechanical properties; Rostfria duplexstål; sprödhet vid låg temperatur; fasseparering; legeringselement; tillsats av vanadin; mekaniska egenskaper;

    Sammanfattning : Duplex stainless steels (DSSs), consisting of an equal amount of ferrite and austenite phases, have wide applications in e.g. vehicles, chemical engineering as well as nuclear plant  because  of  the  combination  of  excellent  mechanical properties  and  corrosion resistance. LÄS MER

  7. 5. Influence of hydrogen on mechanical properties, microstructure and fracture surface of stainless steel 316L and stainless steel 304

    Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Författare :Mustafa Adnan Tawfeeq Salman; [2020]
    Nyckelord :Hydrogen embrittlement; stainless steel; microstructure; hydrogen charging; slow and fast strain rate.; Väteförsprödning; rostfritt stål; mikrostruktur; väte laddning; långsam och snabb töjnings hastighet;

    Sammanfattning : Since hydrogen is an alternative energy source and has both economic and environmental benefits, it has received more attention. To use hydrogen a certain condition must be met, safe pressurized containers which are often made of metal. The metal isrequired due to the high mechanical strength and reasonable cost. LÄS MER