Sökning: "molybden"

Visar resultat 11 - 15 av 28 uppsatser innehållade ordet molybden.

  1. 11. Characterization of Secondary Carbides in Low-Alloyed Martensitic Model Alloy Tool Steels

    Master-uppsats, KTH/Materialvetenskap

    Författare :Jubica Jubica; [2020]
    Nyckelord :martensitic steel; secondary hardening; precipitation; STEM; EDS; Prisma; size distribution; martensitiskt stål; sekundärhärdning; utskiljning; STEM; EDS; PRISMA; storleksfördelning;

    Sammanfattning : The development of tool steels for making and shaping other materials requires a better understanding of the material's properties during manufacture. These high-quality steels include many alloying elements, which give increased hardness during tempering. For producing hardened microstructures, austenite generation is essential. LÄS MER

  3. 12. Molybden i ytvatten - En fara för laxfiskar och människor vid intag av fisken?

    Kandidat-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Julia Olsson; [2020]
    Nyckelord :molybden; toxicitet; bioackumulation; fisk; salmo; salmo trutta; Earth and Environmental Sciences;

    Sammanfattning : There are around 80, 000 polluted areas in Sweden, of which 1, 000 are classified as very high-risk areas and in need of decontamination. From the Gullspångs Elektrokemiska Fabrik AB in Sweden there is a great risk of metals, aliphatic and molybdenum spreading to the Gullspångs River. LÄS MER

  4. 13. Comparative life cycle assessment of lubricating greases for nut-runners used in industrial assembly lines

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Pranav Mithra; [2020]
    Nyckelord :Systems thinking; petroleum; manufacturing; environmental impacts; molybdenum; base oils; additives; thickeners;

    Sammanfattning : Greases are used extensively in almost all areas of life. Considering the fact that they are used in sparing quantities in most applications, the environmental impacts associated with these greases can range from different magnitudes based on the constituents of the grease. LÄS MER

  5. 14. Influence of matrix and alloying on the high cycle fatigue properties of compacted graphite iron for cylinder heads

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Erik From; [2020]
    Nyckelord :;

    Sammanfattning : Continued improvements in combustion processes, introduction of biofuels, decreasing fuel consumption and increasing specific power will inevitably lead to an increase of the combustion pressure, which can be accompanied with a temperature increase. This will increase the loading on many components and drives the development of materials more resistant to the harsh conditions close to the engine. LÄS MER

  7. 15. XRF analys av fiberbankar : Förbättring av XRF-signal genom filtreringav röntgenstrålar under vatten

    Kandidat-uppsats, Uppsala universitet/Institutionen för materialvetenskap

    Författare :Nils Eriksson; [2020]
    Nyckelord :XRF; röntgen; kvicksilver; under vatten; spektroskopi; filtrering;

    Sammanfattning : Målet med det här projektet var att undersöka huruvida en XRF signalkan förbättras genom att filtrera denna genom en tunn skiva avantingen aluminium, bly eller molybden. För att undersöka dettaanvändes programmet MCNP6. LÄS MER