Sökning: "FGA"

Hittade 4 uppsatser innehållade ordet FGA.

  1. 1. Life and fracture in very high cycle fatigue of a high strength steel

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Daniel Karlsson; [2021]
    Nyckelord :Very high cycle fatigue; VHCF; Fractography; Fine granular area; FGA; High strength tool steel; Ultrasonic testing equipment;

    Sammanfattning : Classical fatigue models teach that there is an intrinsic fatigue limit for steels, representing a level of stress that is too low for regular crack growth where every cyclic load propagates a fatigue crack through the material. Modern application with extreme lifetimes has shown that fatigue will still take place in steels with stress levels well below the expected fatigue limit. LÄS MER

  3. 2. Would companies benefit from incorporating consumer generated ads in their marketing strategy?

    Master-uppsats, Uppsala universitet/Företagsekonomiska institutionen

    Författare :Dina Eriksson Renzi; Rebecka Leirup; [2021]
    Nyckelord :;

    Sammanfattning : Technological developments constantly change companies' marketing strategies and theoverall communication between companies and their customers. This has led to new forms ofmarketing such as user generated content (UGC) marketing. UGC has been proposed to beperceived as more trustworthy and authentic than traditional firm created content. LÄS MER

  4. 3. Ytinitierat utmattningsbrott vid mycket höga cykler : Utmattningsprovning med ultraljudsutrustning följt av karaktärisering av brottytor i ett svepelektronmikroskop av ett höghållfast stål

    Kandidat-uppsats, Karlstads universitet

    Författare :Ellinor Klippmark; [2018]
    Nyckelord :Utmattningsbrott; FGA; utmattningsprovning med ultraljudsutrustning; svepelektronmikroskop; FEM;

    Sammanfattning : I detta projekt analyseras utmattningsbrott orsakade av ytdefekter i höghållfast stål som utsätts för fler än tio miljoner cykliska belastningar. Vanligen orsakas utmattningsbrott i denna region av interna materialdefekter där brottytan ofta innehåller ett område med grövre morfologi - fine granular area (FGA). LÄS MER

  5. 4. Application of some modern analytical techniques for investigations of non-metallic inclusions in steel samples

    Master-uppsats, KTH/Materialvetenskap

    Författare :Wan Zhiyue; [2018]
    Nyckelord :Non-metallic Inclusions; Electrolytic Extraction; Fractional Gas Analysis; Zirconium Addition; Calcium Treatment;

    Sammanfattning : The non-metallic inclusions (NMI) have large influence on steel properties. Therefore, evaluation of inclusion size, number, composition and morphology by using modern analytical techniques are very important for control of steel production and steel quality. Three dimensional analysis method of electrolytic extraction is applied in this work. LÄS MER