Sökning: "Metallografi"

Visar resultat 11 - 13 av 13 uppsatser innehållade ordet Metallografi.

  1. 11. A study of "475°C embrittlement" in Fe-20Cr and Fe-20Cr-X (X=Ni, Cu, Mn) alloys

    Master-uppsats, KTH/Metallografi

    Författare :Fei Huyan; [2012]
    Nyckelord :ferrite decomposition; 475°C embrittlement; Atom Probe Tomography; Stainless steels;

    Sammanfattning : The “475°C embrittlement” occurring in ferritic and duplex stainless steel is considered to be detrimental and it limits the application of ferritic and duplex stainless steel at elevated temperatures, i.e., above about 300°C . LÄS MER

  3. 12. Spinodal Decomposition in the Binary Fe-Cr System

    Master-uppsats, KTH/Metallografi

    Författare :Saeed Baghsheikhi; [2009]
    Nyckelord :Fe-Cr binary system; phase diagram; miscibility gap; spinodal decomposition; nucleation and growth; hardness; TEM; contrast modulations;

    Sammanfattning : Spinodal decomposition is a phase separation mechanism within the miscibility gap. Its importance in case of Fe-Cr system, the basis of the whole stainless steel family, stems from a phenomenon known as the “475oC embrittlement” which results in a ruin of mechanical properties of ferritic, martensitic and duplex stainless steels. LÄS MER

  4. 13. Martensitic Transformation in Austenitic Stainless Steels

    Master-uppsats, KTH/Metallografi

    Författare :Reza Naraghi; [2009]
    Nyckelord :Stainless Steel; SEM; EBSD; α’-martensite; Ferritescope;

    Sammanfattning : Martensitic transformation is very important in austenitic stainless steels where the transformation induced plasticity phenomenon provides a combination of good mechanical properties, such as formability and strength. However, the difficulty of predicting the material behaviour is one of the major drawbacks of these steels. LÄS MER