Sökning: "M23C6"

Hittade 5 uppsatser innehållade ordet M23C6.

  1. 1. Investigation of Ductility Dip at 1000˚C in Alloy 617

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Julia Sjöström; Helena Åkesson; [2017]
    Nyckelord :Ductility dip cracking; Ni-based alloy; tortuous grain boundaries; intergranular precipitates; grain boundary migration; superalloy; M23C6; Ti N; C ; solid state cracking; dynamic recrystallization;

    Sammanfattning : Alloy 617 displays a ductility dip during straining at exactly 1000˚C, leading to brittle fracture. A sudden decrease in ductility appearing during Gleeble hot ductility tests of Ni-based superalloys is a well-known phenomenon, while its cause is unknown. LÄS MER

  3. 2. Precipitation Study in a High Temperature Austenitic Stainless Steel using Low Voltage Energy Dispersive X-ray Spectroscopy

    Master-uppsats, KTH/Materialens processteknologi

    Författare :Ali Gharehbaghi; [2012]
    Nyckelord :austenitic stainles steel; precipitation; EDS; low voltage EDS; micron-scale precipitates; sub-micron intragranular precipitates;

    Sammanfattning : Precipitation of second phase particles is a key factor dominating the mechanical properties of high temperature alloys. In order to control and optimize the precipitation effect it is of great importance to study the role of alloying elements in the formation and stability of precipitates. LÄS MER

  4. 3. Precipitation Study in a High Temperature Austenitic Stainless Steel using Low Voltage Energy Dispersive X-ray Spectroscopy

    Master-uppsats, KTH/Materialens processteknologi

    Författare :Ali Gharehbaghi; [2012]
    Nyckelord :austenitic stainles steel; precipitation; EDS; low voltage EDS; micron-scale precipitates; sub-micron intragranular precipitates;

    Sammanfattning : Precipitation of second phase particles is a key factor dominating the mechanical properties of high temperature alloys. In order to control and optimize the precipitation effect it is of great importance to study the role of alloying elements in the formation and stability of precipitates. LÄS MER

  5. 4. Equilibrium studies in the Co-Cr-C system : Solubility of Cobalt in M23C6 and M3C2

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Karin Ekström; Shanar Kordbache; [2011]
    Nyckelord :;

    Sammanfattning : This project concerns cemented carbides and the carbides that are formed when adding chromium. Cemented carbides are composites, often consisting of tungsten-carbide particles embedded in a cobalt-rich matrix, and are because of their extreme hardness used in for example cutting tools and drills. LÄS MER

  7. 5. Oxidation and degradation of nickel-base alloys at high temperatures

    Uppsats för yrkesexamina på grundnivå, KTH/Materialvetenskap

    Författare :Frans Palmert; [2009]
    Nyckelord :oxidation; nickel; nickel-base; superalloy; PWA1483; IN792; turbine; cyclic; spalling; hardness; gamma prime; coarsening; degradation; microstructure;

    Sammanfattning : This master’s thesis work is a study of oxidation and degradation of nickel-base alloys at high temperatures. The materials studied are designed for use in critical gas turbine components such as turbine blades and vanes. Some of the alloys are used today, whereas others have not yet entered commercial application. LÄS MER