Sökning: "Electron backscattered diffraction"

Hittade 4 uppsatser innehållade orden Electron backscattered diffraction.

  1. 1. EBSD Investigation of High-Temperature Magnetite from Apatite-Iron-Oxide Deposits: Implications for the Formation of Giant Kiruna-Type Deposits

    Master-uppsats, Uppsala universitet/Mineralogi, petrologi och tektonik

    Författare :Jens Henriksson; [2022]
    Nyckelord :Kiruna-type deposit; electron backscattered diffraction; crystal settling; Fe-O systematics; crystal alignment;

    Sammanfattning : European iron production is to a large extent dependant on massive Kiruna type apatite-iron ore deposits. In this contribution, high-temperature magnetite samples from apatite-iron-oxide deposits are investigated by means of Electron Backscattered Diffraction. However, the origin of Kiruna-type deposits is still unresolved. LÄS MER

  3. 2. Effect of carbon activity on microstructure evolution in WC-Ni cemented carbides

    Master-uppsats, KTH/Materialvetenskap

    Författare :Olivia Danielsson; [2018]
    Nyckelord :Cemented carbides; Hard metal; WC-Ni; Tungsten carbide; Nickel binder; Grain coarsening; Grain growth; Carbon activity; Size distribution; EBSD; Electron backscattered diffraction;

    Sammanfattning : The aim of this work was to systematically study how the microstructure evolution is affected by the carbon activity in WC-Ni cemented carbides. Seven WC-9.59at%Ni alloys with different carbon activity were sintered at 1500 °C. LÄS MER

  4. 3. Experimental Methodologies for Analyzing Austenite Recrystallization in Martensitic Tool Steels

    Master-uppsats, KTH/Materialvetenskap

    Författare :Robin Nilsson; [2015]
    Nyckelord :Tool steels; Recrystallization; Prior austenite grain boundaries; Martensite; EBSD; Chemical etching; Thermal etching;

    Sammanfattning : Revealing the prior austenite grain boundaries from a martensitic structure is well known to be very difficult and dependent on the chemical composition and the thermomechanical processing of the steel. In the present study, four different chemical etching reagents and additional thermal etching have been conducted for thermomechanical simulated tool steels Orvar Supreme and Stavax ESR. LÄS MER

  5. 4. Evaluation of the η (Eta) nitride with three laboratory melts

    Magister-uppsats, KTH/Materialvetenskap

    Författare :Martin Lind; Cecilia Johansson; [2015]
    Nyckelord :η Eta nitride; high nitrogen; aging; equilibrium condition; precipitations; nitrides; π Pi nitride; High Temperature Austenitic Stainless Steel; η Eta nitrid; hög kvävehalt; åldring; jämviktstillstånd; utskiljningar; nitrider; π Pi nitrid; austenitiska rostfria högtemperaturstål;

    Sammanfattning : η (eta) nitride, Cr3Ni2SiN, is a precipitate found in high temperature austenitic stainless steel and is not yet included in Thermo-Calc steel database TCFE7. The aim of this thesis is to collect thermodynamic data to enable the addition of η nitride in the databases. LÄS MER