Sökning: "EFTEM"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet EFTEM.

  1. 1. Aspects of microstructural evolution in chromium steels in high temperature applications

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :Åsa Gustafson; KTH.; [2000]
    Nyckelord :Cr-steels; nucleation; coarsening; model; DICTRA; precipitates; carbides; carbo-nitrides; MX; VN; M23C6; TiC; TEM; EFTEM; Curie-temperature;

    Sammanfattning : In this thesis 9-12 % Cr steels, used for high-temperaturecomponents in fossil-fired power plants are considered. Thecreep strength of thees steels depend on their microstructurethat consists of a matrix of tempered lath martensite withdensely distributed precipitates. LÄS MER

  2. 2. Mechanisms of Plastic Deformation of Cemented Carbide and Cermet Cutting Tools

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :Gustaf Östberg; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SEM; cermets; TEM; plastic deformation; ab initio calculations; EFTEM; APFIM; FIB; cemented carbides; EBSD;

    Sammanfattning : In this thesis, the physical mechanisms acting during plastic deformation of hardmetals used in metal cutting applications have been investigated. Microstructural and microanalytical studies have been performed on cemented carbides as well as cermet materials. LÄS MER

  3. 3. Microstructure of a cubic boron nitride tool material before and after hard turning

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :Jenny Angseryd; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EELS; cBN; microstructure; PCBN; adherent layer; EDX; wear; SEM; EFTEM; TEM;

    Sammanfattning : AbstractPolycrystalline cubic boron nitride (PCBN) materials are widely used in turning of hardened steels due to their beneficial mechanical properties like high hardness at elevated temperatures and, compared to diamond, for being more chemically stable towards iron at temperatures typical for turning operations (800-1000˚C). The wear of PCBN tools is influenced by several factors, like machining parameters, different tool geometries and varying composition of PCBN tools as well as workpiece material. LÄS MER

  4. 4. Understanding the Role of Molybdenum on the Precipitation in PH Stainless Steels

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :MARCUS ANDERSSON; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silicon; Precipitation; ageing; EFTEM; molybdenum; atom probe.; martensitic PH stainless steel;

    Sammanfattning : The main part of the present work concerns studies of the influence of molybdenum on the microstructure of martensitic PH stainless steels, during ageing at 475°C. A short investigation of the silicon impact has also been conducted. LÄS MER

  5. 5. Precipitate growth and coarsening in creep resistant chromium steels

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :Ardeshir Golpayegani; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; coarsening; 9-12% chromium steel; growth; APFIM; energy filtered TEM; Boron; precipitates; atom probe field ion microscopy; EFTEM;

    Sammanfattning : .... LÄS MER