Sökning: "Tempering"

Visar resultat 1 - 5 av 27 avhandlingar innehållade ordet Tempering.

  1. 1. Study of precipitation in martensitic Fe-C-Cr alloys during tempering Experiments and modelling

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Ziyong Hou; Joakim Odqvist; Andersson Jörgen; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fe-C-Cr alloy; Microstructure; Precipitates; Tempering of martensite; Electron microscopy; Modelling.; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : Understanding the precipitation reaction is very important since precipitation hardening is one of the most effective strengthening mechanisms in metallic alloys. In martensitic steels, a tempering heat treatment is often performed. LÄS MER

  2. 2. Effect of austenitising temperature and cooling rate on microstructures of hot-work tool steels

    Detta är en avhandling från Trollhättan : University West

    Författare :María Teresa Coll Ferrari; Leif Karlsson; Hans-Olof Andrén; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tool steel; Heat Treatment; Austenitising Temperature; Large Tools; Tempering Carbides; Bainitic Microstructures; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Sammanfattning : The average size of hot-work tools has gradually increased over the past years.This affects the effective temperature cycle tools experience during hardening,as large dimensions prevent uniform and rapid cooling, and thereby the resulting microstructures and properties. LÄS MER

  3. 3. Influence of thermal loading on mechanical properties of railway wheel steels

    Detta är en avhandling från Trollhättan : University West

    Författare :Krste Cvetkovski; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; contact creep.; rolling contact fatigue; martensite tempering; shear deformation; Railway wheel steels; heat treatment; residual stress; rapid heating; low cycle fatigue;

    Sammanfattning : Material integrity and properties of wheels are critical in railway traffic, as wheels fulfil the important function of transferring load and traction from the vehicle to the rail track. Steels with a pearlitic microstructure are commonly used for wheels due to their height strength, low cost and good wear properties. LÄS MER

  4. 4. Hydrophobicity Patterns in Protein Folding

    Detta är en avhandling från Complex Systems Group, Soelvegatan 14a, S 22362 Lund

    Författare :Frank Potthast; [1998]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; global optimization; multisequence; Fourier analysis; hydrophobicity; protein folding; simulated tempering; statistical physics; thermodynamics; Matematisk och allmän teoretisk fysik; kvantmekanik; klassisk mekanik; gravitation; relativitet; termodynamik; statistisk fysik; alpha-helix; protein design.; Mathematical and general theoretical physics; quantum mechanics; classical mechanics; relativity; Fysicumarkivet A:1998:Potthast;

    Sammanfattning : The protein folding problem is addressed focussing on the hydro- phobicity patterns in the amino acid sequences and structures. Both real and model proteins are investigated. The hydrophobicity pattern of real proteins is probed in two ways. First, it is asked which binary pattern is most conserved within groups of related proteins. LÄS MER

  5. 5. An experimental and theoretical study of precipitation during tempering of martensite in Fe-C-Cr alloys

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Ziyong Hou; Joakim Odqvist; Jörgen Andersson; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : .... LÄS MER