Sökning: "Particle strengthening"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Particle strengthening.

  1. 1. Creep modelling of particle strengthened steels

    Detta är en avhandling från Stockholm : KTH

    Författare :Hans Magnusson; KTH.; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Particle strengthening; dislocation climb; ferritic steels; dislocation evolution; creep rate modelling; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap;

    Sammanfattning : Materials to be used in thermal power plants have to resist creep deformation for time periods up to 30 years. The role of alloying elements for creep strength of 9-12% Cr steels is analysed. The creep strength in these steels relies on minor additions of alloying elements. LÄS MER

  2. 2. Creep modelling of particle strengthened steels

    Detta är en avhandling från Stockholm : KTH

    Författare :Hans Magnusson; KTH.; KTH.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; creep rate modelling; particle hardening; microstructure evolution; dislocation climb; ferritic steels; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap;

    Sammanfattning : Materials used in thermal power plants have to resist creep deformation for time periods up to 30 years. Material evaluation is typically based on creep testing with a maximum duration of a few years. This information is used as input when empirically deriving models for creep. LÄS MER

  3. 3. Multiscale modeling of dynamic recrystallization

    Detta är en avhandling från Avd för Hållfasthetslära, Box 118, 221 00 Lund

    Författare :Ylva Mellbin; Lunds universitet.; Lund University.; [2016-09-16]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dynamic recrystallization; Crystal plasticity; Texture; Grain size strengthening; Vertex model; Nucleation; Particle pinning; Large deformations; Multiscale modeling; GPGPU;

    Sammanfattning : During thermomechanical processing of metals, changes occur in the microstructure of the material which affect its macroscopic properties. By understanding these transformations in the microstructure, it becomes possible to design the processes in a way which yields the desired properties in the finished product. LÄS MER

  4. 4. Exploring particle physics beyond the Standard Model

    Detta är en avhandling från Stockholm University

    Författare :Sebastian Baum; Stockholms universitet.; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Theoretical Physics; teoretisk fysik;

    Sammanfattning : The standard model of particle physics (SM) is arguably the best tested theory of physics, providing an accurate description of virtually all high energy particle physics phenomena observable in the laboratory. However, the SM also has a number of shortcomings: some of more theoretical nature such as the fine-tuning problem of the Higgs or the strong-CP problem, and some of more phenomenological nature such as not allowing for a satisfying implementation of neutrino masses and the lack of a suitable candidate for the observed dark matter of the Universe. LÄS MER

  5. 5. Thermodynamic and kinetic investigation of systems related to lightweight steels

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Weisen Zheng; KTH.; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fe-Mn-Al-C; CALPHAD; MGI; ICME; Precipitation strengthening; Lightweight steels.; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : Lightweight steels have attracted considerable interest for automobile applications due to the weight reduction without loss of high strength and with retained excellent plasticity. In austenitic Fe-Mn-Al-C steels, the nano-precipitation of the κ-carbide within the austenitic matrix significantly contributes to the increase in yield strength. LÄS MER