Sökning: "polycrystal"

Visar resultat 1 - 5 av 6 avhandlingar innehållade ordet polycrystal.

  1. 1. Phase change with stress effects and flow

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

    Författare :Amer Malik; KTH.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Martensitic transformation; phase-field method; polycrystal; stress-effects; microactuator; finite-element simulations.;

    Sammanfattning : In this thesis two kinds of phase change i.e., solid state phase transformation in steels and solid-to-liquid phase transformation in paraffin, have been modeled and numerically simulated. LÄS MER

  2. 2. Efficient crystal plasticity simulations of microstructure evolution

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

    Författare :Ylva Mellbin; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : One of the common tools for studying the deformation behavior of the microstructure in polycrystalline materials is crystal plasticity models. These are used to describe texture evolution and hardening due to crystallographic slip. LÄS MER

  3. 3. Computational modeling of polycrystals using gradient crystal plasticity

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

    Författare :Mikkel Grymer; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; parallel algorithms; crystal plasticity; dual mixed finite element method; gradient hardening; grain modeling;

    Sammanfattning : This thesis treats the modeling of grain size dependence inmicrostructure models of metals. It is shown how gradient hardening, in a thermodynamically consistent fashion, can be included into a crystal plasticity model, which is used as the constitutive model in each grain of the polycrystal. LÄS MER

  4. 4. Zirconia as a biomaterial for odontological applications effects of composition and manufacturing processes on fracture resistance

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Anders Sundh; Umeå universitet.; [2010]
    Nyckelord :CAD CAM; ceramics; HIPing; Mg-PSZ; veneering; Y-TZP; zirconia;

    Sammanfattning : Background: Ceramics have long been amongst the most biocompatible materials known but their mechanical properties have limited their use. During the past few decades zirconia has aroused particular interest as a biomaterial because of its greater flexural strength, fracture resistance and toughness compared to other bioceramics. LÄS MER

  5. 5. 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