Sökning: "Dynamic recrystallization"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Dynamic recrystallization.

  1. 1. 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

  2. 2. Modeling the microstructural evolution during hot working of C-Mn and Nb microalloyed steels using a physically based model

    Detta är en avhandling från Stockholm : KTH

    Författare :Linda Lissel; KTH.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; austenite; modeling; hot deformation; microstructure evolution; static recrystallization; dynamic recrystallization; metadynamic recrystallization; TECHNOLOGY Materials science Other materials science; TEKNIKVETENSKAP Teknisk materialvetenskap Övrig teknisk materialvetenskap;

    Sammanfattning : Recrystallization kinetics, during and after hot deformation, has been investigated for decades. From these investigations several equations have been derived for describing it. The equations are often empirical or semi-empirical, i.e. LÄS MER

  3. 3. Modeling the microstructural evolution during hot working of C-Mn and of Nb microalloyed steels using a physically based model

    Detta är en avhandling från Stockholm : Royal Institute of Technology, School of Industrial Engineering and Management, Material Science and Engineering, Division of mechanical Metallurgy

    Författare :Linda Lissel; [2006]
    Nyckelord :austenite; modeling; hot deformation; microstructure; evolution; static recrystallization; dynamic recrystallization; metadynamic recrystallization; Modellering av mikrostrukturutvecklingen hos mikrolegerade stål under varmdeformation;

    Sammanfattning : Recrystallization kinetics, during and after hot deformation, has been investigated for decades. From these investigations several equations have been derived for describing it. The equations are often empirical or semi-empirical, i.e. LÄS MER

  4. 4. Modeling the Microstructural Evolution during Hot Deformation of Microalloyed Steels

    Detta är en avhandling från Stockholm : KTH

    Författare :Linda Bäcke; KTH.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modeling; austenite; microalloyed steels; hot deformation; microstructure evolution; static recrystallization; dynamic recrystallization; metadynamic recrystallization<; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap;

    Sammanfattning :  This thesis contains the development of a physically-based model describing the microstructural evolution during hot deformation of microalloyed steels. The work is mainly focused on the recrystallization kinetics. During hot rolling, the repeated deformation and recrystallization provides progressively refined recrystallized grains. LÄS MER

  5. 5. White Layer Formation during Hard Turning of Through-Hardened Martensitic and Bainitic AISI 52100 Steel

    Detta är en avhandling från Stockholm : KTH

    Författare :Seyed Hosseini; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; white layers; residual stresses; phase transformation; dynamic recovery; bainite; dynamic recrystallization; carbide deformation; retained austenite; steel; martensite;

    Sammanfattning : Increased demands for flexible manufacturing lines, shorter cycle times and reduced impact on the environment drives the need for optimization of today’s manufacturing. For machining of hardened steel parts (>45 HRC), grinding has been the obvious choice for many decades. However, hard turning has often been considered as a replacement due to e. LÄS MER