Sökning: "Crystal plasticity"

Visar resultat 21 - 25 av 26 avhandlingar innehållade orden Crystal plasticity.

  1. 21. Modeling of structural integrity of aged low alloy steels using non-local mechanics

    Författare :Magnus Boåsen; Pål Efsing; Jacques Besson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : Ageing of low alloy steels affects the structural integrity assessment as it most commonly causes embrittlement and a hardening of the material. This is due to theevolution of the microstructure during operation in the specific application. LÄS MER

  3. 22. Modelling 3D-woven composites on the macroscale: Predicting damage initiation and inelastic phenomena

    Författare :Carolyn Oddy; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 3D-woven composites; Anisotropy; Inelasticity; Damage initiation;

    Sammanfattning : Composites with 3D-woven reinforcement have been slowly making their way into different industries. The interlacement of yarns, not only in-plane but also through-thickness, means that in many applications 3D-woven composites can outperform their laminated counterparts. LÄS MER

  4. 23. Phase change with stress effects and flow

    Författare :Amer Malik; Gustav Amberg; Long-Qing Chen; KTH; []
    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

  5. 24. Defects in Austenitic Steels and Hard Metals - A DFT-based Study

    Författare :Ruiwen Xie; Levente Vitos; Ilja Turek; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; defects; austenitic steels; cemented carbides; ab-initio; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Materials are never 100% pure due to the limitation of purification method or manufacturing process. Nor are they perfect, especially under deformation. The present work aims to explore different roles played by the defects in austenitic steels and hard metals. LÄS MER

  7. 25. Theoretical description of Ti and Ti alloys from first principles

    Författare :Natalia Skripnyak; Igor Abrikosov; Iryna Yakimenko; Sergey Simak; Zi-Kui Liu; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; T; Ti alloys; DFT; molecular dynamics; thermodynamic properties; elastic properties;

    Sammanfattning : Modern world is known for many advanced technologies and solutions to complex problems. Technical progress runs at high speed. In order to most effectively use materials, given to us by Nature, it is important to know their properties. To do laboratory experiments is often too expensive and time consuming. LÄS MER