Sökning: "plastic zones"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden plastic zones.

  1. 1. Indentation effects in plastic zones

    Författare :Cecilia Eriksson; KTH; []
    Nyckelord :Hardness testing; Mechanical properties; Residual stress; Residual strain; Microindentation; Nanoindentation; Secondary indentation; Micro cracking; Strain Hardening; Pressure hardening; Pressure Sensitivity; AMF; FEM; Brittle materials;

    Sammanfattning : .... LÄS MER

  2. 2. Plastic Deformation of Duplex Stainless Steel

    Författare :Magnus Nyström; Chalmers University of Technology; []
    Nyckelord :stainless steel; microstructure; plastic zones; impact toughness; anisotropy; prestraining; annealing; fractography; fatigue;

    Sammanfattning : Duplex austenitic/ferritic stainless steels are increasingly used as an alternative to conventional austenitic grades. Main advantages of the duplex grades are good resistance to corrosion cracking and corrosion fatigue in environments that contain chloride. LÄS MER

  3. 3. Dynamic neck formation in elastic-plastic tensile bars

    Författare :Kristina Nilsson; Mekanik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dynamic loading; necking; inertia; localization zones; numerical simulation; finite elements; non-linear;

    Sammanfattning : The time development of neck formation in ductile elastic-plastic bars is analyzed numerically in order to obtain a qualitative description of the features of dynamic neck localization under impact conditions. The full time history is visualized using contour plots of the time development of a strain rate parameter. LÄS MER

  4. 4. Microstructure and plastic deformation of textured CVD alumina coatings

    Författare :Siamak Shoja; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; α-Al2O3; Texture; Coatings; TKD; Plastic deformation; Deformation mechanisms; Electron microscopy; CVD;

    Sammanfattning : It is known that the wear performance of α-alumina coatings produced by chemical vapor deposition (CVD) is significantly influenced by the type and degree of texture. However, the main reasons behind this behavior are not fully understood. This thesis contains studies of two related topics for increasing the understanding of α-alumina coatings. LÄS MER

  5. 5. The Influence of Residual Stresses on Constant and Variable Amplitude Fatigue Behaviour of Steel

    Författare :Kamellia Dalaei; Chalmers University of Technology; []
    Nyckelord :Steel; Relaxation; Residual stress; Variable Amplitude; Shot peening; Fatigue;

    Sammanfattning : Subjected to dynamic loading, truck components are exposed to variable amplitude fatigue. The fatigue life of components is to a large degree controlled by the behaviour of the surface zones. LÄS MER