Search for dissertations about: "fatigue crack growth"

Showing result 16 - 20 of 96 swedish dissertations containing the words fatigue crack growth.

  2. 16. Oxygen Induced High Temperature Crack Growth in Ni-base Superalloys

    Author : Leif Viskari; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Diffusion; Environmental influence; Crack growth; Atom probe tomography; Electron Microscopy; Deformation; Crack tip oxidation; Hold-time fatigue;

    Abstract : Oxygen induced crack growth is a serious concern for the performance of Ni-base superalloys. These alloys are used in gas-turbine engines where they are exposed to hightemperatures, mechanical loads and oxygen-rich environments. READ MORE

  4. 17. Fatigue strength of engineering materials : the influence of environment and porosity

    Author : Jan Linder; Bengt Lindberg; Lennart Josefsson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Stainless steel; cast aluminium; hardened steels; fatigue; corrosion; crack propagation; spot weld; porosity; Other materials science; Övrig teknisk materialvetenskap;

    Abstract : The objective of this work was to use LEFM in order to assess the detrimental influence of surrounding chloride-containing environments for stainless steels, hardened steel as well as for a cast aluminium alloy. An additional aim was also to use LEFM to assess the influence of porosity on the fatigue properties for different commercial cast aluminium alloys and manufacturing methods. READ MORE

  5. 18. Failure of Sandwich Structures with Sub-Interface Damage

    Author : Andrey Shipsha; KTH; []
    Keywords : sandwich structure; foam core; fatigue; crack growth; stress intensity factor; fatigue threshold; fracture toughness; damage tolerance; impact damage; crushed core; bridging; fracture analysis; point-stress criterion;

    Abstract : .... READ MORE

  6. 19. Fatigue crack growth under complex loading

    Author : Mats Yngvesson; KTH; []
    Keywords : ;

    Abstract : .... READ MORE

  7. 20. Thermo-mechanical Fatigue Crack Propagation in Inconel 718

    Author : Lars Jacobsson; Materialteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; crack closure; image analysis; potential drop; in-situ scanning elecron microscopy; crack propagation experiments; Thermo-mechanical fatigue; Inconel 718;

    Abstract : Thermo-mechanical fatigue crack propagation in Inconel 718 has been studied with different methods. In-situ observations with a scanning electron microscope (SEM) were performed, the crack propagation process was followed cycle by cycle and the influences from load, temperature, and microstructure on the crack growth were analyzed. READ MORE