Search for dissertations about: "Creep behavior"

Showing result 1 - 5 of 32 swedish dissertations containing the words Creep behavior.

  2. 1. Creep Behavior of High Temperature Cast Materials for Exhaust Applications

    Author : Christian Öberg; Stefan Jonsson; Baohua Zhu; John Hald; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Creep; creep behaviour; creep damage; ductile cast iron; high-alloyed austenitic cast steel; thermal cycling; tensile testing; stress relaxation; oxidation; precipitation.; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : This thesis focuses on creep of four cast materials intended for exhaust manifolds in heavy-duty truck engines. Two of the materials are ferritic ductile cast irons, SiMo51 and SiMo1000, one is an austenitic ductile cast iron, D5S, and another one is an austenitic cast steel, HK30. READ MORE

  4. 2. High temperature performance of materials for future power plants

    Author : Junjing He; Pavel Korzhavyi; Rolf Sandström; Stefano Spigarelli; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Austenitic stainless steels; Nickel based superalloys; Low cycle fatigue; Creep-fatigue; Creep cavitation; Grain boundary sliding; Cavity nucleation; Cavity growth; Creep rupture strength; Advanced ultra-supercritical power plants.; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : Increasing energy demand leads to two crucial problems for the whole society. One is the economic cost and the other is the pollution of the environment, especially CO2 emissions. Despite efforts to adopt renewable energy sources, fossil fuels will continue to dominate. READ MORE

  5. 3. Nonlinear Creep Model of Paper and Corrugated Board Materials

    Author : Poorvi Patel; Teknisk logistik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Technological sciences; Finite element modeling; Creep-recovery tests; Schapery creep equation; Localbuckling; Orthotropic materials; Teknik;

    Abstract : Models of the nonlinear creep behavior of paper, and of the global buckling , local buckling and creep buckling of corrugated board have been developed. The studies of creep and buckling were limited to climate conditions with constant relative humidity. First the short-term elastic buckling of corrugated board panels was studied. READ MORE

  6. 4. Anisotropic mechanical behaviors and microstructural evolution of thin-walled additively manufactured metals

    Author : Cheng-Han Yu; Johan Moverare; Ru Lin Peng; Joe Kelleher; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hot tensile testing; slow strain rate tensile testing; creep; anisotropy; crystallographic texture evolution; deformation twinning; Varmdragprov; Dragprov med låg töjningshastighet; kryp; anisotropi; kristallografisk textur; deformationstvillingar;

    Abstract : Additive manufacturing (AM), also known as 3D printing, is a concept and method of a manufacturing process that builds a three-dimensional object layer-by-layer. Opposite to the conventional subtractive manufacturing, it conquers various limitations on component design freedom and raises interest in various fields, including aerospace, automotive and medical applications. READ MORE

  7. 5. Modeling defect structure evolution in spent nuclear fuel container materials

    Author : Arash Hosseinzadeh Delandar; Pavel Korzhavyi; Rolf Sandström; Konstantin Khromov; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cast iron insert; First principles calculations; Point defects; Effective interaction energy; Late blooming phase; Dislocation dynamics; High strain rate deformation; Single-crystal copper; Copper canister; Creep; Glide; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : Materials intended for disposal of spent nuclear fuel require a particular combination of physical and chemical properties. The driving forces and mechanisms underlying the material’s behavior must be scientifically understood in order to enable modeling at the relevant time- and length-scales. READ MORE