Sökning: "Superalloy"

Visar resultat 36 - 40 av 75 avhandlingar innehållade ordet Superalloy.

  1. 36. Diffusion bonding of structural ceramics to superalloys by HIP

    Författare :Richard Larker; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materialteknik; Engineering Materials;

    Sammanfattning : Diffusion bonding of structural ceramics to superalloys has been investigated. Emphasis was placed on methods resulting in joints durable at elevated temperatures (500 - 700ºC) between these two classes of high - temperature materials. LÄS MER

  3. 37. High temperature fatigue crack propagation behaviour of Inconel 718

    Författare :David Gustafsson; Kjell Simonsson; Johan Moverare; Sören Sjöström; Ulrich Krupp; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : The overall objective of this work has been to develop and evaluate tools for designing against fatigue in gas turbine applications, with special focus on the nickel-based superalloy Inconel 718. The fatigue crack propagation behaviour under high temperature hold times has been studied. LÄS MER

  4. 38. Inconel 718 and Hydrogen

    Författare :Niklas Ehrlin; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; IN718 Hydrogen Embrittlement Cathodic Charging;

    Sammanfattning : The nickel based superalloy IN718 is known to be sensitive to hydrogen, causing degradation of its mechanical properties. The degrading mechanism commonly proposed is based on an increased mobility and density of dislocations, caused by the dissolved hydrogen. This results in a decreased yield stress and a premature fracture. LÄS MER

  5. 39. Deformation mechanisms and load distribution in multi-phase engineering materials

    Författare :Nitesh Raj Jaladurgam; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Deformation mechanisms; Electron microscopy; Eutectic high entropy alloys; Load distribution; Superalloys; In-situ neutron diffraction;

    Sammanfattning : While the transition to carbon neutral technologies is still in progress, it is vital to reduce the environmental impact of existing processes. The efficiency of combustion processes for e.g. power generation and aviation can be greatly improved by increasing the operating temperature. LÄS MER

  7. 40. Constitutive and fatigue crack propagation behaviour of Inconel 718

    Författare :David Gustafsson; Kjell Simonsson; Johan Moverare; Sjöström Sören; Sten Johansson; Christer Persson; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nickel-base superalloys constitutive modelling mean stress relaxation fatigue crack propagation hold times grain boundary embrittlement;

    Sammanfattning : In this licentiate thesis the work done in the TURBO POWER project Influence of high temperature hold times on the fatigue life of nickel-based superalloys will be presented. The overall objective of this project is to develop and evaluate tools for designing against fatigue in gas turbine applications, with special focus on the nickel-based superalloy Inconel 718. LÄS MER