Sökning: "superlegeringar"

Visar resultat 1 - 5 av 7 avhandlingar innehållade ordet superlegeringar.

  1. 1. Processability of Laser Powder Bed Fusion of Alloy 247LC-Influence of process parameters on microstructure and defects

    Författare :Olutayo Adegoke; Joel Andersson; Robert Pederson; Moataz Attallah; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Laser powder bed fusion; Alloy 247LC; additive manufacturing; nickel-based superalloys; processability; cracks; voids; Laserpulverbäddssmältning; legering 247LC; additiv tillverkning; superlegeringar; processbarhet; sprickor; porositet.; Production Technology; Produktionsteknik;

    Sammanfattning : This thesis is about laser powder bed fusion (L-PBF) of the nickel-basedsuperalloy Alloy 247LC. Alloy 247LC is mainly used in gas turbine blades and processing the blades with L-PBF may confer performance advantage over the blades manufactured with conventional methods. LÄS MER

  3. 2. Aspects of Crack Growth in Single-Crystal Nickel-Base Superalloys

    Författare :Christian Busse; Daniel Leidermark; Kjell Simonsson; Johan Moverare; David Gustafsson; Björn Sjödin; Louis J. Ghosn; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This Licentiate of Engineering thesis is a product of the results generated in the research project KME-702, which comprises modelling, microstructure investigations and material testing of cast nickel-base superalloys.The main objective of this work is to model the fatigue crack propagation behaviour in single-crystal nickel-base superalloys. LÄS MER

  4. 3. Crack growth in single crystal gas turbine blade alloys under service-like conditions

    Författare :Frans Palmert; Johan Moverare; David Gustafsson; Mikael Segersäll; Philippa A.S. Reed; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Single crystal superalloy; TMF; Crack growth; Crystallographic crack growth; Aging; Hold time; Creep crack growth;

    Sammanfattning : This work concerns the fatigue crack growth behaviour of nickel base single crystal superalloys. The main industrial application of this class of materials is in gas turbine blades, where the ability to withstand severe mechanical loading in combination with high temperatures is required. LÄS MER

  5. 4. Creep modeling and first-principles investigation of high-temperature alloys

    Författare :Jing Zhang; Pavel A. Korzhavyi; Rolf Sandström; Gunther Eggeler; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Austenitic stainless steels; Nickel-based superalloys; Fundamental creep models; EMTO-CPA method; Quasi-harmonic Debye model; Thermo-mechanical properties; High temperatures.; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Stainless steels and nickel-based superalloys are materials that have been widely used to manufacture components servicing at high temperatures. Creep strength is one of the most important properties in such conditions. LÄS MER

  7. 5. High Temperature Fatigue Behaviour of Austenitic Stainless Steel : Microstructural Evolution during Dwell-Fatigue and Thermomechanical Fatigue

    Författare :Hugo Wärner; Mattias Calmunger; Johan Moverare; Guocai Chai; Sten Johansson; Martina Zimmermann; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The global energy consumption is increasing and together with global warming from greenhouse gas emission, a need for more environmentally friendly energy production processes is created. Higher efficiency of biomass power plants can be achieved by increasing temperature and pressure in the boiler section, this would increase the generation of electricity along with the reduction in emission of greenhouse gases e. LÄS MER