Search for dissertations about: "Superalloy"

Showing result 16 - 20 of 74 swedish dissertations containing the word Superalloy.

  2. 16. Modelling of constitutive and fatigue behaviour of a single-crystal nickel-base superalloy

    Author : Daniel Leidermark; Kjell Simonsson; Johan Moverare; Sören Sjöström; Roger C. Reed; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Single-crystal nickel-base superalloys; crystal plasticity; tension compression asymmetry; rafting; fatigue initiation; critical plane approach; Engineering mechanics; Teknisk mekanik;

    Abstract : In this licentiate thesis the work done in the project KME410 will be presented. The overall objective of this project is to evaluate and develop tools for designing against fatigue in single-crystal nickel-base superalloys in gas turbines. READ MORE

  4. 17. Near-surface residual stresses and microstructural changes after turning of a nickel-based superalloy

    Author : Christian Schlauer; Linköpings universitet; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Nickel-based superalloys are precipitation hardened alloys with complex compositions. They are used in aircraft engines and land-based gas turbines in load-bearing structural components that are exposed to high temperatures. Failure mechanisms in this environment are high and low cycle fatigue, creep, and corrosion. READ MORE

  5. 18. Modelling and experimental evaluation of non-linear fatigue crack propagation in a ductile superalloy

    Author : Daniel Ewest; Per Almroth; Kjell Simonsson; Björn Sjödin; Daniel Leidermark; Sören Sjöström; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Fatigue life evaluation is an important part in the design process of an industrial gas turbine. The fatigue life can be divided into crack initiation and crack propagation, and not to address the crack propagation part usually yields a non-conservative and overcomplicated design. READ MORE

  6. 19. Alloy Design and Characterization of γ′ Strengthened Nickel-based Superalloys for Additive Manufacturing

    Author : Jinghao Xu; Johan Moverare; Ru Lin Peng; Eric Jägle; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nickel-based superalloy; Alloy design; Laser powder bed fusion; Cracking susceptibility; Additive manufacturability; Heat treatment; γ′ precipitate; High-temperature mechanical property; Creep.;

    Abstract : Nickel-based superalloys, an alloy system bases on nickel as the matrix element with the addition of up to 10 more alloying elements including chromium, aluminum, cobalt, tungsten, molybdenum, titanium, and so on. Through the development and improvement of nickel-based superalloys in the past century, they are well proved to show excellent performance at the elevated service temperature. READ MORE

  7. 20. High-performance Nickel-based Superalloys for Additive Manufacturing

    Author : Jinghao Xu; Johan Moverare; Ru Peng; Chinnapat Panwisawas; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nickel-based superalloy; Alloy design; Laser powder bed fusion; Cracking susceptibility; Additive manufacturability; Heat treatment; γ′ precipitate; High-temperature mechanical property; Creep; Oxidation;

    Abstract : Additive manufacturing (AM), e.g., laser powder bed fusion (LPBF) technique, has become a powerful manufacturing process for producing metallic components with the advantages of design freedom, net-shape-forming flexibility, product customization, and reduced lead time to market. READ MORE