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Showing result 1 - 5 of 8 essays matching the above criteria.

  1. 1. Optimization of the process-route of a Nickel-base alloy : Investigation of Sigma-phase precipitation in heat treatment

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Felix Andersson; [2023]
    Keywords : Sigma-phase; austenitic stainless steel; Nickel-base alloy; heat treatment; Sigmafas; austenitiskt rostfritt stål; Nickelbas legering; värmebehandling;

    Abstract : The focus of this master’s thesis is on the heat treatment of Ni-base alloys, specifically the risk of intermetallic σ-phases during different stages of heat treatment. The alloy studied is Sanicro®28, a super-austenitic stainless steel produced by Alleima AB. READ MORE

  3. 2. Understanding the effect of temperature and time on Gamma prime coarsening for Nickel-base superalloy Haynes 282

    University essay from KTH/Materialvetenskap

    Author : Kevin Vattappara; [2019]
    Keywords : Haynes 282; gamma prime 𝛾′ ; Arc-heat treatment; COMSOL modelling; isothermal transformation; coarsening; Thermo-Calc simulations;

    Abstract : Haynes 282 is a gamma prime (𝛾′)-strengthened nickel base superalloy developed in 2005, exhibiting a good combination of high temperature properties and fabricability. Microstructural features such as 𝛾′ and carbides play an important role in deriving the mechanical properties of the alloy during heat treatment. READ MORE

  4. 3. Thermo-mechanical fatigue crack propagation in a single-crystal turbine blade

    University essay from Linköpings universitet/Mekanik och hållfasthetslära

    Author : Andreas Koernig; Nicke Andersson; [2016]
    Keywords : Thermo-mechanical fatigue; crack propagation; single-crystal; turbine blade; FRANC3D;

    Abstract : Simulation of crack growth in the internal cooling system of a blade in a Siemens gas turbine has been studied by inserting and propagating cracks at appropriate locations. The softwares used are ABAQUS and FRANC3D, where the latter supports finite element meshing of a crack and calculation of the stress intensities along the crack front based on the results from an external finite element program. READ MORE

  5. 4. Effect of tungsten carbides properties of overlay welded WC/NiSiB composite coatings

    University essay from KTH/Industriell produktion

    Author : Richard Seger; [2014]
    Keywords : ;

    Abstract : To get a long life of a product which is subjected to heavy mechanical wear, materials with particularly good properties such as high hardness and the ability to resist high temperature is required. Tungsten carbide is a material which has these properties, but to manufacture large products for mining industry or agriculture entirely of this material is neither practical nor quite beneficial when the disadvantages of the materials such as brittleness, high weight and high price will have a major affect. READ MORE

  6. 5. Effect of temperature on mechanical response of austenitic materials

    University essay from Konstruktionsmaterial

    Author : Mattias Calmunger; [2011]
    Keywords : Dynamic strain aging; biomass power plant; austenitic stainless steel; nickel base alloy; stacking fault energy; twins;

    Abstract : Global increase in energy consumption and global warming require more energy production but less CO2emission. Increase in efficiency of energy production is an effective way for this purpose. This can be reached by increasing boiler temperature and pressure in a biomass power plant. READ MORE