Search for dissertations about: "deformation mechanisms"

Showing result 1 - 5 of 175 swedish dissertations containing the words deformation mechanisms.

  1. 1. Deformation behaviour and chemical signatures of anorthosites: : Examples from southern West Greenland and south-central Sweden

    Author : Henrik Svahnberg; Sandra Piazolo; Anders Scherstén; Holger Stünitz; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; anorthosite; plagioclase; deformation; strain localisation; fluid-rock interaction; electron backscatter diffraction EBSD ; Solid earth geology and petrology; Berggrundsgeologi och petrologi; Mineralogy; Petrology and Geochemistry; mineralogi; petrologi och geokemi;

    Abstract : Plagioclase is the most abundant mineral in the lower crust and it is thus important to constrain the behaviour of plagioclase during deformation. Anorthosites, which are plagioclase-rich rocks, are common in Archaean cratons but their origin and rheological importance is still debated. READ MORE

  2. 2. Mechanisms of Plastic Deformation of Cemented Carbide and Cermet Cutting Tools

    Author : Gustaf Östberg; Chalmers University of Technology; []
    Keywords : SEM; cermets; TEM; plastic deformation; ab initio calculations; EFTEM; APFIM; FIB; cemented carbides; EBSD;

    Abstract : In this thesis, the physical mechanisms acting during plastic deformation of hardmetals used in metal cutting applications have been investigated. Microstructural and microanalytical studies have been performed on cemented carbides as well as cermet materials. READ MORE

  3. 3. Heterogeneous deformation of multi-phase engineering materials - an in-situ neutron diffraction study

    Author : Nitesh Raj Jaladurgam; Chalmers University of Technology; []
    Keywords : Eutectic high entropy alloys; in-situ neutron diffraction; Deformation mechanisms; Superalloys; Electron microscopy;

    Abstract : Gas turbines are complex power generation systems used in aerospace or land-based-power stations. Materials such as Ni-base superalloys are involved in the combustion zone of these machines, which continuously experiences harsh environments with loading at high temperatures. READ MORE

  4. 4. Microstructural changes in high strength steels exposed to large deformation and high strain rates

    Author : Kristina Ryttberg; Chalmers University of Technology; []
    Keywords : deformation mechanisms; high-velocity forming; high-velocity parting-off; adiabatic shear band; cold ring rolling; TEM; steel;

    Abstract : Increasing steel prices and environmental aspects have put forward the demand to reduce material consumption and energy usage in manufacturing industry and near-net-shape manufacturing techniques have thus become increasingly important. High-velocity parting-off,high-velocity forming and cold ring rolling are three such manufacturing methods that exhibit great potentials in terms of material waste reduction. READ MORE

  5. 5. Micro-mechanical mechanisms for deformation in polymer-material structures

    Author : Jessica Strömbro; Peter Gudmundson; Per Gradin; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Length-scale effects; Strain gradient; Moisture change; Humidity change; Network model; Fibre model; Mathematical model; Polymer; Micro-indentation; Particle composite; Interfacial debonding; Matrix cracking; Paper; Mechano-sorptive creep; Accelerated creep; Other materials science; Övrig teknisk materialvetenskap;

    Abstract : In this thesis, the focus has been on micro-mechanical mechanisms in polymer-based materials and structures. The first part of the thesis treats length-scale effects on polymer materials. Experiments have showed that the smaller the specimen, the stronger is the material. READ MORE