Search for dissertations about: "Stefan Jonsson"
Showing result 16 - 20 of 44 swedish dissertations containing the words Stefan Jonsson.
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16. Development of a ferritic ductile cast iron for improved life in exhaust applications
Abstract : Due to coming emission legislations, the temperature is expected to increase in heavy-duty diesel engines, specifically in the hot-end of the exhaust system affecting components, such as exhaust- and turbo manifolds. Since the current material in the turbo manifold, a ductile cast iron named SiMo51, is operating close to its limits there is a need for material development in order to maintain a high durability of these components. READ MORE
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17. Oxidation and corrosion fatigue aspects of cast exhaust manifolds
Abstract : Emission regulations for heavy-duty diesel engines are becoming increasingly restrictive to limit the environmental impacts of exhaust gases and particles. Increasing the specific power output of diesel engines would improve fuel efficiency and greatly reduce emissions, but these changes could lead to increased exhaust gas temperature, increasing demands on the exhaust manifold material. READ MORE
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18. Effects of manufacturing chain on mechanical performance : Study on heat treatment of powertrain components
Abstract : The increasing demands for lightweight designs with high strength call for improved manufacturing processes regarding heat treatment of steel. The manufacturing process has considerable potential to improve the mechanical performance and to obtain more reliable results with less variation. READ MORE
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19. Evolution of artificial defects during shape rolling
Abstract : Very often defects are present in rolled products. For wire rods, defects are very deleterious since the wire rods are generally used directly in various applications. For this reason, the market nowadays requires wire rods to be completely defect-free. Any wire with defects must be rejected as scrap which is very costly for the production mill. READ MORE
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20. Regimes of Hospitality : Urban Citizenship between Participation and Securitization – the Case of the Multiethnic French Banlieue
Abstract : This thesis analyzes various local development policies in Europe’s big urban areas. Striving to understand the respective places accorded to the measures to increase the participation of the inhabitants on the one hand, and to improve for security and public peace in the context of social and territorial policies on the other, I examine how urban policies define models of urban citizenship. READ MORE