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Showing result 1 - 5 of 108 swedish dissertations matching the above criteria.

  2. 1. Microstructure and mechanical properties of a 5 wt.% Cr cold work tool steel : Influence of heat treatment procedure

    Author : Arbab Rehan; Lars-Erik Svensson; Leif Karlsson; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cold work tool steel; Heat treatment; Microstructural characterisation; Mechanical properties; Retained austenite; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : The demand for Advanced High Strength Steel (AHSS) in the automotive industry is increasing day by day. It is mainly motivated by the fact that AHSS can be used as thin sheets while having high strengths. READ MORE

  4. 2. Simulation of welding and heat treatment : modelling and validation

    Author : Henrik Alberg; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

    Abstract : Many aerospace components with complex geometry are fabricated from smaller parts using joining techniques such as welding. Welding and the heat treatment which usually follows, can result in unwanted deformation and stresses. READ MORE

  5. 3. Laser-Directed Energy Deposition : Influence of Process Parameters and Heat-Treatments

    Author : Suhas Sreekanth; Joel Andersson; Shrikant V. Joshi; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Directed Energy Deposition; Alloy 718; Process Parameters; Heat Treatments; Nb- rich Phases; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : Laser-Directed Energy Deposition (L-DED), an Additive Manufacturing (AM) processused for the fabrication of parts in a layer-wise approach has displayed an immense potential over the last decade. The aerospace industry stands as the primary beneficiary due to the L-DED process capability to build near-net-shape components with minimal tooling and thereby producing minimum wastage because of reduced machining. READ MORE

  6. 4. Material modelling for simulation of heat treatment

    Author : Henrik Alberg; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

    Abstract : Heat treatment of materials is a fundamental metallurgical process. Materials are subjected to heat treatment to relieve internal stresses, reduce brittleness and to improve machinability. The properties of materials can also be altered such as hardness, strength, toughness, and wear resistance to suit particular applications. READ MORE

  7. 5. Thermal and mechanical behaviour of railway wheel steel

    Author : Johan Ahlström; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; phase transformations; plastic deformation; sliding contact; heat conduction modelling; low cycle fatigue; railway wheel steel Fe-0.5C-0.3Si-0.75Mn-0.05V ; austenitisation; transformation kinetics; heat treatment; friction;

    Abstract : The wish to increase loads and speeds of trains puts higher demand on construc¬tion, engineering and material than ever before. Therefore it is necessary to con¬tinuously develop technology to meet these increasing requirements. READ MORE