Sökning: "Jesper Hattel"

Hittade 5 avhandlingar innehållade orden Jesper Hattel.

  1. 1. Modeling and Simulation of Weld Hot Cracking

    Författare :Joar Draxler; Lars-Erik Lindgren; Jonas Edberg; Paul Åkerström; Jesper Hattel; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

    Sammanfattning : Several alloy systems are susceptible to weld hot cracking. Weld hot cracking occurs by fracture of liquid films, normally grain boundary liquid films, at the late stage of the solidification of the weld. The cracks can be small and therefore difficult to detect by nondestructive test methods. LÄS MER

  3. 2. Modelling of induction heat treatment in a manufacturing chain

    Författare :Martin Fisk; Jesper Hattel; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

    Sammanfattning : Due to increased competitiveness in the aerospace industry, deeper knowledge of the manufacturing process is needed. It is, for example, known that the microstructure is important for the performance of the components. LÄS MER

  4. 3. Modelling and simulation of welding and metal deposition

    Författare :Andreas Lundbäck; Jesper Hattel; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design; Material Mechanics; Materialmekanik;

    Sammanfattning : Fusion welding is one of the most used methods for joining metals. This method has largely been developed by experiments, i.e. trial and error. LÄS MER

  5. 4. Pores, inclusions and electromagnetic stirring : Topics from the continuous casting of steel

    Författare :Arash Safavi Nick; Pär Jönsson; Michael Vynnycky; Jesper H. Hattel; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : This thesis deals with two topics of relevance to the continuous casting of steel,in view of their importance as regards the quality of the final solidified structure.The first concerns the precipitation of gas pores and inclusions in the interden-dritic region of the solidifying metal. LÄS MER

  7. 5. Modelling of high strain rate plasticity and metal cutting

    Författare :Dan Wedberg; Jesper Hattel; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

    Sammanfattning : Metal cutting is one of the most frequently used forming processes in the manufacturing industry. Extensive effort is made to improve its process and simulation has become an integrated part, not only in the product development process but also in the customer relations. LÄS MER