Search for dissertations about: "massive transformations"

Showing result 1 - 5 of 8 swedish dissertations containing the words massive transformations.

  2. 1. On Peritectic Reactions and Transformations and Hot Forming of Cast Structures

    Author : Hani Nassar; Hasse Fredriksson; Rian Dippenaar; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; peritectic reactions; massive transformations; thermal analysis; Fe-base alloys; steels; growth irregularities; hot forming; compression testing; flow stress; grain size.; Metallurgical manufacturing engineering; Metallurgisk produktionsteknik; Metallurgical process engineering; Metallurgisk processteknik;

    Abstract : This thesis deals with peritectic reactions and transformations that occur during the solidification of many alloys. Peritectics are believed to be a major cause of crack-formation in many steels, thus, good knowledge of the mechanisms by which these phenomena occur is essential for preventing such defects. READ MORE

  4. 2. Computational tools for simulation of phase transformations

    Author : Mikael Schalin; KTH; []
    Keywords : ;

    Abstract : A new software package, Thermite, for thermodynamiccalculations and process simulation is developed around theThermo-Calc databank. Thermite is a computational toolbox forequilibrium calculations and simulation of phasetransformations. It provides graphic visualisation and allowsmanipulation of the presented data. READ MORE

  5. 3. Phase-field modeling of diffusion controlled phase transformations

    Author : Irina Loginova; KTH; []
    Keywords : phase-field; dendritic growth; grain boundary; Widmanstaetten plate; solidification;

    Abstract : Diffusion controlled phase transformations are studied bymeans of the phase-field method. Morphological evolution ofdendrites, grains and Widmanst\"atten plates is modeled andsimulated.Growth of dendrites into highly supersaturated liquids ismodeled for binary alloy solidification. READ MORE

  6. 4. Degenerate Geometries, Supersymmetry and Duality

    Author : Henrik Gustafsson; Marcus Grisary; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Abstract : String theory is a theory attempting to unify gravity with the electro-weak and strong interactions so successfully described by Quantum Field Theory. The implications of String Theory is not fully understood since it is still not a complete theory. READ MORE

  7. 5. Model and Dependency Management in Mechatronic Design

    Author : Ahsan Qamar; Wikander Jan; Carl During; Kristina Shea; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dependency Modeling; Model-Based Systems Engineering MBSE ; Mechatronic Design; Model Integration; Tool Integration; Common Language; Mechatronic Challenges; Domain Specific Language.;

    Abstract : Managing consistency is a major concern in the design of complex engineering systems. At times, inconsistencies may lead to wrong decisions, resulting in design flaws which can compromise safety and cause failures. One cannot forget the 1999 NASA unmanned MARS Climate Orbiter, which was destroyed due to use of inconsistent units by design teams. READ MORE