Browsing by Author "Krajewski, Witold K."
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Item type:Thesis, Access status: Restricted , Experimental and numerical investigation of heat treatment of $Al-Si-Cu$ alloy(Data obrony: 2014-07-04) Cupido, Llewellyn Heinrich
Wydział OdlewnictwaItem type:Doctoral Dissertation, Access status: Open Access , Model krystalizacji w układzie dwuskładnikowym z udziałem trzech faz z wykorzystaniem automatu komórkowego(Data obrony: 2011) Gurgul, Daniel
Wydział OdlewnictwaIn the first part of thesis an overview of modeling of cast iron solidification is presented. It is a short historical re-view, starting with analytical models and ending with fully numerical. The characteristics of individual models are briefly described. Chapter "Model description" presents a detailed description of the model of ductile iron solidification. It is based on cellular automaton technique. Its characteristic feature is that the shape of growing austenite and graphite grains is not supposed a priori, but is the result of model calculations. The model takes into account such phenomena as heat transfer, diffusion of carbon in liquid and austenite, release of latent heat and its impact on the conditions prevailing at the front of solidification, nucleation of austenite and graphite. The model takes into consideration nonequilibrium nature of phase transformations and the effect of curvature of the interphase boundaries on the temperature of thermodynamic equilibrium. In the experimental part simulations of ductile iron solidification were performed for hypoeutectic, eutectic and hypereutectic composition. The modeling results were compared with experimental results which were obtained for ductile iron with hypoeutectic composition and for so called transparent model substance. The modeling cooling curve was compared with the real cooling curve. In order to qualitatively comparison of calculated microstructures they were compare with real microstructures of the experimental castings.Item type:Thesis, Access status: Restricted , Numerical optimization of the gating system of an inlet valve casting made of titanium alloy(Data obrony: 2014-07-04) Fourie, Jecois
Wydział OdlewnictwaItem type:Thesis, Access status: Restricted , Wykorzystanie programu FLOW-3D do analizy ruchu ciekłego metalu w układach wlewowych stosowanych przy wytwarzaniu wielkogabarytowych odlewów żeliwnych i staliwnych(Data obrony: 2011-10-11) Halek, Sylwia Teresa
Wydział OdlewnictwaItem type:Thesis, Access status: Restricted , Wykorzystanie systemu Comsol Multiphysics 3.5a do numerycznej analizy przepływów w charakterystycznych fragmentach układów wlewowych stosowanych przy wytwarzaniu wielkogabarytowych odlewów żeliwnych i staliwnych(Data obrony: 2011-10-11) Goraj, Tomasz Piotr
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