Žilinská univerzita v Žiline

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    Vyvolanie scitlivenia na koróziivzdornej oceli 1.4845
    (University of Žilina, 2023) Kaličiak, Samuel; Kantoríková, Elena; Bolibruchová, Dana
    The experiment is focused on the influence of heat treatment, solution annealing and subsequent sensitization of stainless steel 1.4845. In the experiment, a suitable thermal cycle of solution annealing and subsequent sensitization is designed. Subsequent comparisons of the microstructure and hardness of steel 1.4845 before and after the proposed heat treatment
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    Hodnotenie vplyvu technologických parametrov na mikroštrutúru vysokotlakových odliatkov
    (Žilinská univerzita v Žiline, 2023) Medňanský, Martin; Brůna, Marek; Matejka, Marek
    A number of technological parameters influence the mechanical properties of a high pressure die casting. The aim of the presented paper was to perform microstructural analysis of AlSi9Cu3(Fe) alloy casting fabricated with high-pressure die casting (HPDC) technology. Several castings with varying casting parameter – maximum plunger speed vmax were cast. In pre-selected critical spots, the effect of vmax was observed on the shape and size of the structural components, where at lower vmax the eutectic Si shortened in length and thickened. EDS analysis determined found intermetallic phases to be α-Al(Fe,Mn,Cr)Si in the shape of a rhombic dodecahedron with sizes as small as 2 µm and Al2Cu being present in both modifications – oblong grains and globular ternary eutectic. There was no significant change in microhardness of α(Al) phase found, that would be caused by the varying vmax
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    APPLICATION CONCEPT FOR THE NEW COMPOSITE MATERIAL FOR THE ROTORCRAFT
    (Žilinská univerzita v Žiline, 2020) Korzec, Izabela; Łusiak, Tomasz; Bugaj, Martin
    This presentation shows certain number of material samples composite with different polymer reinforcement and weave, made by the manual lamination method under certain conditions. The samples have been made under laboratory conditions. In turn, the purpose of experimental testing was to determine mechanical properties such as: microstructure of laminates, hardness tensile and compressive strength. At the beginning of this work the terminology of the word composite and its division is described. In the next part of the work is information on the reinforcements used to obtain composite materials, their manufacturing methods, and their main application in industry. Chapters (own research) describes the results of the conducted research microstructure of composite laminates, hardness measurement results were analyzed. The analysis of the obtained strength results was carried out using the Shore'a method and the analysis of the obtained strength results for stretching and squeezing. The obtained results are presented in the diploma thesis in graphic form, then described and compared.