Partially crystalline metallic glass Fe38Ni36B18Si8 was produced by rapidly solidifying in the form of ribbon. Chemical composition and homogeneity of the sample were determined using Scanning Electron Microscopy, equipped with energy-dispersive X-ray spectroscopy. The diffractogram exhibits a characteristic diffuse halo pattern superimposed with crystalline peaks, indicating existence of crystalline phases. The crystallization kinetics in non-isothermal conditions was studied by Differential Scanning Calorimetry. The electrical resistivity and the dimensions of samples Fe38Ni36B18Si8 were measured at room temperature. The temperature dependence of electrical resistivity was studied from 80 to 273 K. The measurements have shown a positive coefficient of electrical resistivity.
This paper presents the research results of a melt-spun Cu47Zr43Al6Y4 metallic glass. Examinations of its surface, chemical composition and electric resistance had previously been performed and published. Characterization was continued by an x-ray diffraction (XRD) analysis, differential scanning calorimetry (DSC) and microhardness measurements. XRD analysis has unambiguously confirmed that the sample is completely amorphous. DSC measurements were performed with different heating rates which made it possible not only to calculate activation energies, but also to analyse the crystallization process itself. Microhardness measurements have been performed on both sides of the sample.
The paper presents the structural design of a toll station building on the highway. The subject building consists of two different types of structures, a reinforced concrete skeleton structure of ground floor with a flat roof and a steel structure of the canopy. Two reinforced concrete columns that support the canopy rise above the flat ground floor building. This is also the connection between the concrete and steel structure. All structural elements are calculated according to the current Eurocode regulations and National Annexes.
When analyzing structures, there are several different methods that are used. The method most often used in analysis is the finite element method. The finite element method was also used in the elaboration of the problem herein, and it is related to displacement in plate structures. Numerical models will be approximated by finite triangular elements in the CYPE program and by finite square elements in the TOWER 3D Model Builder program. In the end, a comparison will be made of the results and of the influence of the type and density of the finite element mesh as well as the quality of the concrete on the result of the analysis.
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