Journal of Casting & Materials Engineering
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ISSN 2543-9901
Issue Date
2017
Volume
Vol. 1
Number
No. 2
Description
Journal Volume
Journal of Casting & Materials Engineering
Vol. 1 (2017)
Projects
Pages
Articles
Bending and compression properties of ABS and PET structural materials printed using FDM technology
(AGH University of Science and Technology Press, 2017) Szczepanik, Stefan; Bednarczyk, Piotr
The bend and compression mechanical properties of 3D-printed polyethylene terephthalate (PET) and acrylonitrile butadiene styrene (ABS) rectangular and cylindrical specimens (fully-dense and with circular, hexagonal, and rectangular perforations) are presented. In three-point bending, fully-dense PET flexural strength was 69 MPa, yield stress was 48.9 MPa, and yield stress from compression was 31.4 MPa. For ABS, these values were 59, 41.7, and 51.2 MPa, respectively - not significantly different from those of polymers manufactured by common techniques. Whereas perforation reduced density, the strength values were significantly lower, decreased for the circular perforation to a value of 20% strength for the fully-dense specimen. Specific strengths dropped quite significantly for the specimens tested in bending, whereas they did not differ significantly when tested by compression.
Calculation of assimilation process of non-metallic inclusions by slag
(AGH University of Science and Technology Press, 2017) Kalisz, Dorota
This paper presents the results of calculating the phenomenon of the absorption of non-metallic precipitates in steel by slag. Calculations are made for the forces acting on the non-metallic particles in steel during the flow-out into the slag, depending on the particle radius and physicochemical properties of the liquid steel and slag. An analysis of the calculation results of capillary force acting on a particle in the vicinity of the steel-slag interface at changing surface energy values between the precipitates and slag shows that capillary force depends on the interfacial tension between the precipitates and slag only to a small degree.
The effect of rapid cooling on the corrosion resistance of as-cast aluminium alloy 5052
(AGH University of Science and Technology Press, 2017) Szklarz, Zbigniew; Krawiec, Halina; Rogal, Łukasz
The effect of rapid cooling by the vacuum suction casting method (VSC) on the microstructure and electrochemical response of the as-cast 5052 aluminium alloy is presented. The VSC method allowed us to obtain massive samples with a very high cooling rate (10$^{2}$ - 10$^{3}$)°C/s. The microstructure of the quick-cooled sample (QC) has been significantly changed. Finer grains and more-homogeneous intermetallic phase distribution has been observed. Corrosion potential (OCP) and polarization measurements (LSV) revealed a higher activity of the QC alloy than ingot (IN), which leads to a denser and thicker corrosion-product formation on the surface. Electrochemical Impedance Spectroscopy (EIS) indicates higher resistance values, which suggests a greater thickness of the corrosion products.
Power consumption comparison of model vibratory unit in power supply system with and without inverter for frequency setting of 50 Hz
(AGH University of Science and Technology Press, 2017) Ziółkowski, Eugeniusz; Skrzyński, Mateusz
The article presents the instantaneous voltage and current values recorded in the power-supply system of a vibratory unit directly from the power grid or through an inverter for a frequency setting of 50 Hz. The obtained measurement data was used to perform digital signal processing algorithms, calculations of effective voltages, currents, power (active, reactive, and apparent), and power factor tgφ. The results of the calculations were used to compare the two power systems examined.