Journal of Casting & Materials Engineering
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ISSN 2543-9901
Issue Date
2025
Volume
Vol. 9
Number
No. 3
Description
Journal Volume
Journal of Casting & Materials Engineering
Vol. 9 (2025)
Projects
Pages
Articles
Influence of selected corrosive environment on the scale formation in selected materials manufactured by directed energy deposition 3D printing technology
(AGH University Press, 2025) Małysza, Marcin; Rząd, Ewa; Zięba, Łukasz
Additive technologies, and in particular Directed Energy Deposition (DED), are becoming an increasingly important tool for the rapid production of components operating in, among others, the energy, aviation, petrochemical industries, where components are exposed to extreme thermochemical conditions. In the article, the influence of various corrosive atmospheres atmospheric air, water vapor and SO?-argon- mixture – on the process of scale formation on the surface of materials manufactured using Directed Energy Deposition (DED) technology is presented. The tests were carried out at a temperature of 600°C (for air and water vapor) and 300°C (for SO?-argon atmosphere). The mass increase and surface damage was monitored. It has been shown that the chemical composition of materials, especially the content of alloying elements such as Cr and Ni, is crucial for corrosion resistance. The obtained results provide the basis for further optimization of the composition of powders used in additive man ufacturing techniques, in terms of operating conditions in aggressive environments.
Influence of cooling rate on the structure and damping properties of the AlSi6Cu4 alloy
(AGH University Press, 2025) Piwowarski, Grzegorz; Ogrodnik, Mateusz
The investigated alloy was cast as a shaft into seven casting molds. Casting molds made of different materials were char acterized by different abilities to conduct heat from the sample. This property significantly influenced the cooling rate of the sample casting from the AlSi6Cu4 alloy. The highest cooling rate was achieved in a steel mold at 25°C and the lowest in a mold made of insulating mass. Different cooling rates significantly influenced the structure of the alloy. Different grain sizes were obtained and the morphology of the microstructure components changed. At the highest cooling rate of 16.63 K·s?1, a grain with an average size of 0.58 mm was obtained. However, in the mold with the lowest cooling rate of 0.36 K·s?1, the average grain size was 3.76 mm. Changes in the structure of the alloy also influenced its damping prop erties. The tested values f the vibration damping coefficient ? indicated that the AlSi6Cu4 alloy cooling with the highest cooling rate has the highest value of damping coefficient. This is influenced by the grain size and shape of the silicon pre cipitates. The refinement structure and fragmented components effectively disperse the vibration wave in the structure of the casting alloy.
Design of a solidification rate measurement experiment for cast steel in molds made of different sands using computer simulation
(AGH University Press, 2025) Mordyl, Natalia; Jakubski, Jarosław; Żak, Paweł Leszek
This article presents the design process of the casting technology for a step-shaped casting made of steel using simulation tools. A series of proposals for gating and feeding systems were simulated in the MAGMASoft® software. Results of numerical simulations allowed the Authors to select the casting technology which allows defect-free casting to be obtained. A numer ical analysis of the cooling rate of a step-shaped casting made of GX70CrMnSiNiMo2 tool steel with a 5% Ti addition was carried out for the selected manufacturing technology. Due to the nature of the material used and the extended presence of martensite during cooling, in-mold hardening of the casting may occur. The simulations showed that the type of molding material affects the cooling rate, which is confirmed by the analysis of cooling curves and the morphology of shrinkage po rosity. The analysis of solidification rates provides a valuable starting point and basis for subsequent research stages, taking into account the actual properties of the molding sands and the phase transformations occurring in the selected steel type. The casting technology design, which ensures the production of sound casting, was developed as part of this study. A series of simulations using different molding materials confirms the significant impact that the choice of mold material has on the casting solidification and cooling process.
Harmonic analysis in the power supply system of a selected single-phase industrial robot
(AGH University Press, 2025) Ziółkowski, Eugeniusz
The selection of industrial robots in technological lines is primarily based on their technical characteristics, such as the type of construction, the number of axes, reach, maximum load, and power supply parameters (power consumption in single-phase or three-phase systems). In the overall energy balance, the transient states and the harmonics of voltages and currents in the power supply system of the selected industrial robot are also operationally significant. The article presents the results of the harmonic analysis of voltage and current in the power supply system of a chosen industrial single-phase robot.