Browsing by Author "Pysz, Stanisław"

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Access status: Open Access ,
An introduction to the problem of the conversion of structural components, including components manufactured by casting techniques
(2016) Czekaj, Edward; Pysz, Stanisław; Garbacz-Klempka, Aldona; Żuczek, Robert
Modern development of technology features not only dynamic changes aimed at improving the performance characteristics of structural components through the optimum selection of materials, adjustments in design, or upgrade of manufacturing processes, but also the increase of the economic impact resulting from these changes. All of these processes occur under one common name of conversion and have a simple or – more often complex character (due to the vast scope of changes introduced). This article examines some basic definitions related to the concept of conversion and its association with innovative and intelligent solutions currently applied in materials engineering. Due to a variety of problems, attention was focused on the core notions related to conversion. Basing on our own experience (i.e., on the experience of the Foundry Research Institute and AGH University of Science and Technology in Krakow) and also on foreign achievements in this particular field of knowledge (mainly coming from the US), the most interesting examples of the conversion of materials and design (in the authors’ opinion) were discussed with reference to the methods of manufacture and possible interactions.
Access status: Open Access ,
The application of a computer technique to assess the impact of chemical composition on dispersed shrinkage microporosity of hypoeutectic cast silumins
(2014) Czekaj, Edward; Pysz, Stanisław
This article presents the possibility of decreasing dispersed shrinkage microporosity in castings of hypoeutectic alloying silumins, as a result of narrowing - within the standards or industrial specifications - the content of particular elements of the chemical composition: alloying additions and/or impurities. This relatively-simple and, at the same time, inexpensive method can often lead to a quick solution of this type of defects in castings and the improvement of their tightness. In order to orientate the chemical composition towards an optimal content, computer-aided statistical processing was conducted (using Statistica Ver. 9 software) with the application of figures directly related to shrinkage microporosity as well as indirectly related to the temperature range of crystallisation (ΔT = Tlik - Tsol). This data came from literature and MAGMASoft software for simulations of pouring and solidification processes in castings. The achieved results were verified under industrial conditions.