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Abstract

A comparative analysis of brasses alloys, namely lead-free CuZn (CB771) and lead containing CuZn (CB770), was conducted in this article. The results of the comparative analysis and experimental investigations aimed to provide comprehensive knowledge about the thermophysical properties and solidification characteristics of these alloys. Thermodynamic simulations using Thermo-Calc software and modifications in the chemical composition of the CB771 alloy were employed to approximate its characteristics to those of the lead containing CuZn alloy. Thermal-derivative analysis of the alloys and a technological trial were carried out to determine their solidification characteristics, fluidity, and reproducibility. The casting trials were conducted under identical conditions, and the results were compared for a comprehensive analysis. Additionally, a solidification process simulation was performed using MagmaSoft software to match the thermophysical properties. The aim of this research was to achieve maximum consistency between the simulation results and experimental investigations.
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Bibliography

[1] Zoghipour, N., Tascioglu, E., Celik, F. & Kaynak, Y. (2022) - The influence of edge radius and lead content on machining performance of brass alloys. Procedia CIRP. 112, 274-279. https://doi.org/10.1016/j.procir.2022.09.084 .
[2] Hansen, A. (2019). Bleifreier rotguss als armaturen-undinstallationswerkstoff in der trinkwasserinstallation. METALL Forschung. 73(11), 452-455.
[3] Stavroulakis, P., Toulfatzis, A., Pantazopoulos, G. & Paipetis, A. (2022). Machinable leaded and eco-friendly brass alloys for high performance manufacturing processes: a critical review. Metals. 12(2), 246, 1-31. https://doi.org/10.3390/met12020246.
[4] Schultheiss, F., Johansson, D., Bushlya, V., Zhou, J., Nilsson, K. & Ståhl, J-E. (2017). Comparative study on the machinability of lead-free brass. Journal of Cleaner Production. 149, 366-377. https://doi.org/10.1016/ j.jclepro.2017.02.098.
[5] Johansson, J., Alm, P., M’Saoubi, R., Malmberg, P., Ståhl, J-E. & Bushlya, V. (2022). On the function of lead (Pb) in machining brass alloys. Journal of Advanced Manufacturing Technology. 120, 7263-7275. https://doi.org/10.1007/s00170-022-09205-0.
[6] Acceptance of metallic materials used for products in contact with drinking water, 4MS Common Approach Part B “4MS Common Composition List” Retrieved July, 12, 2022 from http://www.umweltbundesamt.de/en/topics/water/drinking-water/distributing-drinking-water/guidelines-evaluation-criteria.
[7] Directive (EU) 2020/2184 of the European Parliament and of the Council of 16 December 2020 on the quality of water intended for human consumption, Dz.U.L 435/1 of 23.12.2020.
[8] Podrzucki, C. (1991). Cast iron. STOP. (in Polish).
[9] Cholewa, M., Suchoń, J., Kondracki, M. & Jura, Z. (2009). Method of thermal derivative gradient analysis (TDGA). Archives of Foundry Engineering. 9(4), 241-245. ISSN (1897-3310).
[10] Bruna, M. & Sladek, A. (2011). Hydrogen analysis and effect of filtration on final quality of castings from aluminium alloy AlSi7Mg0,3. Archives of Foundry Engineering. 11(1), 5-10.
[11] Ignaszak, Z. (2007). Validation problems of virtual prototyping systems used in foundry for technology optimization of ductile iron castings. Advances in Integrated Design and Manufacturing in Mechanical Engineering II, Springer, 57-79. https://doi.org/10.1007/978-1-4020-6761-7_4.
[12] Fajkiel, A., Dudek, P., Walczak, W. & Zawadzki, P. (2007). Improvement of quality of a gravity die casting made from aluminum bronze be application of numerical simulation. Archives of Foundry Engineering. 7(2), 11-14. ISSN (1897-3310).
[13] Persson, P-E., Ignaszak, Z., Fransson, H., Kropotkin, V., Andersson, R. & Kump, A. (2019). increasing precision and yield in casting production by simulation of the solidification process based on realistic material data evaluated from thermal analysis (Using the ATAS MetStar System). Archives of Foundry Engineering. 19(1), 117-126. DOI: 10.24425/afe.2019.127104.
[14] Ignaszak, Z. & Wojciechowski, J. (2020). Analysis and validation of database in computer aided design of jewellery casting. Archives of Foundry Engineering. 20(1), 9-16. DOI: 10.24425/afe.2020.131275.

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Authors and Affiliations

Grzegorz Radzioch
1 2
Dariusz Bartocha
1
ORCID: ORCID
Marcin Kondracki
1
ORCID: ORCID

  1. Department of Foundry Engineering, Silesian University of Technology, 7 Towarowa Str. 44-100 Gliwice, Poland
  2. Joint Doctoral School, Silesian University of Technology, 2A Akademicka Str. 44-100 Gliwice, Poland
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Abstract

The goal of the work was to investigate the influence of silver addition on the microstructure of CuNi2Si1 alloys. The investigated copper alloy was cast and then supersaturated, plastically deformed on the Gleeble 3800 simulator and finally aged. Structural changes were examined using optical microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Orientation mapping was completed FEI Quanta 3D field emission gun scanning electron microscope (SEM) equipped with TSL electron backscattered diffraction (EBSD) system. The effect of structural and microstructural changes on hardness and conductivity was also investigated. Based on the mechanical tests it was found, that the mechanical properties and conductivity are improved due to heat and plastic treatment. It was also found that the precipitation hardening raises the hardness to the level of 40% whilst an increase in conductivity by 20% is observed.
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Authors and Affiliations

Beata Krupińska
1
ORCID: ORCID
Robert Chulist
2
Marcin Kondracki
3
ORCID: ORCID
Krzysztof Labisz
4

  1. Silesian University of Technology, Faculty of Mechanical Engineering, Department of Engineering Materials and Biomaterials, 44-100 Gliwice, Konarskiego St. 18a, Poland
  2. Institute of Metallurgy and Materials Science of Polish Academy of Sciences, 30-059 Krakow, Reymonta St. 25, Poland
  3. Silesian University of Technology, Faculty of Mechanical Engineering, Department of Foundry Engineering, 44-100 Gliwice, Konarskiego St. 18a, Poland
  4. Silesian University of Technology, Faculty of Transport and Aviation Engineering, Department of Railway Transport, 44-100 Gliwice, Konarskiego St. 18a, Poland

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