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Assessment of the Change in the Tin Concentration in Bronzes to the Basic Components of the Sound of Bells

Cekus Dawid, Nadolski Maciej

Archives of Metallurgy and Materials

2021

Vol. 66, iss. 2

531--535

The subject of the study was to determine the impact of changes in mechanical properties of high-tin bronzes on the basic components of the sound of a bell. Change in the tin concentration in the range of about 7.5 to 20 parts wt. in a casting alloy significantly affects the mechanical properties of the alloy such as Young’s modulus or hardness. The free vibrations of bells were obtained with the help of the finite element method. In the numerical analyses the mechanical properties of standard alloys were adopted. The obtained natural frequencies of the bell made of a bronze with different tin concentration in copper were compared with the acoustic properties of a real bell casted on the basis of the same ribs. A significant effect of the increase in the alloying share of tin on the obtained results was stated. In addition, the acoustic analysis of aluminum bronze C95500 have been performed. Based on the obtained results, authors stated that this material can replace the commonly used high tin bronze C91300 for the unit production of bells.

The Influence of Solidification Rate on High-tin Bronze Microstructure

Bartocha D., Baron C., Suchoń J.

Archives of Foundry Engineering

2019

iss. 1

89--97

The most important feature of bells is their sound. Their clarity and beauty depend, first of all, on the bell’s geometry - particularly the shape of its profile and the mechanical properties of alloy. Bells are the castings that work by emitting sound in as-cast state. Therefore all features that are created during melting, pouring, solidification and cooling processes will influence the bell's sound. The mechanical properties of bronze depend on the quality of alloy and microstructure which is created during solidification and depend on its kinetics. Hence, if the solidification parameters influence the alloy’s properties, how could they influence the frequencies of bell`s tone? Taking into account alterable thickness of bell's wall and differences in microstructure, the alloy's properties in bell could be important. In the article authors present the investigations conducted to determine the influence of cooling kinetics on microstructure of bronze with 20 weight % tin contents.

Effect of Modifying and Alloying Elements on the Structure and Properties of Surfaced Layers Made of High-Tin Bronze

Majdanczuk T. B., Iljuszenko W. M., Bondarenko A. N.

Biuletyn Instytutu Spawalnictwa w Gliwicach

2017

Vol. 61, No. 1

39--43

The article discusses the effect of some modifying and alloying elements on the structural, mechanical and operational properties of high-tin bronze used for the submerged arc surfacing of steels. The research-related tests enabled the determination of optimum contents of the above-named elements ensuring the improvement of mechanical and operational properties through changes in the shape and structural constituent dimensions of the metal subjected to surfacing. In addition, the research revealed the favourable effect of a nickel addition (up to 2%) on the reduction of high-tin bronze penetration, on grain boundaries, in the steel base.

Rozpatrzono wpływ niektórych pierwiastków modyfikujących i stopowych na właściwości strukturalne, mechaniczne i eksploatacyjne brązu wysokocynowego napawanego łukiem krytym na stal. Określono optymalną zawartość tych pierwiastków, przy której zapewnione jest polepszenie właściwości mechanicznych i eksploatacyjnych w wyniku zmiany kształtu i wymiarów składowych strukturalnych napawanego metalu. Stwierdzono także dodatni wpływ dodatku niklu (do 2%) na zmniejszenie wnikania brązu wysokocynowego po granicach ziarn w podłoże stalowe.