The Evaluation of Mechanical Properties of High-tin Bronzes

• Autorzy: Nadolski M.

Identyfikatory

DOI

10.1515/afe-2017-0023

• Języki publikacji: EN

Abstrakty

EN

High-tin bronzes are used for church bells and concert bells (carillons). Therefore beside their decorative value, they should also offer other functional properties, including their permanence and good quality of sound. The latter is highly influenced by the structure of bell material, i.e. mostly by the presence of internal porosity which interferes with vibration of the bell waist and rim, and therefore should be eliminated. The presented investigations concerning the influence of tin content ranging from 20 to 24 wt% on mechanical properties of high-tin bronzes allowed to prove the increase in hardness of these alloys with simultaneous decrease in the tensile and the impact strengths (Rm and KV, respectively) for the increased tin content. Fractures of examined specimens, their porosity and microstructures were also assessed in order to explain the observed regularities. A reason of the change in the values of mechanical properties was revealed to be the change in the shape of α-phase crystals from dendritic to acicular one, and generation of grain structure related to the increased Sn content in the alloy.

Słowa kluczowe

EN

mechanical properties; tin bronzes; bell material; microstructure

PL

właściwości mechaniczne; brąz cynowy; dzwon; mikrostruktura

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 1
• Strony: 127--130
• Opis fizyczny: Bibliogr. 7 poz., il., rys., tab.

Twórcy

autor

Nadolski M.

• Department of Foundry, Czestochowa University of technology Al. Armii Krajowej 19, 42-200 Częstochowa

Bibliografia

• [1] Adamski, Cz., Bonderek, Z., Piwowarczyk, T. (1972). Microstructures of copper casting alloys and zinc casting alloys. Katowice: Ed. Silesia. (in Polish).
• [2] Audy, J. & Audy, K. (2008). Analysis of bell materials: Tin bronzes. China Foundry. 5(3), 199-204.
• [3] Audy, J. & Audy, K. (2009). Effects of microstructure and chemical composition on strength and impact toughness of tin bronzes. MM Science Journal. 6, 124-129.
• [4] Strafford, K.N., Newell, R., Audy, K. & Audy, J. (1996). Analysis of Bell Material from the Middle Ages to the Recent Times. Endeavour. 20(1), 22-27.
• [5] Strafford, K.N., Newell, R., Audy, K., Audy, J. (1996). The Metallurgy of Bells. In Conference Proceeding, Materials Research. 10th of July 1996 (vol. 1, pp. 109-112). Australia: The Institute of Metals and Materials, Australasia, Ltd.
• [6] Meréchal, K. (1974). Bell casting technology. Foundry Review (Przegląd Odlewnictwa). (8-9), 269-273 (in Polish).
• [7] Perrin, R., Charnley, T. & Swallowe, G.M. (1995). On the Tuning of Church and Carillon Bells. Applied Acoustics. 46(1), 83-101.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).