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    Wyświetlanie 1-5 z 5
    Tytuł:
    Microstructure and properties of tin bronzes produced by the SPD method
    Autorzy:
    Sobota, J.
    Rodak, K.
    Nowak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/355126.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    tin bronzes
    KOBO
    microstructure
    mechanical properties
    corrosion
    Opis:
    In this article the structural and mechanical properties of grain refinement of Cu-Sn alloys with tin content of 10%, 15% and 20% using the KOBO method have been presented. The direct extrusion by KOBO (name from the combination of the first two letters of the names of its inventors – A. Korbel and W. Bochniak) method employs, during the course of the whole process, a phenomenon of permanent change of strain travel, realized by a periodical, two-sided, plastic metal torsion. Moreover the aim of this work was to study corrosion resistance. The microstructure investigations were performed using an optical microscope Olimpus GX71, a scanning electron microscope (SEM) and a scanning transmission electron microscope (STEM). The mechanical properties were determined with INSTRON 4505/5500 machine. Corrosion tests were performed using «Autolab» set – potentiostat/galvanostat from EcoChemie B.V. with GPES software ver. 4.9. The obtained results showed possibility of KOBO deformation of Cu-Sn casting alloys. KOBO processing contributed to the refinement of grains and improved mechanical properties of the alloys. The addition of tin significantly improved the hardness. Meanwhile, with the increase of tin content the tensile strength and yield strength of alloys decrease gradually. Ductility is controlled by eutectoid composition and especially δ phase, because they initiate nucleation of void at the particle/matrix interface. No significant differences in the corrosion resistance between cast and KOBO processed materials were found.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 95-102
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Evaluation of Mechanical Properties of High-tin Bronzes
    Autorzy:
    Nadolski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381333.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    właściwości mechaniczne
    brąz cynowy
    dzwon
    mikrostruktura
    mechanical properties
    tin bronzes
    bell material
    microstructure
    Opis:
    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.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 1; 127-130
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research of Aluminium Influence on Tin Bronzes
    Autorzy:
    Rzadkosz, S.
    Garbacz-Klempka, A.
    Kozana, J.
    Piękoś, M.
    Czekaj, E.
    Perek-Nowak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382669.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    durable alloys
    tin bronzes
    mechanical properties
    metallography
    microstructure
    trwałość stopów
    brązy cynowe
    właściwości mechaniczne
    metalografia
    mikrostruktury
    Opis:
    During the research a group of copper and tin alloys was investigated. The influence of variable additions of aluminium within the range of 0.3 – 1.4 wt % was analysed on tin bronze CuSn10 with the aim of obtaining durable bronzes, from outside the normalized copper alloy groups. Melts were conducted in order to obtain alloy samples for testing the chosen properties. Metallographic and SEM-EDS tests were carried out to determine the microstructure changes caused by introducing Al addition to CuSn10 alloy. Also, chosen mechanical properties were tested for the alloys investigated. The results showed considerable changes in the microstructure as well as significant hardening of the Cu-Sn alloys as the result of aluminium addition. The thermal and dilatometric analysis confirmed the presence of phase changes, also their parameters were assessed depending on the share of aluminium addition in the CuSn10. The aluminium additive applied within the range of 0.3-1.4 wt% to CuSn10 bronze clearly impacted the microstructure and the strength properties analysed, causing the increase in strength and hardness with simultaneous insignificant decrease of elongation of the CuSn10Al alloys.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 93-98
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of High-tin Bronze Composition on Physical, Mechanical, and Acoustic Properties of Gamelan Materials
    Autorzy:
    Slamet, S.
    Suyitno, S.
    Kusumaningtyas, I.
    Miasa, I. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837824.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    tin bronzes
    mechanical properties
    acoustic properties
    gamelan
    sand casting
    brązy cynowe
    właściwości mechaniczne
    właściwości akustyczne
    odlewanie piaskowe
    Opis:
    High tin bronze alloy (Cu>17wt.%Sn) is commonly as raw material to fabricate musical instruments. Gamelan musical instruments in Indonesia are produced using tin bronze alloy raw materials. The tin bronze alloy used by each gamelan craftsman has a different tin composition, generally in the range of Cu(20-24) wt.% Sn. This study aims to investigate the effect of microstructure, density, and mechanical properties of Cu(20-24)wt.%Sn against the acoustic properties processed by the sand casting method. The material is melted in a crucible furnace until it reaches a pouring temperature of 1100ºC by the sand casting method. The specimens were subjected to microstructure observations, density and porosity as well as mechanical properties testing including tensile strength, bending strength, hardness, and modulus of elasticity. Mechanical properties data then used to calculate several parameters of acoustic properties including speed of sound (c), impedance (z) and radiation coefficient (R). Processes simulation using Finite Element Analysis (FEA) and Experiment Method Analysis (EMA) were carried out to determine acoustic properties including sound intensity, natural frequency and damping capacity. The experimental result shows that the increase in tin composition in Cu(20-24) wt.% Sn changed the microstructure of coarse grains into dendrite-columned fine grains. Physical properties of density decrease, while porosity increases. Mechanical properties including tensile strength, modulus of elasticity, and bending strength decreased, while the hardness of the alloy increases. The calculation of acoustic parameters such as the speed of sound (c), impedance (z) and radiation coefficient (R) has decreased. Moreover, sound intensity (dB), natural frequency (Hz) and damping capacity also decrease with increasing tin composition. Hence, tin bronze alloy Cu20wt.%Sn is the recommended raw material for the manufacture of gamelan instruments through the sand casting method.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 137-145
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kształtowanie mikrostruktury i właściwości mechanicznych brązów cynowych
    Shaping the Microstructure and Mechanical Properties of Tin Bronzes
    Autorzy:
    Rzadkosz, S.
    Kozana, J.
    Garbacz-Klempka, A.
    Piękoś, M.
    Cieślak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/381842.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    materiały innowacyjne
    innowacyjne technologie odlewnicze
    brązy cynowe
    miedź
    mikrostruktura
    właściwości mechaniczne
    innovative materials
    innovative technologies foundry
    tin bronzes
    copper
    microstructure
    mechanical properties
    Opis:
    W artykule zaprezentowano wyniki badań nad wybraną grupą stopów z układu Cu-Sn. Przeanalizowano oddziaływanie udziału cyny w brązach cynowych w zakresie od 6 do 30 %. Kontynuując badania zmierzające do uzyskania odpornych na zużycie brązów spoza grup znormalizowanych stopów miedzi, oceniono oddziaływanie dodatku aluminium w stopach Cu-Sn. Przeprowadzono badania metalograficzne zmierzające do określenia mechanizmów oddziaływania zmiennych zawartości dodatków stopowych z uwagi na zmiany podstawowych właściwości mechanicznych. Uzyskane wyniki wskazują na wyraźne zmiany mikrostruktur badanych stopów, jak również wykazują silne utwardzenie stopów Cu-Sn. Zastosowane dodatki aluminium w zakresie do 3 % w wybranych stopach powodują również poprawę właściwości mechanicznych badanych brązów cynowych z dodatkiem aluminium.
    During the research a chosen group of copper - tin alloys were investigated. The influence Sn in tin bronzes was analysed in the broad spectrum between 6 to 30%. Continuing the research aiming at obtaining durable bronzes outside the normalised copper alloys, the influence of chosen aluminium additive in selected Cu-Sn alloys was assessed. Metallographic tests were carried out to determine the operating mechanisms and also the influence of the varied alloying additives from the perspective of changes in the basic properties of the alloys investigated. The obtained results clearly point to the changes in microstructures and mechanical properties of the alloys investigated.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4 spec.; 107-110
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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