Valoración de las propiedades mecánicas de la aleación Cu-8Sn refinada con zirconio

Marco Aurelio Paniagua Villa; Juan Marcelo Rojas Arango

doi:10.17533/udea.rcm.342064

Authors

Marco Aurelio Paniagua Villa University of Antioquia
Juan Marcelo Rojas Arango University of Antioquia

DOI:

https://doi.org/10.17533/udea.rcm.342064

Keywords:

as cast, inoculation, bronzes, zirconium, mechanical tests

Abstract

The grain refinement carried out through in-situ inoculation of bronze as-cast has been studied for several years with the purpose of establishing an effective methodology that allows obtaining alloys with a refined grain structure and without the need for applying heat treatments to the obtained alloys. In the present investigation the refining effect of zirconium on the grain size and the mechanical properties (hardness and tensile) of the alloy (Cu8%wtSn) "as cast" was studied; for this, two Cu8Sn and Cu8Sn0,32Zr alloys were manufactured. These alloys were produced by casting in sand mold agglomerated with phenolic resin; once the alloys were produced, test specimens were manufactured according to ASTM B208-14. The obtained pieces were cut and machined to produce tension specimens, with the purpose of performing tensile and hardness tests, in addition to performing fractographic analyzes. The results showed that the ultimate tensile strength, yield point, Brinell hardness and breaking stress of the Cu8Sn0,32Zr alloy were greater than that of Cu8Sn. Similarly, a reduction in the average grain size in the Cu8Sn0,32Zr alloy of 85% was obtained.

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Author Biographies

Marco Aurelio Paniagua Villa, University of Antioquia

Master's Student in Materials Engineering, University of Antioquia, Medellín, Colombia.

Juan Marcelo Rojas Arango, University of Antioquia

Professor at the Department of Metallurgical and Materials Engineering, University of Antioquia, Medellín, Colombia.

References

W. Reif and G. Weber, “Grain refining copper alloys, UK patent GB2179673A.” pp. 1–13,

Maxwell, I. and A. Hellawell, Simple Model for Grain Refinement During Solidification. Acta Metallurgica, 1975. 23(2): p. 229-237.

Turnbull, D.; Vonnegut, B. "Nucleation catalysis", Industrial and Engineering chemistry, Vol.44, n. 6, pp. 1292-1298, 1952.

M. Johnsson, L. Backerud, and G. K. Sigworth, “Study of the mechanism of grain refinement of aluminum after additions of Ti- and B-containing master alloys,” Metall. Trans. A, vol. 24, no.2, pp. 481–491, 1993.

Greer, A.L., et al., Modeling of inoculation of metallic melts: Application to grain refinement of aluminum by Al-Ti-B. ActaMaterialia, 2000. 48(11): p. 2823-2835.

Tarshis, L.A., J.L. Walker, and J.W. Rutter, Experiments on Solidification Structure of Alloy

Castings.Metallurgical Transactions, 1971. 2(9): p. 2589-&.

A. Couture and J. O. Edwards, Grain refinement of sand cast bronzes and its influence on their properties., AFS transactions.1973; 32: 453-461

J. M. Rojas Arango, “REFINO DE GRÃO DAS LIGAS DO SISTEMA COBRE-ESTANHO” Escola Politécnica da Universidade de São Paulo, 2016.

ASTM, “ASTM B208-140: "Standard Practice for preparing tension test specimens for Copper Alloy Sand, Permanent Mold, Centrifugal and Continuous Castings1", ASTM, vol. 96, no Reapproved, pp. 1-9,2015

ASTM, “ASTM E8: Standard, A., E8," Standard Test Methods for Tension Testing of Metallic Materials. Annual book of ASTM standards, 2004. 3: p. 57-72.

ASTM, “ASTM E112-13: Standard test methods for determining average grain size,” ASTM Int., pp. 1–28, 2013.

Garcia,Amauri, "Macroestruturas de solificacao", In: "Solidificacao Fundamentos e Aplicacaoes", Livro Texto, 1sted., ch. 8, Editora da Unicamp, Brasil, 2001.

A. Green, J. Wesemael: Die cast eng., 2009, vol. 03, pp. 56-56

M. Möser, “Chapter 15 Fractography with the SEM (Failure Analysis),” Mater. Sci. Monogr.40 Electron Microsc. Solid State Physics., 2007.