Effect of Alloying on the Microstructure and Strength of the Ni Bronzes

Year 2021, Volume: 16 , 8 - 13, 31.12.2021

Ibrahim Celıkyurek Bedri Baksan Adem Tasdemır

https://doi.org/10.55549/epstem.1052202

Abstract

In this study, Al was added to the Cu15Ni8Sn Ni-bronze alloy. The effects of the added amount of Al on the microstructure and strength of the alloy were investigated. As an approach, the Sn element has been replaced by Al. The element Al was added at 2, 4, 6, and 8 wt. %. Alloys were melted in a graphite crucible by induction melting and poured into a graphite mold. No heat treatment was applied to the cast alloys. The microstructure of the alloys was studied under a light optical microscope (LOM) and scanning electron microscope (SEM). Mechanical characterizations were made by hardness measurement and tensile tests. Metallographic studies showed that the microstructure was not changed with the amount of Al added. Chemical composition changes in the phases were reflected in the mechanical properties. It was determined that the composition with the highest hardness and strength among the alloys was the composition containing 15Ni, 4Sn, and 4Al wt.%. The alloy with the highest ductility and toughness is Cu15Ni8Al.

Keywords

Ni-bronze, High strength, Alloying, Hardness

References

• Hoang, A. T., Nguyen, L. H., & Nguyen, D. N. (2018). A study of mechanical properties and conductivity capability of CU-9NI-3SN ALLOY. Int. J. Appl. Eng. Res, 13(7), 5120-5126.
• Hui, Z., Yizhu, H., Xiaomin, Y., & Ye, P. (2010). Microstructure and age characterization of Cu–15Ni–8Sn alloy coatings by laser cladding. Applied surface science, 256(20), 5837-5842.
• Van Hunnik, E. W. J., Colijn, J., & Schade van Westrum, J. A. F. M. (1992). Heat treatment and phase inter-relationships of the spray cast Cu-15 wt% Ni-8 wt% Sn alloy. In Materials Science Forum (pp. 115-124). Trans Tech Publications Ltd.
• Ilangovan, S., & Sellamuthu, R. (2016). Measurement of the variation of mechanical properties with aging temperatures for sand cast Cu-5Ni-5Sn alloy. Journal of Engineering Science and Technology, 11(11), 1609-1619.
• Lei, Q., Li, Z., Dai, C., Wang, J., Chen, X., Xie, J. M., ... & Chen, D. L. (2013). Effect of aluminum on microstructure and property of Cu–Ni–Si alloys. Materials Science and Engineering: A, 572, 65-74.
• López-Hirata, V. M., Arias-Pérez, Á. D. J., & Saucedo-Muñoz, M. L. (1999). A study of precipitation in a Cu-15 wt% Ni-8 wt% Sn alloy. Journal of materials science letters, 18(20), 1697-1699.
• Luo, B., Li, D., Zhao, C., Wang, Z., Luo, Z., & Zhang, W. (2019). A low Sn content Cu-Ni-Sn alloy with high strength and good ductility. Materials Science and Engineering: A, 746, 154-161.
• Peng, G., Gan, X., Jiang, Y., Li, Z., & Zhou, K. (2017). Effect of dynamic strain aging on the deformation behavior and microstructure of Cu-15Ni-8Sn alloy. Journal of Alloys and Compounds, 718, 182-187.
• Sato, A., Katsuta, S. I., & Kato, M. (1988). Stress aging of a Cu-10Ni-6Sn spinodal alloy. Acta Metallurgica, 36(3), 633-640.
• Singh, J. B., Cai, W., & Bellon, P. (2007). Dry sliding of Cu–15 wt% Ni–8 wt% Sn bronze: Wear behaviour and microstructures. Wear, 263(1-6), 830-841.
• Yin, B., Yin, Y., Lei, Y., Dong, L., & Zhang, Y. (2011). Experimental and density functional studies on the corrosion behavior of the copper-nickel-tin alloy. Chemical Physics Letters, 509(4-6), 192-197.
• Zhao, J. C., & Notis, M. R. (1998). Spinodal decomposition, ordering transformation, and discontinuous precipitation in a Cu–15Ni–8Sn alloy. Acta materialia, 46(12), 4203-4218.