Optimization of wear parameters of binary Al−25Zn and Al−3Cu alloys using design of experiments
- 41 Downloads
Zinc-aluminum alloys have been used as bearing materials in the past. In recent years, binary Al−Zn alloys and Al−Zn−Cu alloys are being used as an alternative to the Zn−Al alloys for bearing applications. In this study, both binary Al−25Zn and Al−3Cu were prepared using stir casting process. Homogenization of the as-cast alloys was performed at 350ºC for 8 h and then, the alloys were furnace-cooled to 50ºC. The homogenization led to the removal of the dendritic structure of the as-cast alloys. After homogenization, wear parameters optimization was carried out using Taguchi technique. For this purpose, L9 orthogonal array was selected, and the control parameters selected are load, velocity, and sliding distance. The optimum parametric condition was obtained using signal-to-noise (S/N) ratio analysis, and specific wear rate (SWR) is the selected response. The “smaller-the-better” is the goal of the experiment for S/N ratio analysis. After the optimization, confirmation tests were carried out using analysis of variance (ANOVA) from the developed regression equation. Finally, wear mechanism studies were conducted using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) images.
Keywordsspecific wear rate micro-hardness Taguchi technique signal-to-noise ratio analysis of variance aluminum-zinc alloy aluminum-copper alloy
Unable to display preview. Download preview PDF.
- M. Babic, S. Mitrovic, and R. Ninkovis, Tribological potencial of zinc–aluminium alloys improvement, Tribol. Ind., 31(2009), No. 1–2, p. 15.Google Scholar
- A.E. Al–Rawajfeh and S.M.A. Al–Qawabah, Investigation of copper addition on the mechanical properties and corrosion resistance of commercially pure aluminum, Emir. J. Eng. Res., 14(2009), No. 1, p. 47.Google Scholar
- A.N. Kumar, R. Srinivasu, and J.B. Rao, Dry sliding wear behavior of pure aluminium and Al−Cu alloys, [in] Technical Sessions—Proceedings of CIST2008 & ITS–IFToMM2008, Beijing, 2008, p. 422.Google Scholar
- B.C. Mouli, D. Naresh, K.S.J. Prakash, and A.B. Krishna, Effect of copper content on wear properties of aluminium alloy, J. Chem. Pharm. Sci., 10(2017), No. 2, p. 1059.Google Scholar
- T. Savaşkan, O. Bican, and Y. Alemdağ, Developing aluminium− zinc–based a new alloy for tribological applications, J. Mater. Sci., 4 (2009), No. 8. p. 1969.Google Scholar
- T. Savaşkan and Y. Alemdağ, Effect of nickel additions on the mechanical and sliding wear properties of Al−40Zn−3Cu alloy, Wear, 268 (2010), No. 3–4, p. 565.Google Scholar
- K.S. Arunagiri and N. Radhika, Studies on adhesive wear characteristics of heat treated aluminium LM25/AlB2 composites, Tribol. Ind., 38(2016), No. 3, p. 277.Google Scholar
- S. Ilangovan, J. Sreejith, M. Manideep, and S. Harish, An experimental investigation of Cu−Ni−Sn alloy on microstructure, hardness and wear parameters optimization using DOE, Tribol. Ind., 40 (2018), No. 1, p. 156.Google Scholar