Effect of Nanoreinforcement on Fabrication of Al/Al₂O₃ Surface Composite by Friction Stir Processing

Abstract:

In this investigation, the effect of nanoreinforcement particles such as Al₂O₃, tool rotational speed and traverse speed on microstructure and mechanical properties of Al/Al₂O₃ surface nanocomposites fabricated by friction stir processing was studied. The surface nanocomposites were produced by varying volume percentage of nanoreinforcement, tool rotational speed and traverse speed to attain the best outcome. The fabricated composites were characterized through microstructural evaluation, microhardness measurements and energy dispersive spectroscopy analysis. Microstructural evaluation of the composites revealed that the composites were produced finer grain structure in this stir zone and it is evident for, a dynamic recrystallization was taken place. Higher hardness values were found at the stir zone of the entire composite because of the equiaxed and well dispersion of reinforced particles. The energy dispersive spectroscopy analysis revealed the presence of various elements at the stir zone. A defect free parameter setting for friction stir processing of Al/Al₂O₃ was obtained at 1120 rpm and 16 mm/min.

• Periodical: Materials Science Forum (Volumes 830-831)
• Pages: 467-471
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.830-831.467
• Online since: September 2015
• Authors: P. Naresh*, Adepu Kumar
• Keywords: Friction Stir Processing, Microstructure, Tool Rotational Speed, Traverse Speed

References

[1] D. Yadav, R. Bauri, Nickel particle embedded aluminium matrix composite with high ductility, Mater. Lett. 64 (2010) 664–667.

DOI: 10.1016/j.matlet.2009.12.030

[2] T.W. Clyne, P.J. Withers, An Introduction to Metal Matrix Composites, Acta mater. 44 (1996) 3801-3811.

[3] E.R.I. Mahmoud, M. Takahashi, T. Shibayanagi, K. Ikeuchi, Wear characteristics of surface-hybrid-MMCs layer fabricated on aluminum plate by friction stir processing, Wear. 268 (2010) 1111–1121.

DOI: 10.1016/j.wear.2010.01.005

[4] K.G. Budinski, Surface Engineering for Wear Resistance, Prentice-Hall, New Jersey, (1988).

[5] R.S. Mishra, M.W. Mahoney, S.X. McFadden, N.A. Mara, A.K. Mukherjee, High strain rate superplasticity in a friction stir processed 7075 al alloy, Scripta Mater. 42 (2000)163.

DOI: 10.1016/s1359-6462(99)00329-2

[6] W.M. Thomas, E.D. Nicholas, J.C. Needham, M.G. Murch, P. Temple smith, C.J. Dawes, G.B. US Patent, 5, 460, 317. (1991).

[7] B. Zahmatkesh, M.H. Enayati, A novel approach for development of surface nanocomposite by friction stir processing, Mater. Sci. Eng, A. 527 (2010) 6734–6740.

DOI: 10.1016/j.msea.2010.07.024

[8] M. Sharifitabar, A. Sarani, S. Khorshahian, M. Shafiee Afarani, Fabrication of 5052 Al/Al2O3 nanoceramic particle reinforced composite via friction stir processing route, Mat. Des. 32 (2011) 4164–4172.

DOI: 10.1016/j.matdes.2011.04.048

[9] Xiaopeng Hou, Xinqi Yang, Lei Cui, Guang Zhou., Influences of joint geometry on defects and mechanical properties of friction stir welded AA6061-T4 T-joints, Mat. Des. 53 (2014) 106–117.

DOI: 10.1016/j.matdes.2013.06.061