Study of Mechanical and Wear Properties of Stir-Cast Al-Si-Cu alloy

  • Abstract
  • Keywords
  • References
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  • Abstract

    The present work deal with an investigation of the mechanical and wear properties of eutectic Al-12.8%Si-2.5%Cu under as cast and homogenized conditions. The alloy was melted in a ceramic crucible, stirred and gravity poured into a metal mold and was then cooled under atmosphere. The stirring parameters include a stirrer speed of 400rpm at a melt temperature of 7500C for about 10 minutes. The cast specimens were homogenized in a nitrogen atmosphere crucible at a temperature of 3500C for 8 hours and furnace cooled to room temperature. The microstructure of as cast and homogenized specimen were studied under SEM. The results of SEM study showed that the Si particles were more evenly dispersed around the a-Al matrix after homogenization. This even dispersion of Si particles led to an increase in the hardness and ultimate tensile strength of the alloy. The dry sliding wear behavior was studied using a pin-on-disc machine. It is seen that the wear rate reduced with increase in sliding speed. The EDAX analysis of worn surface showed the phenomenon of lamination. It is concluded that the oxide layer formation was also a reason for increase in wear resistance of the material.



  • Keywords

    Al-Si-Cu alloy;EDAX;Homogenization;SEM;Stir casting.

  • References

      [1] Clarke, J.; Sarkar, A. D. Wear characteristics of as-cast binary aluminium-silicon alloys. Wear1979, 54, 7–16, doi:10.1016/0043-1648(79)90044-9.

      [2] Haque, M. M.; Sharif, A. Study on wear properties of aluminium-silicon piston alloy. J. Mater. Process. Technol.2001, 118, 69–73, doi:10.1016/S0924-0136(01)00869-X.

      [3] In, A. T.; Fulfilments, P.; Requirements, O. F.; The, F. O. R.; Of, A.; Degree, T. H. E. WEAR STUDIES OF Al-Si ALLOYS A THESIS IN PARTIAL FULFILMENTS OF REQUIREMENTS Bachelor of Technology WEAR STUDIES OF Al-Si ALLOYS Bachelor of Technology. 2014, 1–48.

      [4] Kaya, H.; Aker, A. Effect of alloying elements and growth rates on microstructure and mechanical properties in the directionally solidified Al–Si–X alloys. J. Alloys Compd.2017, 694, 145–154, doi:10.1016/j.jallcom.2016.09.199.

      [5] Zeren, M.; Karakulak, E.; GÜmÜ, S. Influence of Cu addition on microstructure and hardness of near-eutectic Al-Si-xCu-alloys. Trans. Nonferrous Met. Soc. China (English Ed.2011, 21, 1698–1702, doi:10.1016/S1003-6326(11)60917-5.

      [6] Saheb, N.; Laoui, T.; Daud, A. R.; Harun, M.; Radiman, S.; Yahaya, R. Influence of Ti addition on wear properties of Al – Si eutectic alloys. 2001, 249, 656–662.

      [7] Yang, H.; Ji, S.; Fan, Z. Effect of heat treatment and Fe content on the microstructure and mechanical properties of die-cast Al-Si-Cu alloys. Mater. Des.2015, 85, 823–832, doi:10.1016/j.matdes.2015.07.074.

      [8] Raghukiran, N.; Kumar, R. Materials Science & Engineering A Effect of scandium addition on the microstructure , mechanical and wear properties of the spray formed hypereutectic aluminum – si- licon alloys. Mater. Sci. Eng. A2015, 641, 138–147, doi:10.1016/j.msea.2015.06.027.

      [9] Han, L.; Sui, Y.; Wang, Q.; Wang, K.; Jiang, Y. Effects of Nd on microstructure and mechanical properties of cast Al-Si-Cu-Ni-Mg piston alloys. J. Alloys Compd.2017, 695, 1566–1572, doi:10.1016/j.jallcom.2016.10.300.

      [10] Haque, M. M. Effects of strontium on the structure and properties of aluminium-silicon alloys. J. Mater. Process. Tech.1995, 55, 193–198, doi:10.1016/0924-0136(95)01953-7.

      [11] Haque, M. M.; Maleque, M. A. Effect of process variables on structure and properties of aluminium – silicon piston alloy. 1998, 77, 122–128.

      [12] Manasijevic, S.; Radisa, R.; Markovic, S.; Acimovic-Pavlovic, Z.; Raic, K. Thermal analysis and microscopic characterization of the piston alloy AlSi13Cu4Ni2Mg. Intermetallics2011, 19, 486–492, doi:10.1016/j.intermet.2010.11.011.

      [13] Zeren, M. The effect of heat-treatment on aluminum-based piston alloys. Mater. Des.2007, 28, 2511–2517, doi:10.1016/j.matdes.2006.09.010.

      [14] Bacaicoa, I.; Dwivedi, P. K.; Luetje, M.; Zeismann, F.; Brueckner-Foit, A.; Geisert, A.; Fehlbier, M. Effect of non-equilibrium heat treatments on microstructure and tensile properties of an Al-Si-Cu alloy. Mater. Sci. Eng. A2016, 673, 562–571, doi:10.1016/j.msea.2016.07.080.

      [15] Costa, T. A.; Dias, M.; Gomes, L. G.; Rocha, O. L.; Garcia, A. Effect of solution time in T6 heat treatment on microstructure and hardness of a directionally solidified Al-Si-Cu alloy. J. Alloys Compd.2016, 683, 485–494, doi:10.1016/j.jallcom.2016.05.099.

      [16] Feyzullahoǧlu, E.; Ertürk, A. T.; Güven, E. A. Influence of forging and heat treatment on wear properties of Al-Si and Al-Pb bearing alloys in oil lubricated conditions. Trans. Nonferrous Met. Soc. China (English Ed.2013, 23, 3575–3583, doi:10.1016/S1003-6326(13)62903-9.

      [17] Dr. Ilangovan S., Shanmugasundaram, A., and Arul, S., “Influence of Specimen Temperature on Wear Characteristics of AA6063 Aluminium Alloy”, Journal of Surface Science and Technology, vol. 32, pp. 93–98, 2016.

      [18] Dr. Ilangovan S., “Effects of Solidification Time on Mechanical Properties and Wear Behaviour of Sand Cast Aluminium Alloy”, International Journal of Research in Engineering and Technology, vol. 3, pp. 71-75, 2014.

      [19] Dr. Radhika N and K. Charan, S., “Experimental Analysis on Three Body Abrasive Wear Behaviour of Stir Cast Al LM 25/TiC Metal Matrix Composite”, Transactions of the Indian Institute of Metals, pp. 1-8, 2017.




Article ID: 11890
DOI: 10.14419/ijet.v7i2.23.11890

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