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Abstract
The aim of the present research is to study the effect of cadmium addition on microstructure and wear behavior of the alloy (Al-12%Si) under dry sliding conditions. Wear behavior was studied by using the Pin-On- Disc technique under different conditions at applied loads 5-20 N, at constant sliding speed and in constant time. The steel disc hardness was 35HRc. All alloys were prepared with different percentages of cadmium (1.0, 2.0, 3.0) wt%. Also the base alloy was prepared by melting and pouring the molten metal in a metallic mold. It was found that the cadmium addition to Al-Si matrix decreases the wear rate and improves the wear properties for alloys containing -Cd under loads above 10N. It was also found that the alloy Al-12%Si containing 3%Cd is the best alloy in wear resistance and friction coefficient. This is due to presence of the Cd-phase as cuboids or hard particles distributed in a eutectic matrix which reduces the friction coefficient at high loads (20N).
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References
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References
Abbas, M.K. and Ibrahim, E.K., 2003, "Effect of Copper and Magnesium Adding on Wear Behavior of (Al-Si)
Alloy," Engineering and Technology Journal, University of Technology, Baghdad - Iraq, Vol. 22(1), pp. 37-44.
Ashby, M.F. and Jones, D.R.H., 1980, "Engineering Materials, An Introduction to Their Properties and Application," Pergamon Press Ltd, Headington Hill- Hall, Oxford, England.
Askwith T.C., 1980, "The Basic Mechanisms of Wear," Surfacing Journal, Vol. 11(4), pp. 2-5.
ASM Materials, 2002, "Bismuth Added to Al-Si Alloy Enables Low Friction," Advanced Materials Progress.
ASTM., 1989, "Metals Test Method and Analytical Procedure," Vol. 05.02.
Basavakumar, K.G., Mukunda, P.G. and Chakraborty, M., 2007, "Influence of Melt Treatments on Sliding Wear Behavior of Al-7Si and Al-7Si-2.5Cu Cast Alloys," Journal of Material Science, Vol. 42, pp. 7882-7893.
Bolten, W., 1998, "Engineering Materials Technology," Butterworth's, 3rd ed.
Dana, E.C.H., 2001, "Information From Clevite Engine Parts Division, "Engine Bearing Fundamentals, Part 6 Bimetals," pp. 1-2.
Davis, J.R. and Associates, 1982, "ASM International Handbook Committee," by A.J. McAlister, p. 545.
Israa, A.K., 2005, "The Effect of Lead Addition on The Wear Resistance of Al-16%Si Alloy Under Dry Sliding," Journal of Engineering and Technology University of Technology, Baghdad, Vol.24(1), pp. 56-64.
Jawdat, A.G., 2002, "Effect of Some Additions on Wear Resistance and Mechanical Properties of (Al-8% Si)," M.Sc. Thesis, University of Technology, Baghdad , Iraq.
Lidman, W.G., "Aluminum Master Alloys and Additives, The Magic Ingredients," The Aluminum Association, Association's , website at www.aluminum.org.
Mikell, P. Groover, 1999, "Fundamentals of Modern Manufacturing Materials Processes and Systems," John, Wiley & Sons, Inc.
Mustafa, S.F., 1995, "Wear and Wear Mechanisms of Al- 22%Si -203 Composite," Wear, Vol. 185, p. 189.
Sreeja Kumar, S.S.., Pillai, R.M., Nogita, K., Dahle, A.K. and Pai, B.C., 2006, "A Influence of Calcium on the Microstructure and Properties of an Al-7%Si- 0.3%Mg- xFe Alloy," Metallurgical and Materials Transaction A, Vol.37A, p. 2581.
Stan Grainger., 1994, "Engineering Coatings Design and Application," Woodhead Publishing Ltd.
UNIDO., 1990, "Advances in Material Tech," Monitor Vienna International Center, Austria, pp. 9-11.
Zhang, Z., Garro, M. and Tagliano, C., 2003, "Dendrite Arm Spacing in Aluminum Alloy Cylinder Heads Produced by Gravity Semi- Permanent Mold," Metallurgical Science and Technology, A Journal Published by Teksid Aluminum Twice A year, Vol.21(1), pp. 1-9.