ABSTRACT In recent decades, aluminium alloy based metal matrix composites are used in several applications. Al6061 has been used as matrix material due to its good formability, excellent mechanical properties and etc., wide spectrum of the applications in industrial sectors. Inclusion of Frit particulates as reinforcement in Al6061 alloy material system improves its hardness and decrease in density. In the present investigation Al6061-Frit particulate composites were produced by ‘VORTEX’ method with varying weight percentages of Frit particulate from 0 wt% to 10 wt% in steps of 2.The as cast matrix alloy and its composites have been subjected to solutionizing treatment at a temperature of 530℃ for 2 hours followed by quenching in different media such as air, water and ice. The quenched specimens were subjected to artificial ageing. Aged specimens were subjected to ultra-sonic test using ultra-sonic flaw detector testing apparatus to identify the common casting defects like porosity, blow holes. Macrostructure and microstructure studies were conducted on as cast and composites in order to investigate the distribution of frit particles retained in matrix material system. Micro structural studies were carried out to understand nature of structure. Density measurement was carried out on both Al6061matrix alloy and Al6061-Frit particulate composite. Hardness tests have been conducted both on Al6061 matrix alloy and Al6061-Frit particulate composite before and after heat treatment. It has been observed under identical heat treatment conditions adopted, Al6061-Frit particulate composites exhibited significant improvement in hardness when compared with Al6061 alloy.
Cite this paper
D. Ramesh, R. Swamy and T. Chandrashekar, "Role of Heat Treatment on Al6061- Frit Particulate Composites," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 4, 2012, pp. 353-363. doi: 10.4236/jmmce.2012.114026.
 A.R.Answar khan, C.S.Ramesh and A.Ramachandra, 2002, “Heat treatment of Al6061-SiC composites”, proceedings of international companies on manufacturing (Dhaka ICM) pp 21-28.
C.S.Ramesh, A.R.Answar khan, Ravikumar and Savanprabhu, “Prediction of wear co-efficient of Al6061-TiO2 composites”, Wear 259, (2003), 602-608.
Appendino.P, Badini.C, Marino.F, and Tomari.A, 1991. J. Mater. Sic & Eng. A 135. 275,
Salvo and Surey.M, 1924. J. Mater. Sic & Eng. A 34.709.
M.Gupta, and M.K.Surappa, “Effect of wt% of SiC particulates on the ageing behaviour of Al6061/SiC MMC`s”, Journal of Material Science, 14(1995), 1283-1285.
B.N. Pramila Bai ,B.S.Ramasesh , and M.K.Surappa , “Dry sliding wear of A356-Al-SiCp”, Wear 157, ( 1992), 295-304 ,
Doel T.J.A and Bowen P, 1996, composites A27, 655.
Gui.M.C, Wang D.B, W.J.J. Yana G.J and Gli.C 2000 J. Mater. Sic & Techno, 16, 556.
Rajan.T.V, Sharma C.P, Ashok Sharma, 1998, Heat treatment principles Techniques, Rajkamal Electric Press, India, Page 142-149.
Davis.J.R, 1993, Aluminium and aluminium alloys, in ASM specially Hand book, ASM international, Metal Parts, Ohio.
W.D.Callister , Journal Material Science & Engineering, 1997, 511-531.
Rollanson E.C, 1998, Metallurgy for engineers, Edward Arnold Ltd, London.
H.Ribes, M.Surey, Sci metal 23 (1989) 705-709,
G.M.Janoswki, B.J.Pletka, metal mater. A 26 (1995) 3027-3034.
P.Appendino, C.Badini, Mater. Sci& Eng. A 135 (1991). 275-279.
Z.M.El-Baradie, O.A.El-Shah at, A.N. Abd El-Ajim, J.Mater. Process. Technology 79 (1998) 1-8.
V.Amigo, J.L.Ortiz, M.O.Salvador, Serim 12(2000) 383-388.
L.Sulvo, G.L.Esperance, M.Surey, J.G. legoux. Mater.Sci.Eng A 177 (1994) 173-183.
M.Ramachandra, K.Radhakrishna,”Sliding wear, slurry erosive wear, and corrosive wear of aluminium/SiC composite, Materials Science-Poland, Vol.24, No 2/1, 2006.
M.D.Bermudeza, G. Martinez-Niccolas, F.J.Carrion, I. Martin-Mateo, J.A.Rodriguez, E.J.Herrera,”Dry and lubricated wear resistance of mechanically-alloyed aluminium-base sintered composites”, Wear 248,178-186, 2001.
S.N.Ahmad, J.Hashim, and M.T.Ghazali, ”The effect of porosity on Mechanical Properties of Cast Discontinuous Reinforced Metal-Matrix composites”, Journal of composite Materials, Vol.39, No 5/2005, pp 451-466.
V.S.Aigbodin and S.B. Hassan, “Effects of Silicon carbide reinforcement on Microstructure and properties of cast Al – Si – Fe / SiC particulate composites”, Journal of material sciences and Engineering A, 2007,447,355-360.
I. A. Ogucha, “Characterization of Aluminium alloy 2618 and its composites containing alumina particles”, Ph.D. Dissertation, Department of mechanical Engineering, University of Saskatchewan, Saskanoon, 1997, 1-200.
V.S.Aigbodion, J.O.Agunsoye,V.Kalu,F.asuke,S.Ola, “Microstructure and Mechanical properties of ceramic composites”,JMMCE,Vol.9,No.6,pp527-538,2010.
N.R.Prabhu Swamy, C.S.Ramesh and T.Chandrashekar, “Effect of heat treatment on strength and abrasive wear behaviour of Al6061-SiCp composites”, Bull Mater. Sci., Vol 33, No 1, February 2010, pp 49-54.