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Aging Behaviour of 6061 Al-15 vol% SiC Composite in T4 and T6 Treatments

Authors: Melby Chacko, Jagannath Nayak

Abstract:

The aging behaviour of 6061 Al-15 vol% SiC composite was investigated using Rockwell B hardness measurement. The composite was solutionized at 350°C and quenched in water. The composite was aged at room temperature (T4 treatment) and also at 140°C, 160°C, 180°C and 200°C (T6 treatment). The natural and artificial aging behaviour of composite was studied using aging curves determined at different temperatures. The aging period for peak aging for different temperatures was identified. The time required for attaining peak aging decreased with increase in the aging temperature. The peak hardness was found to increase with increase with aging temperature and the highest peak hardness was observed at 180ºC. Beyond 180ºC the peak hardness was found to be decreasing.

Keywords: aging curve, Rockwell B hardness, T6 treatments

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1091608

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References:


[1] R. R. Winston, "Metal Matrix Composites,” in Uhligs Corrosion Handbook, 3rd ed. John Wiley &SonsPublications, New Jersey,2011, pp. 481-490.
[2] D. J.Lloyd, "Particle reinforced aluminium and magnesium matrix composites,”International Materials Reviews, vol.39,1994, pp. 1-23.
[3] P. Appendino, C. Badini, F. Marino, and A. Tomasi A, "6061 Aluminium alloy- SiC particulate composite: a comparison between aging behavior in T4 and T6 treatments,”Materials Science and Engineering, vol. A135, 1991, pp. 275-279.
[4] Z. Min, W. Gaohui, and J. Lonhtao, "Aging behavior and precipitation kinetics of sicp/6061al composites,” Journal of Materials Science vol. 39, 2005, pp. 1759-1763.
[5] F. Ozturk, A. Sisman, S. Toros, S. Kilic, and R. C. Picu, " Infleunce of aging treatment on mechanical properties of 6061 aluminium alloy,” Materials and Design, vol. 31, 2010, pp. 972-975.
[6] G. M. Nowotnik, and J. Sieniawski, "Influence of heat treament on the microstructure and mechanical properties of 6005 and 6082 aluminium alloys,”Journal of Material Processing Technology,vol.162, 2005, pp. 367-372.
[7] S. Rajasekaran, N. K. Udayashankar, and J. Nayak, "T4 and T6 treatment of 6061 Al-15 vol% SiCp composite,” International Scholarly Research Network, vol. 2012, 2012, pp.1-5.
[8] L. K. Berg, J. Gjonnes, V. Hansen, X. Z. Li, M. K. Wedel, G. Waterloo, D. Schryvers, and L. R. Wallenberg, "GP- Zonesin Al-Zn-Mg alloys and their role in artificial aging,” Acta Mater, vol. 49, 2001, pp. 3443-3451.
[9] L. Sagalowicz, G Lapasset, and G. Hug, " Transmission electron microscopy study of a precipitate which forms in the Al-Mg-Si system,”Philosophical Magazine, vol. 74, 1996, pp. 57-66.
[10] H. K. Ahn, and C. H. Yu, "Effect of SiC volume fraction on the age-hardening behavior in SiC particulate-reinforced 6061 aluminium alloy composite,” Metals and Materials International, vol.7, 2001, pp. 1-7
[11] T. Christman, and S. Suresh, "Microstructural development in an aluminium alloy- SiC whisker composite,” Acta Metall. vol. 36, 1988, pp. 1691-1704.
[12] D. Yu, and T. Chandra, "Age hardening in 6061 Al alloy and Al2O3/ 6061 Al composite,” Materials Transactions,vol 34, 1993, pp. 1184-1190.
[13] A. Borrego, and G. Gonzalez, "On the stability with temperature of the dislocation structure in 6061 Al-15vol% SiC composite as studied by hardness and differential scanning calorimetry,” Journal of Materials Science, vol. 38, 2003, pp. 2761-2765.
[14] C. D. Marioara, S. J. Anderson, T. N. Stene, H. Hasting, J. Walmsley, A. T. J. Vanhelvoort, and R. Holmestad, "The effect of Cu precipitation in Al-Mg-Si alloys,” Philosophical Magazine, vol. 87, 2007, pp. 3385-3413.