Effect of Heat Treatment on Corrosion Behaviour of Al6061 Alloy and its SiC Reinforced Composites
Keywords:
Al6061, SiC, Corrosion, Heat Treatment, Electron MicroscopyAbstract
In the present work, Al6061 alloy with varying composition of 2% - 10wt% in steps of 2wt. % SiC particles reinforced composites were developed using conventional stir casting process. The cast composites have been subjected to solutionizing heat treatment at a temperature of 5250 ± 20C for 6 hours followed by ageing at a temperature of 1750 ± 20C for 6 hours. The Corrosion testing of Al6061-SiC composites was conducted using potentiodynamic polarization electrochemical methods. The Al6061 alloy and its composites after heat treatment process displayed low corrosion rate and high corrosion resistance when compared to that of as cast ones. As cast Al6061 composite with 10% SiC content has undergone more corrosion than any other Al6061-SiC composite. The Al6061-2%SiC composite system had low corrosion rate than rest of the composites. Based on strong interfacial bonding with matrix material and less number of micro-porosities, the heat treated alloy and composites displayed less corrosion rate and high corrosion resistance.
References
- ASM Handbook, Composites. ASM International, Vol 21, pp1029-1032, 2001.
- M K Surappa, Sadhana, Vol 28, pp319-334. 2003.
- Lokesh T, U. S. Mallik, Effect of ECAP process on the Microstructure and Mechanical Properties of Al6061-Gr Composites, Materials today Proceedings, Elsevier, Vol 5, pp2453-2461, 2018.
- M.A. Taha, Practicalization of cast metal matrix composites (MMCCs), Materials and Design Vol 22, pp 431-441, 2001
- S. Elomari, R. Boukhili, D.J. Lloyd, Thermal expansion studies of prestrained Al2O3/Al metal matrix composites, Compos. Sci. Technol. 44, 1873. 1996.
- S.C. Sharma, Effect of aging on oxidation behaviour of aluminum–albite composites at high temperatures, J. Mater. Engng Perf. 9, 344–349, 2000.
- Lokesh T, Mallikarjuna H M, U S Mallik, Effect of Heat Treatment on Corrosion behaviour of Al6061 alloy and its graphite reinforced composites, International Journal of Emerging Technologies and Innovative Research, ISNN: 2349-5162, 2019.
- M. Saxena, A.K. Jha, G.S Upadhyaya, Corrosion behaviour of sintered 6061 alloy-graphite particle composites, Journal of Materials Science, Vol28, pp4053-4058, 1993.
- M. Almomani, A.M. Hassan, T. Qasim, A. Ghaithan, Effect of process parameters on corrosion rate of friction stir welded aluminium SiC–Gr hybrid composites, Corrosion Engineering, Science and Technology, Vol 48, pp346-353, 2013.
- [8]. Z. Ahmad, B.J.A. Aleem, The mechanical properties and localized corrosion of Al 6092 composite in arabia seawater, Materials and Manufacturing Processes, Vol18, pp643-651, 2003.
- X. Wang, G. Chen, W. Yang, Q. Guo, G. Wu, D. Jiang, Effect of Magnesium Content on the Corrosion Behaviors of Grf/Al Composite, Metallurgical and Materials Transactions A 41, pp3458-3462, 2010.
- M. Rahsepar, H. Jarahimoghadam, The influence of multipass friction stir processing on the corrosion behaviour and mechanical properties of zircon-reinforced Al metal matrix composites, Materials Science & Engineering A 671, pp214–220, 2016.
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