Experimental Studies on Mechanical Properties of Carbon Nanotube Reinforced Aluminum 7075 Composite Material


  • Mahendra Kumar Chidananda Swamy Department of Mechanical Engineering, BNM Institute of Technology, 12th main, 27th cross, Banashankari 2nd stage, Bengaluru-560070,
  • Raghavendra Bommanahalli Venkatagiriyappa Department of Mechanical Engineering, JSS Academy of Technical Education, JSS campus road, Srinivaspura, Bengaluru-560060, India




In the present work multiwalled carbon nanotubes were added as reinforcement to aluminum 7075 matrix at 0.5%, 0.75% and 1.25% by weight proportion through stir casting technique. The mechanical properties of the produced composite were studied. The composite has considerably good tensile and wear resistance properties and hence finds its best suited application in aircraft frame and wings structures. Microstructure analysis through SEM showed a uniform distribution of the reinforcement material in the matrix. XRD graphs were taken at selected points during microscopic studies to determine the chemical composition of the matrix alloy, the reinforcement and the composite. The experimental results showed that 1.25% reinforcement in the composite material exhibited a tensile strength of 560 N/mm2 and a compression strength of 649.6 N/mm2 as the highest among the compositions. Thus, the reinforcement addition at 1.25% improved the tensile and compression strength of the composite material.


Raghavendra, N. & Ramamurthy, V.S., Development and Dry Sliding Wear Map for Al 7075/Al2O3, Materials Today: Proceedings, 5, pp. 24104-24113, 2018. DOI: 10.1016/j.matpr.2018.10.204.

Savina, J. & Raghavendra, B.V., Investigation on Influence of Anionic Surfactant for Homogenization of MWCNT in Aluminium 6065 Matrix, IIUM Engineering Journal, 21(2), pp. 186-189, 2020. DOI: 10.31436/ iiumej.v21i2.1317.

Bamane, O., Patil, S., Agarwal, L. & Kuppan, P., Fabrication and Characterization of AA7075 Metal Matrix Composite Reinforced with MWCNT, Materials Today Proceedings 5, pp. 8001-8007 2018. DOI: 10.1016/j.matpr.2017.11.484.

Ulhas. K., Annigeri, G.B. & Kumar, V., Method of Stir Casting of Aluminum Metal Matrix Composites: A Review, Materials Today: Proceedings, 4, pp. 1140-1146, 2014. DOI:10.1016/j.matpr.2017.01.130.

Saravanan, C. & Subramanian, K., Tribological Behavior of AA7075-TiC Composites by Powder Metallurgy, 70(6), pp. 1066-1071, 2017. DOI: 10.1108/ILT-10-2017-0312.

Balachandar, R., Balasundaram, R. & Rajkumar, G., Dry Sliding Wear Characteristics of Aluminum 6061-t6, Magnesium Az31 and Rock Dust Composite, Materials Science and Engineering, 314, 012013, 2018. DOI:10.1088/1757-899X/314/1/012013.

Aranke, O. & Gandhi, C., Influence of Multiwall Carbon Nanotube(MWCNT) on Wear and Coefficient of Friction of Aluminum Metal Matrix Composite, Materials Today Proceedings, pp. 7748-7757, 2018. DOI; 10.1016/J.MATPR.2017.11452.

Sahu, M. & Sahu, R., Fabrication of Aluminum Matrix Composites by Stir Casting Technique and Stirring Process Parameters Optimization, Intechopen, London, United Kingdom, 2018. DOI: 10.5772/intechopen.73485.

Vinoth babu, N. & Moorthy, Dr. T.V., Synthesis and Characterization of Al7075/SiC Composite by Stir Casting, Applied Mechanics and Materials, pp. 592-594, 2014. DOI: 10.4028/www.scientific.net/AMM.592-594 760.

Suresh, S., Sudhakara, D. & Yinod, B., Investigation on Mechanical, Wear and Machining Characteristics of Al 7075/MWCNTs Using the Liquid State Method, Advanced Composites and Hybrid Materials, 3, pp.243-254, 2020. DOI: 10.1007/s42114-020-00156-2.

Sambathkumar, M. & Navaneethkrishnan, P., Mechanical and Corrosion Behavior of Al7075 Hybrid Metal Matrix Composites by Two Step Stir Casting Process, Latin American Journal of Solids and Structures, pp. 243-255, 2017. DOI:10.1590/1679-78253132.

Sayuti, M., Allajji, M. & Sulaiman, S., Mechanical Properties and Morphological Analysis of Copper Filled Aluminium Alloy Hybrid Matrix Composites, Journal of Engineering and Technological Sciences, 52(6), pp. 855-866, 2020. DOI:10.5614/j.eng.technol.sci.2020.52.6.6.

Manikandan, K., Jeeva, S. & Santhosh, G., Investigation of Wear Resistance and Mechanical Properties of CNT Reinforced Aluminum 7075 Alloy for Gear Applications, International Journal of Scientific & Technology Research, 9(6), pp. 446-454, 2020.

Pradeep, K.S. & Satheesh, J., A Study on Tensile, Hardness and Impact Strength Using Al7075 as Matrix Material and by Using Different Reinforcement, International Research Journal of Engineering and Technology(IRJET), 5(7), pp.964-967, July 2018.

Yildirim, M., yek, D & G M., Investigation of Microstructure and Wear Behaviors of Al Matrix Composites Reinforced by Carbon Nanotube, Fullerenes, Nanotubes and Carbon Nanostructures, 24(7), pp. 467-473, 2016. DOI: 10.1080/1536383X.2016.1182504.

Pillewan, V.J. & Raut, D.N., Microscopic Analysis of Carbon Nano Tubes based Metal Matrix Composite, Nirma University Journal of Engineering and Technology, 4, pp.6-10, 2015. DOI: 10.1186/s42649-019-0024-2.

Udupa, G., Rao, S.S. & Gangadharan K.V., Fabrication of Functionally Graded Carbon Nanotube-Reinforced Aluminium Matrix Laminate by Mechanical Powder Metallurgy Technique, Material Science & Engineering, 4(3), 1000169, 2015. DOI:10.4172/2169-0022.1000169.

Grace, X. & Dimas, L., Optimization of Composite Fracture Properties, ASME Journal of Applied Mechanics, 83(7), 071006, May 2016. DOI: 10.1115/1.4033381.