Mechanical Properties of AA 7075/Al2O3/SiC Nano-metal Matrix Composites by Stir-Casting Method

• Published in: Journal of the Institution of Engineers (India): Series D Vol. 100; no. 1; pp. 43 - 53
• Main Authors: Suresh, S., Gowd, G. Harinath, Deva Kumar, M. L. S.
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 05.04.2019; Springer Nature B.V
• Subjects: Aluminum base alloys; Aluminum oxide; Armed forces; Base metal; Commercial spacecraft; Composition; Engineering; Heat treatment; Magnesium; Mechanical properties; Metal matrix composites; Microstructure; Nanocomposites; Nanoparticles; Original Contribution; Silicon carbide; Weight reduction; Wettability; Nano-materials; AA 7075; Al; SiC; O
• ISSN: 2250-2122; 2250-2130
• DOI: 10.1007/s40033-019-00178-1

Demand rises in a worldwide series of the new materials at national and international level. The metal matrix nano-composites are extremely beneficial in several applications such as aerospace, automobile, armed forces, and other commercial applications due to lightweight and cost-effective. In the present study, three various hybrid compositions, namely nano-Al 2 O 3 (20–30 nm), nano-SiC (50 nm), and Mg 1 wt% (fixed), were used as reinforcement materials. Magnesium is to enhance the wettability of Al 2 O 3 and SiC particles in the Al matrix. The compositions are executed at 1.0, 2.0, 3.0, and also 4.0 weight % of nano-Al 2 O 3 and nano-SiC. The cast samplings undertake the tests like heat treatment, microstructural examination, density, tensile, hardness, impact, SEM, EDAX, and XRD analysis. SEM images subject that the nanoparticles relatively disperse as well as attain fine grain microstructure in the matrix. The results reveal that the reinforcement of nanoparticles in Al 7075 matrix substantially increases the mechanical behaviour when compared to base metal.