Wear Performance Analysis of Aluminum Matrix Composites and Optimization of Process Parameters Using Statistical Techniq
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matrix composites (AMCs) are superior quality advanced materials that combine a soft metal matrix with a hard reinforcement.[1] Al alloys (AAs) are used as a matrix material in AMCs, which are widely utilized in various applications such as in manufacturing automobiles and aerospace parts owing to their several advantageous properties such as light weight, low cost, high stiffness, and high dimensional stability, which aid in molding the material into the required shapes and sizes. Using AAs reinforced by particulates is the most promising way to enhance the wear properties of any metal matrix composite (MMC). Reinforcing AAs using silicon carbide (SiC),[2–9] alumina (Al2O3),[10–12] carbon nanotubes (CNT),[13,14] and graphene nanoplatelets (GNP)[15,16] has been reported to enhance the mechanical properties of AMCs. These reinforcements have AMIR HUSSAIN IDRISI is with the Department of Mechanical Engineering, UAE University, P.O. Box 15551, Al-Ain, UAE. ABDEL-HAMID ISMAIL MOURAD is with Department of Mechanical Engineering, UAE University and also with the Mechanical Design Department, Faculty of Engineering, Helwan University, P.O. Box 11718, Cairo, Egypt. Contact e-mail: ahmourad@uaeu.ac.ae. Manuscript submitted March 8, 2019.
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been significantly explored recently to determine the most optimal route. Fathy et al.[16] fabricated Al-Al2O3/ GNP hybrid composites and compared them with Al-Al2O3 composites. Their results showed that the wear rate of Al-Al2O3 composite reinforced with 1.4 pct GNP decreased by 19 times compared to that the Al-Al2O3 composite without GNPs. Qutub et al.[17] investigated the wear behavior and friction coefficient of the Al 6061 alloy reinforced with 1 wt pct CNT. It was noted that the wear behavior and friction were significantly affected by the applied load. Furthermore, the critical load could have a negative impact on the wear resistance of the composite. The wear properties of CNT and Al2O3 composite were compared by Lu et al.[18] The wear performance of the Al2O3 composite was better that of the composite reinforced with CNT. Similarly, the wear performances of AMCs reinforced with SiC and Al2O3 were compared. The results demonstrated that SiC particles were more effective than Al2O3 particles in enhancing the wear resistance of AMCs because of their high hardness.[19] Thus, SiC should be preferably used as reinforcement. The stir casting method has been widely used by various researchers. Sajjadi et al.[20] fabricated AA/ Al2O3 micro- and nanocomposites using stir casting and observed improved hardness and compressive strength and increased porosity for a higher weight percentage of Al2O3 nanoparticles. Ezatpour et al.[21] prepared Al
6061 nanocomposites using stir casting to investigate the effects of adding Al2O3 nanoparticles to the Al 6061 alloy and the effects of the extrusion process on the mechanical and microstructural properties of the composites. They found a reasonable distribution of Al2O3 in the matrix alloy with low agglomeration and
