Nano-sized aluminum oxide reinforced commercial casting A356 alloy matrix: Evaluation of hardness,wear resistance and compressive strength focusing on particle distribution in aluminum matrix |
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| Affiliation: | 1. Department of Materials Science and Engineering, Semnan University, Semnan, Iran;2. Department of Materials Science and Engineering, MUT, Tehran, Iran;1. Department of Materials Processing Engineering, School of Mechanical Electrical Engineering, Nanchang University, Nanchang 330031, China;2. Nanchang institute of technology, Nanchang 330099, China;1. CHARUSAT, Changa, 388 421, Gujarat, India;2. Sardar Vallabhbhai Patel Institute of Technology, Vasad, 388306, Gujarat, India;3. Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda, Vadodara, 390 001, Gujarat, India;1. Department of Mechanical Engineering, Noida Institute of Engineering and Technology, Greater Noida, U.P Pin-201306, India;2. Department of Mechanical Engineering, Graphic Era Hill University, Deharadun (UK), India;3. Department of Mechanical Engineering, Greater Noida Institute of Technology, Greater Noida, U.P Pin-201310, India;1. School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, NSW 2522, Australia;2. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, Liaoning 110004, China;3. School of Electrical, Mechanical and Mechatronic Systems, University of Technology, Sydney, NSW 2007, Australia;4. Faculty of Materials Engineering, Sahand University of Technology, Tabriz, Iran;5. Department of Metallurgy, Zanjan Branch, Islamic Azad University, Zanjan 45156-58145, Iran |
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| Abstract: | Achieving a uniform distribution of reinforcement within the matrix is a challenge which impacts directly on the properties and quality of the composite material. In the present study a fabrication and evaluation approach was used focusing on particle distribution in metal matrix. Al and Cu powders were separately milled with nano-Al2O3 particles and incorporated into A356 alloy via vortex method to produce cylindrical A356/nano-Al2O3 composites. The stirring was carried out in various durations. The variations of density, hardness, compressive strength, and wear resistance were measured throughout the cylindrical samples. The evaluation of mechanical properties and microstructural studies showed that an increase in stirring time led to a more uniform dispersion of particles in the matrix and also led to a decrease in mechanical properties due to an increase in porosity content of the composites compared with those of the samples stirred for shorter durations. Moreover, milling process affected particle distribution. Nanoparticles more uniformly dispersed in the Al2O3–Cu reinforced samples compared with that of the samples reinforced with Al2O3–Al or pure alumina powders. |
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| Keywords: | A. Metal–matrix composites D. Mechanical testing D. Electron microscopy E. Casting |
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