The effects of various reinforcements on dry sliding wear behaviour of AA 6061 nanocomposites |
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| Affiliation: | 1. Department of Production Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, India;2. Department of Mathematics, National Institute of Technology, Tiruchirappalli 620015, Tamil Nadu, India;3. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India;1. Department of Mechanical Engineering, N.I.T. Kurukshetra, Haryana, India;2. Mechanical Engineering Department, School of Engineering, Gautam Buddha University, Greater Noida, India;1. Department of Mechanical Engineering, JB Institute of Engineering & Technology, Hyderabad, Telangana 500075, India;2. Department of Mechanical Engineering, UBDT College of Engineering, Davangere, India;3. Affiliated to Visvesvaraya Technological University, Belagavi, Karnataka, India;4. Department of Mechanical Engineering, R.L. Jalappa Institute of Technology, Doddaballapur 561203, India;1. Department of Mechanical Engineering, Madha Engineering College, Chennai 600069, India;2. Department of Mechanical Engineering, V V College of Engineering, Tisaiyanvilai, 627657 Tirunelveli, Tamil Nadu, India;3. Department of Mechanical Engineering, College of Engineering Guindy, Anna University, Chennai 600025, India;4. Department of Mechanical Engineering, Mepco Schlenk Engineering College, Virudhunagar 626 005, Tamil Nadu, India |
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| Abstract: | The present work aims to investigate the dry sliding wear behaviour of AA 6061 nanocomposites reinforced with various nanolevel reinforcements, such as titanium carbide (TiC), gamma phase alumina (γ-Al2O3) and hybrid (TiC + Al2O3) nanoparticles with two weight percentages (wt.%) prepared by 30 h of mechanical alloying (MA). The tests were performed using a pin-on-disk wear tester by sliding these pin specimens at sliding speeds of 0.6, 0.9 and 1.2 m/s against an oil-hardened non-shrinking (OHNS) steel disk at room temperature. Wear tests were conducted for normal loads of 5, 7 and 10 N at different sliding speeds at room temperature. The variations of the friction coefficient and the wear rate with the sliding distances (500 m, 1000 m and 1600 m) for different normal loads and sliding velocities were plotted and investigated. To observe the wear characteristics and to investigate the wear mechanism, the morphologies of the worn surfaces were analysed using a scanning electron microscope (SEM). The formation of an oxide layer on the worn surface was examined by energy dispersive spectroscopy (EDS). The wear rate was found to increase with the load and sliding velocity for all prepared nanocomposites. Hybrid (TiC + Al2O3) reinforced AA 6061 nanocomposites had lower wear rates and friction coefficients compared with TiC and Al2O3 reinforced AA 6061 nanocomposites. |
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