A Study on the Tribological Properties of Al-AlN-Y 2 W 3 O 12 Hybrid Composites
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JMEPEG https://doi.org/10.1007/s11665-020-05086-0
A Study on the Tribological Properties of Al-AlN-Y2W3O12 Hybrid Composites Jamuna Sethi, Sudipta Mohapatra, Abhijeet Sethi, Siddhartha Das, and Karabi Das (Submitted March 5, 2020; in revised form August 6, 2020) The effect of the amount of reinforcements, load, sliding distance and sliding speed on the wear properties of aluminum matrix hybrid composites (AMHCs) reinforced with yttrium tungstate (Y2W3O12) and aluminum nitride (AlN) has been investigated. The hardness and wear resistance of the composites improve with the increasing amount of AlN and Y2W3O12. The wear resistance increases with a decrease in the load and an increase in the sliding distance. The AMHCs exhibit the formation of a stable mechanically mixed layer along with fine grooves and oxides under mild conditions (low load, high sliding distance and low sliding speed) resulting in relatively low wear rate and coefficient of friction (COF). However, under severe conditions (high load, low sliding distance and high sliding speed), the formation of larger grooves along with heavy delamination increases the wear rate and COF. Response surface methodology is used to correlate the experimental values with the predicted values. The results show that the load and amount of reinforcement are significantly affecting the wear rate and COF. Keywords
aluminum matrix hybrid composites, coefficient of friction, delamination, grooves, mechanically mixed layer, response surface methodology, wear rate
1. Introduction Aluminum metal matrix composites (AMCs) are widely used in various engineering applications due to their good mechanical properties (Ref 1). Even though single reinforced AMCs have good frictional and wear resistance, further improvement of these properties requires two or more reinforcements into a single aluminum (Al) matrix, defined as aluminum matrix hybrid composites (AMHCs) (Ref 2-7). The AMHCs are deemed as the second generation composite materials, which are relatively new and show better properties such as higher strength-to-weight ratio, hardness and wear resistance as compared to single reinforced AMCs and monolithic metals (Ref 3, 5, 8-12). The AMHCs reinforced with a combination of reinforcements such as carbide/oxides, carbide/boride, carbide/graphite, oxide/graphite, oxide/boride and oxide/oxide have been reported in many studies (Ref 1316). In AMHCs, tribological properties depend upon various parameters, e.g., load, sliding distance, sliding speed and volume fraction, type, size and distribution of reinforcement particles into the Al matrix (Ref 17, 18). The fabrication route also significantly affects the tribological properties of the AMHCs (Ref 19). The AMHCs are fabricated through different
Jamuna Sethi, Sudipta Mohapatra, Siddhartha Das, and Karabi Das, Department of Metallurgical and Materials Engineering, Indian Institute of Technology-Kharagpur, Kharagpur, West Bengal 721302, India; and Abhijeet Sethi, Department of Mechanical Engineering, Indian Institute of Technology-Kharagpur,
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