Effect of Heat Treatment on Wear Behavior of A357/Cenosphere Composites
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ORIGINAL ARTICLE
Effect of Heat Treatment on Wear Behavior of A357/Cenosphere Composites Tanusree Bera1 • Ved Prakash1 • S. K. Acharya1 • Goutam Sutradhar2
Received: 25 June 2020 / Accepted: 22 September 2020 Ó The Indian Institute of Metals - IIM 2020
Abstract The present paper is based on the effect of heat treatment on the wear behavior of A357/cenosphere composites. The aluminum metal matrix composites were fabricated by the squeeze casting method. Both base alloy and composites are heat treated. The hardness of the matrix alloy and composites, both in as cast and heat-treated conditions, is measured by Vickers microhardness tester. The mechanical properties of the Al alloy/cenosphere composites got enhanced due to dispersion hardening, grain boundary strengthening and Orowan strengthening. The abrasive wear behavior was carried out on the composites using pin-ondisk wear tester with various operating parameters. The wear test results showed that the matrix alloy suffered higher wear rate than that of composites both in untreated and heattreated conditions, depending on load. Keywords Abrasive wear behavior A357/cenosphere composites Squeeze casting process Heat-treated Pin-on-disk wear tester Mechanical properties
1 Introduction Fly ash cenosphere is a waste product from the thermal power plants. It consists of fine particulates of burned coal. It is an inexpensive resource material. Fly ash cenosphere & Tanusree Bera [email protected] 1
Department of Mechanical Engineering, National Institute of Technology Rourkela, Rourkela, India
2
Department of Mechanical Engineering, National Institute of Technology Manipur, Manipur, India
can be used as reinforcement in the aluminum metal matrix composites to develop the composites which can overcome the cost barrier for various applications in automobile and industrial applications [1]. These composites are of low densities, high corrosion resistance, good strength and quite good wear resistance. But the wear behavior and strength of the composites can be enhanced more by heat treatment, to utilize the composites in advance automotive and engine applications [2]. Heat treatment is an important method for controlling the mechanical and wear properties of a cenosphere reinforced aluminum matrix material. The heat treatment represents a condition when the microstructure of aluminum alloy is solutionized, quenched and again heat treated (artificially aged). This process improves the microstructure, results in the strengthening of the materials and tailors the mechanical and wear properties. Many researchers have found that the heat treatment of metals has advantages for the improvement of the mechanical and wear properties. For instance: Maleque and Karim [3] worked on the wear behavior of heat treated SiC reinforced aluminum cast composites, and heat-treated composites. It was observed that there was an improvement in the wear resistance properties of the heat-treated SiCp reinforced aluminum metal matrix composites than the simply aluminum cast com
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