Sand Abrasive Wear Behavior of Hot Forged Al 6061-TiO2 Composites |
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Authors: | C S Ramesh T P Bharathesh S M Verma R Keshavamurthy |
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Affiliation: | (1) Department of Mechanical Engineering, PES Institute of Technology, Bangalore, India;(2) Department of OR & SQC, Royalseema University, Kurnool, AP, India |
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Abstract: | Nickel-coated TiO2 particulate reinforced Al6061 matrix composites developed using the vortex technique were hot forged at a temperature of
500 °C. A constant deformation ratio of 6:1 was adopted. Hot forged Al6061 alloy and Al6061-TiO2 composites were then subjected to heat treatment by solutionizing at a temperature of 530 °C for duration of 2 h followed
by ice quenching. Both natural and artificial aging at 175 °C were performed on the quenched samples from 2 to 8 h duration
in steps of 2. Microstructure, microhardness, and dry sand abrasive wear behavior of both matrix alloy and developed composites
in both as-forged and heat-treated conditions have been evaluated. Worn surface studies have been carried out using scanning
electron microscope. Results have revealed that nickel-coated TiO2 particles are uniformly distributed through out the matrix alloy. Microhardness of Al6061-TiO2 composites increases with increase in percentage of reinforcement. Heat-treated forged alloy and its composites possesses
higher hardness when compared with the forged composites. Forged Al6061-TiO2 composites exhibited lower abrasive wear loss when compared with the forged matrix alloy. Heat treatment has a profound effect
on the abrasive wear resistance of both as-forged Al6061 alloy and Al6061-TiO2 composites. |
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