Journal Published Online: 18 August 2020
Volume 9, Issue 1

High Temperature Tribology of A413/B C Nanocomposites under Dry Sliding Contact



In this work, boron carbide (B4C) particulate (0.5, 1.0, 1.5, and 2.0 weight %) reinforced A413 alloy nanocomposites were fabricated by ultrasonic stir casting method. The prepared aluminum matrix nanocomposites were characterized using optical microscopy and field emission scanning electron microscopy to observe particle dispersion and quantify microstructural features. A high temperature pin-on-disk tribo-tester was employed to investigate the dry sliding tribological behavior of fabricated nanocomposites and unreinforced alloy at a constant speed (0.66 m/s) and different loads (20, 60 N) over the temperature range of 50°C–200°C. Specimens were slid against an AISI SAE 52100 counterface for the fixed duration of 10 minutes. Worn surfaces were examined under the scanning electron microscopy, and energy dispersive spectroscopy analysis was carried out to understand the wear mechanisms. It was revealed that the wear resistance of the alloy improved because of increasing B4C content. The wear rate of all specimens was found to increase with increased load and operating temperatures. A shift in the mild oxidative to severe metallic wear of an unreinforced alloy was seen increased by about 50°C–80°C because of particulate reinforcement. The mild abrasive wear mechanism of the base alloy at low temperature was changed to adhesion with heavy plastic deformation at elevated temperature. Increased thermal stability offered by boron carbide particles and oxides and a mechanically mixed transfer layer were key factors enhancing the wear resistance of the nanocomposites. Under the tested experimental conditions A413/B4C nanocomposite was found suitable and better than the base alloy for use in wear resistance applications.

Author Information

Shinde, Deepak M.
Department of Mechanical Engineering, Jadavpur University, Kolkata, West Bengal, India
Poria, Suswagata
Department of Mechanical Engineering, Heritage Institute of Technology, West Bengal, India
Sahoo, Prasanta
Department of Mechanical Engineering, Jadavpur University, Kolkata, West Bengal, India
Pages: 20
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Stock #: MPC20200008
ISSN: 2379-1365
DOI: 10.1520/MPC20200008