Title: Effect of Al₂O₃ nanoparticles on tribological behaviour of Mg-6Al alloy-based nanocomposites

Authors: K. Bimla Mardi; Amit Rai Dixit; Ashis Mallick; A. Ramana Reddy

Addresses: Department of Mechanical Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Jharkhand, 826004, India ' Department of Mechanical Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Jharkhand, 826004, India ' Department of Mechanical Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Jharkhand, 826004, India ' Department of Mechanical Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Jharkhand, 826004, India

Abstract: This paper investigates the tribological properties of Mg-6Al alloy-based nanocomposites reinforced with nano-size alumina nanoparticles. Dry sliding wear tests were performed in the pin-on-disc arrangement opposite to a D2 steel counterface under various sliding velocities 0.8-2.0 m/s with 10 N, 30 N and 60 N normal loads at room temperatures. The variations in volumetric wear rate and friction coefficient with the sliding distances 300 m for different normal loads and sliding velocities were analysed. The worn pins and wear debris were then examined to reveal its wear features using a field emission scanning electron microscopy. The outcomes of the study reveal that there is a gradual decrease in wear rates with sliding speeds under all load conditions. The values of friction coefficient for nanocomposites varies between 0.15-0.23 and reaches minimums at 2.0 m/s under 10 N and 1.8 m/s under 30 N and 60 N load.

Keywords: Mg-based nanocomposites; wear rates; friction coefficient; wear mechanism.

DOI: 10.1504/IJSURFSE.2018.096751

International Journal of Surface Science and Engineering, 2018 Vol.12 No.5/6, pp.402 - 418

Received: 02 Apr 2018
Accepted: 21 Apr 2018
Published online: 10 Dec 2018 *

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