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Effect of Mg2Si Concentration on the Dry Sliding Wear Behavior of Al-Mg2Si Composite

[+] Author and Article Information
Prosanta Biswas

Metallurgical and Materials Engineering Department National Institute of Technology, Durgapur Durgapur, West Bengal 713209 India pb.15MME1104@phd.nitdgp.ac.in

Manas Kumar Mondal

Department of Metallurgical and Materials Engineering, NIT Durgapur M.G, Avenue Durgapur, West Bengal 713209 India manaskumar.mondal@mme.nitdgp.ac.in

Durbadal Mandal

Metallurgical and Materials Engineering Department National Institute of Technology, Durgapur DURGAPUR, West Bengal 713209 India durbadal.mandal@mme.nitdgp.ac.in

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received September 25, 2018; final manuscript received May 9, 2019; published online xx xx, xxxx. Assoc. Editor: Yonggang Meng.

ASME doi:10.1115/1.4043779 History: Received September 25, 2018; Accepted May 09, 2019

Abstract

The microstructural morphology and wear behavior of as cast Al-X wt.% Mg2Si (X = 0.0, 5.0, 10.0, 15.0 and 20.0) composites were investigated through optical microscopy (OM), energy dispersive X-ray (EDX) spectrometry, scanning electron microscopy (SEM) and field emission scanning electron microscopy (FESEM). The dry sliding wear behavior was studied against an EN 31 hardened steel disk at four different applied loads (19.6 N, 29.4 N, 39.2 N and 49 N) with a sliding speed of 62.8 m/min for 1 hours. The optical microscopy analysis exhibit that the primary Mg2Si particles average equivalent diameter and volume fraction is increased with increase in Mg2Si (Mg and Si) concentration in the Al- Mg2Si composite. Therefore, the bulk hardness of the composites is increased, whereas, the primary Mg2Si hardness decreased, because the coarser primary Mg2Si particles have less compactness. The wear resistance of the commercially pure aluminium significantly improved due to Mg2Si reinforcement and the wear resistance is increased with the increase in Mg2Si concentration up to 15.0 wt.% and then decreased at 20.0 wt.%. The tested composites worn surfaces and debris exhibit adhesion, delamination, microcutting-abrasion, abrasive and oxidation type wear mechanism.

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