Effect of hybridizing and optimization of TiC on the tribological behavior of Mg-MoS2 composites

[+] Author and Article Information
P. Narayanasamy

Assistant Professor, Department of Mechanical Engineering, Kamaraj College of Engineering and Technology, Virudhunagar-626001, Tamilnadu, India

N. Selvakumar

Senior Professor, Department of Mechanical Engineering, Mepco Schlenk Engineering College, Sivakasi-626005, Tamilnadu, India

1Corresponding author.

ASME doi:10.1115/1.4035383 History: Received July 21, 2016; Revised November 23, 2016


In the present study, the effects of TiC content on the microstructure, hardness and wear property are to be investigated. Magnesium matrix hybrid composites reinforced with varying wt.% of TiC (0, 5, 10, 15, 20) and a fixed wt.% of MoS2 (7.5) were produced by Powder Metallurgy. The microstructure of the hybrid composite samples was analyzed using optical microscopy. Elemental composition of sintered specimens was determined by EDS analysis. The Vicker's hardness test was performed in different locations on the sintered specimen surface with a load of 5 g and 15 s dwell time. The dry sliding wear test was carried out in a pin-on-disc wear testing machine at various load (5-30 N), velocity (0.5 - 3 m/s), and sliding distance (500-3000 m). Tribological investigation was statistically analyzed using Taguchi L27 orthogonal array with three factors at three levels. A graphical and numerical optimization technique was used to find the optimum value of TiC content using the predicted value of the responses. The tribological properties of the fabricated composites improved significantly compared to that of the magnesium matrix due to the combined effect obtainable by both reinforcements.

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