Exploring the effects of self-lubricating MoS2 in magnesium metal matrix composite: Investigation on wear, corrosion, and mechanical properties

Abstract

The prime focus of this experimentation is to develop a lightweight self-lubricating surface composite with superior wear resistance. This article inquires into the consequences of Molybdenum di Sulphide (MoS2) for its 2, 4, and 6 vol% dispersion on magnesium surface by applying friction stir processing (FSP). The prepared composites were analysed for their microstructure, mechanical, and wear characteristics. The observation of the microstructure reveals the smaller grain size as a result crystallization process occurring during FSP and the uniform dispersion of reinforced particles. The surface composite shows a growing tendency in its hardness which can be assumed as the outcome of the reduced grain size and reinforcement dispersion. On the other hand, the developed composite exhibited lower tensile characteristics than the base matrix. The composite shows constructive enhancement in wear resistance with the increase in the vol% of MoS2 particles whereas the increase in load increases the wear rate. The value of the corrosion rate is decreased up to 60 % with 2 % reinforcement addition whereas further addition resulted in a higher corrosion rate.