Abstract
ABSTRACT Surface modification of magnesium alloy enables the improvement of wear characteristics for use in sliding applications and places where surface hardness improvement is essential without affecting the microstructure of the underneath material. In this study, a pin-on disc wear test was used to examine the dry sliding wear behaviour of AZ61 Mg alloy reinforced with nTiO2 by a recursive friction stir processing technique. The trio-behavior of the surface-modified Mg alloy was detailed by the response surface methodology-central composite design matrix with the use of design experiments, considering three levels of reinforcement (%), sliding speed, and axial load parameters. In order to achieve the desired results of minimal wear loss, lower friction coefficient (COF), and lower friction force between surfaces (FF), this present work employed design expert software to develop a generative mathematical model to optimize the process parameters. Wear mechanisms were investigated using images captured by scanning electron microscope.
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