Dry Sliding Wear Behavior of Hydroxyapatite Reinforced Az91d Mg Alloy Metal Matrix Composites

Abstract

The present work aims to increase the tribological performance of magnesium alloy matrix material reinforced with hydroxyapatite ceramic particulates. Reinforcement of hydroxyapatite particulate effects on wear behavior of AZ91D mg alloy was analyzed using Taguchi technique have been reported. The average grain size of 63μm reinforcement particulates were used to fabricate the composites by stir casting process. Dry sliding wear behaviour of various weight percentages of (2, 3 & 4 wt%) hydroxyapatite reinforced composites were tested on pin-on-disk machine using different loads of 5, 10, 15 and 20N, sliding velocity of 0.5, 1, 1.5 and 2.0 m/s at a sliding distance of 500, 750,1000, 1250 mm respectively. DOE approach using Taguchi technique was engaged to analyze the wear behavior and coefficient of frication of the composites. Analysis of variance and Signal-to-noise ratio was used to inspect the influence parameters for wear rate and coefficient of Friction.