Optimizing surface roughness of AZ91/SiC composite during machining

Abstract

From past numerous years lightweight materials like magnesium are upgrading their use in a few applications and enterprises. This rising need of magnesium moves numerous scientists to take in its utilization in various practices. In the present paper, the statistical investigation on surface roughness of magnesium alloy (AZ91) metal matrix composites using Taguchi technique has been reported. The composites reinforced with SiC of average size 37 µm were processed by stir casting route. Surface roughness of AZ91-SiC composites were measured under dry turning conditions at different spindle speed (275, 350, and400 rpm), feed rate (rate 0.1, 0.2, and 0.4 mm.), and composition (0, 2, and 3.5 wt pct of each of SiC). The design of experiments approach using Taguchi technique was employed to statistically analyze the surface roughness of the composites. Signal-to-noise ratio and analysis of variance were used to investigate the influence of the parameters on the surface roughness.