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Abstract. Due to their lightweight, new classes of materials, including aluminum-based Metal Matrix Composites (MMCs), have been popular in recent years in various industries, including aircraft and automobiles. Because of its low cost and ease of availability, aluminum alloy (LM13) MMCs were developed using Rice Husk Ash (RHA) as reinforcement in this study rather than traditional reinforcement, and composites were prepared using the stir casting technique. LM13-15wt.%RHA composite was chosen for the present machining study. The Central Composite Design (CCD) with three input parameters at three levels based on the best outcomes was adopted for this experimental study. A mathematical model was developed to predict the machining responses of Material Removal Rate (MRR) and surface roughness. The most significant variables were evaluated using ANOVA. The main and interactive effects of the input variables on the predicted responses are determined. The experimental and predicted values are nearly identical, indicating that the developed models can accurately predict responses. The optimal value of the turning parameters was obtained from desirability analysis. The obtained desirability value for turning parameters is 0.863, and for output response, the desirability value for surface roughness and MRR is 0.71663 and 0.747491, respectively, and the combined desirability is 0.731898.

KEYWORDS

LM13;

RHA;

CCD;

Surface roughness;

MRR;

RSM.

1. Introduction

The emergence of new composite materials is continually evolving the engineering market globally and expanding their use in most engineering applications such as cylinder block linear, automotive pistons, calipers, bicycle frames, etc. Composite materials are currently piquing the interest of researchers owing to their admirable mechanical attributes. Metal Matrix Composites (MMCs) have excellent impact resistance, tensile strength, and wear resistance. Composites are more extensively used than traditional materials because of their adaptability in extending mechanical properties [1]. Aluminum matrix composites have developed a firm place in the lightweight materials category due to a wide range of desirable properties, including low density, good wear resistance, and corrosion resistance [2,3].

Many researchers and authors [4-7] have worked and reported the considerable benefits of Al-MMC and MMC compared to well-known conventional engineering materials. Due to their immense availability and cheap nature, agricultural products and by-products have been explored as noteworthy reinforcement constituents. As a result, several researchers have looked at various farming wastes and discovered they are...

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