Examination of Abrasive water jet machining for Al hybrid composites using RSM-Central composite design

This paper presents an analytical approach for optimizing machining parameters in Al-5456/ B4C/ Al2O3 hybrid composites using abrasive water jet machining. The influence of three input parameters, namely Standoff distance (SD), Water pressure (WP), and Jet speed (JS) on two output responses namely material removal rate (MRR), and surface roughness (SRS). Central composite design (CCD) is a popular experimental design technique used in response surface methodology (RSM) for designing experiments and modeling the response of a system to various factors. RSM is commonly used in fields such as engineering, chemistry, and manufacturing to optimize processes and improve product quality. Three factors at three levels in central composite design (CCD) are selected to formulate the experimental design with the support of RSM. The higher MRR is obtained in Experiment no:18 whereas the lowest surface roughness is observed in Experiment no:1. From ANOVA results, it is concluded that the variables WP, SD*JS, WP*JS are the most significant variables to improve the MRR on machining of Al hybrid composites because p-value is less than 0.05. Similarly, in surface roughness, SD is most significant variable followed by WP and JS.