Development of empirical models and machinability comparison on wire electrical discharge machining of aluminium based hybrid and metal matrix composites

Aluminum based Metal Matrix and Hybrid Composites are known to have various advantages over conventional materials when it comes to their various engineering applications, namely aerospace, automotive, and marine. Because of their enhanced characteristics, such as their strength and hardness, they are more commonly utilized in these areas. Due to their reinforced properties, the manufactured composites became more harder which complicates the machining while comparing with the base material. This makes the process of material removal more complex. One of the most common methods of removing these materials is through wire electrical discharge machining. This process allows the easy removal of these materials regardless of their hardness. In this study, the mechanical properties of different types of metal matrix and hybrid composites were analysed through wire electrical discharge machining. An explorative investigation has been performed to analyse the machinability of stir casted aluminium based hybrid and metal matrix composites (AA2024 + BN, AA2024 + AL(2)O(3) + BN). Taguchi's approach performs the planning of experiments and analysis of the attained data. The output measures considered in this investigation are material removal rate and dimensional deviation. The empirical relationships are developed by the multiple regression approach which is used to reveal the relationship between the independent and dependent variables. Various Multi Criteria Decision Making tools are adopted and the machinability of selected composites are analysed.