Prospects for electrochemical discharge micro-drilling of sustainable materials: An extensive review

Among all the hybrid machining techniques, electrochemical discharge micro-drilling (ECDMD) is the most current and challenging process. With no residual stress, it is utilized to create micro-features of accurately and precisely holes on electrically non-conductive composite materials that are either hard or rigid. Micro-features of electrochemical drilling (ECD) and electro-discharge drilling (EDD) processes are integrated into an ECDMD process, and its principle is based on the electro-discharge mechanism. Comparing the ECDMD configuration to traditional drilling, it is more appropriate for creating precise holes in non-conductive, sustainable materials. This article focuses on the fundamentals of the ECD micro-drilling process by using a tabular analysis to review the experiments conducted by earlier researchers. Furthermore, recent studies address how input parameters impacted the features of the drilling process, and the fishbone diagram aids in representing the process responses of the ECDMD method. Based on a thorough review of the literature, pie charts and line diagrams have been utilized to analytically depict the range of non-conductive sustainable materials, year-by-year publications and research potential.