Materials Today: Proceedings | 2021
Influence of process parameters on the machinability of nickel aluminum bronze alloy by electrochemical micromachining process – A desirability analysis approach
Abstract
Abstract The machining of Nickel Aluminum Bronze (NAB) via traditional machining methods creates many problems which include wear of the tool, the appalling surface of the finished product, large dimensional deviation, and excessive heat-affected area. These issues can be mitigated by non-traditional techniques such as electrochemical micromachining, electric discharge machining, laser beam machining, and plasma arc machining. Electrochemical micromachining (ECMM) works under the principle of anodic dissolution. Difficult to machine materials can be easily machined by ECMM technique. The micro-domain applications of NAB are found in perforated orifice and pharmaceutical industries. In this study, micro-drilling on NAB alloy was conducted using the ECMM process. The influence of two different electrolytes such as sodium chloride (non-passivating) and sodium nitrate (passivating) while micromachining NAB alloy was analyzed. The response surface methodology (RSM) approach was proposed to obtain the maximum material removal rate (MRR). The output response MRR was analyzed using desirability analysis. The NAB alloy machined with sodium chloride electrolyte was found to have 2.20 times higher MRR than the component machined with sodium nitrate solution.