Modeling and Analysis of Wire EDM Process Parameters for AZ-31 Alloy Using Response Surface Methodology

Abstract

AbstractMagnesium alloys are some of the recently developed biomaterials that have a number of beneficial properties including biocompatibility, biodegradability, and mechanical properties that are comparable to that of bone. The poor corrosion resistance of magnesium alloys is sometimes beneficial in terms to avoid the second surgery to remove the implant. This paper focuses on the machining characteristics of the wire EDM process for AZ-31 alloy. The input process parameters selected based on past literature are pulse-on duration, servo voltage, wire tension, and wire feed rate, whereas the output response is kerf width. The experiments are designed based on central composite design (CCD) of response surface methodology. To determine the critical process parameters, ANOVA analysis has also been conducted. Experimental results indicate that with the increase in pulse-on duration and servo voltage, kerf width of AZ-31 alloy always increases, whereas the kerf width for AZ-31 alloy always decreases with an increase in wire feed rate and wire tension.KeywordsAZ-31Kerf widthWire EDMRSM