Analysis and Modeling of Electro Discharge Machining Input Parameters of Nitinol Shape Memory Alloy by De-ionized Water and Copper Tools

摘要

Nowadays, NiTi alloy is one of the shape memory alloys that its applications have grown in allindustries. Its unique properties compared with some mechanical and thermo dynamical parameterslead in being applicable in industries such as aerospace, medicine and automobile. In the present study,EDM was modeled on NiTi alloy be means of de-ionized water and copper tools. EDM technique hasdifferent input parameters which influence on the outputs. Machining duration and process instabilityincrease by experimental setting of input parameters. A mathematical modeling is required to make aprecise relation between input and output parameters. The experiments were chosen by Design ofExperiments (DOE) technique. Material removal rate and surface roughness were modeled withmachining parameters and regression equations. The results were studied by variance analysis(AVOVA) and the most precise model was chosen as final model. Suggested model helps to find theparameters which have the most effects on material removal rate and surface roughness of NiTi alloyusing de-ionized water and copper tools. Thus, material removal rate and surface roughness can bepredicted.