Investigation of Wire Electro Discharge Machining of Nickel-Titanium Shape Memory Alloys on Surface Roughness and MRR

Shape memory alloys are kind of smart materials, which have distinctive properties and are superior in compare with other alloys. Severe reactions to thermodynamic and mechanical parameters and ability to return to their original shape make these alloys distinctive from other alloy regarding machining ability. Since these alloys have a very useful application in various fields such as aerospace, automobile, medicine, dentistry, the present paper surveys the effect of wire electrical discharge machining on them. Surface roughness and material removal rate are the most important parameters of machining which influence product quality and machining time. Reducing surface roughness improves fatigue resistance, corrosion and wear resistance of work piece. Increasing the removal rate and reducing machining time decline the production costs and increase production. The present research seeks to investigate the effect of wire electrical discharge machining parameters on surface roughness and removal rate of NiTi60. Results reveal that increasing current pulse, pulse on-time and wire speed increase surface roughness and material removal rate. [Daneshmand S, Hessami R, Esfandiar H. Investigation of Wire Electro Discharge Machining of NickelTitanium Shape Memory Alloys on Surface Roughness and MRR. Life Sci J 2012; 9(4):2904-2909] (ISSN: 1097-8135). http://www.lifesciencesite.com. 426