Modeling, Simulation and Experimental Validation of Electric Discharge Machining of NiTi Alloys

Vijaykumar S. Jatti; T. P. Singh

doi:10.15866/iremos.v8i2.5690

Modeling, Simulation and Experimental Validation of Electric Discharge Machining of NiTi Alloys

Vijaykumar S. Jatti^(1*), T. P. Singh⁽²⁾

^(*) Corresponding author

Authors' affiliations

DOI: https://doi.org/10.15866/iremos.v8i2.5690

Abstract

NiTi alloys are one type of shape memory alloys which are called as functional materials. It is a binary alloy of nickel and titanium which has striking properties namely corrosion resistance, electrical resistance, good fatigue life, shape memory and super-elasticity. Because of these properties NiTi alloy finds application in almost all industries such as manufacturing of medical devices, recreations, safety gears, clothing, industrial and military. This study discusses the modeling and simulation of single discharge during machining of NiTi workpiece using ANSYS finite element software. A three-dimensional axis-symmetric model has been developed to simulate the temperature field during machining of NiTi alloy using Electrical Discharge Machine and to estimate the material removal rate of NiTi alloy. Experiments were carried out to validate the numerical results. The coefficient of correlation for MRR obtained from numerical method is 98.6148 % with the experimental MRR. The average percentage error obtained between numerical and experimental is 7.1 %. Thus, the numerical model can efficiently predict material removal rate of NiTi alloys.
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Keywords

NiTi Alloys; Thermal Transient Analysis; Material Removal Rate; ANSYS; Numerical Method

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